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17637f427b
...
8fc5ad9868
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@ -3,14 +3,12 @@ import numpy as np
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import cv2
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import os
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import time
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import math
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from shapely.geometry import LineString
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from queue import Queue
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import aruco
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class ArucoEstimator:
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corner_marker_ids = {
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'a': 0,
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@ -44,7 +42,7 @@ class ArucoEstimator:
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# Configure depth and color streams
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self.pipeline = rs.pipeline()
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config = rs.config()
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# config.enable_stream(rs.stream.color, 1920, 1080, rs.format.bgr8, 30)
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#config.enable_stream(rs.stream.color, 1920, 1080, rs.format.bgr8, 30)
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config.enable_stream(rs.stream.color, 1280, 720, rs.format.bgr8, 30)
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# Start streaming
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@ -70,6 +68,10 @@ class ArucoEstimator:
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# create detector and get parameters
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self.detector = aruco.MarkerDetector()
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# self.detector.setDictionary('ARUCO_MIP_36h12')
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#self.detector.setDictionary('ARUCO_MIP_16h3')
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# self.detector.setDictionary('ARUCO')
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#self.detector.setDetectionMode(aruco.DM_NORMAL, 0.05)
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self.detector.setDetectionMode(aruco.DM_VIDEO_FAST, 0.05)
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self.detector_params = self.detector.getParameters()
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@ -85,12 +87,18 @@ class ArucoEstimator:
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self.camparam.readFromXMLFile(os.path.join(os.path.dirname(__file__), "realsense.yml"))
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else:
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self.camparam.readFromXMLFile(os.path.join(os.path.dirname(__file__), "dfk72_6mm_param2.yml"))
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print(self.camparam)
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self.drag_line_end = None
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self.drag_line_start = None
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self.previous_click = None
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def compute_clicked_position(self, px, py):
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def mouse_callback(self, event, px, py, flags, param):
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"""
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This function is called for each mouse event inside the opencv window.
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If there are reference markers available we compute the real world position corresponding to the clicked
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position and put it in an event queue.
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:param event: type of event (mouse movement, left click, right click, etc.)
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:param px: x-position of event
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:param py: y-position of event
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"""
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if event == cv2.EVENT_LBUTTONDOWN:
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if self.all_corners_detected():
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# inter/extrapolate from clicked point to marker position
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px1 = self.corner_estimates['a']['pixel_coordinate'][0]
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@ -110,50 +118,12 @@ class ArucoEstimator:
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target_x = x1 + alpha * (x3 - x1)
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target_y = y1 + beta * (y3 - y1)
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target = np.array([target_x, target_y])
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target = np.array([target_x, target_y, 0])
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print(f"target = ({target_x},{target_y})")
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self.event_queue.put(('click', target))
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else:
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print("not all markers have been detected!")
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target = np.array([px, -py])
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return target
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def mouse_callback(self, event, px, py, flags, param):
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"""
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This function is called for each mouse event inside the opencv window.
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If there are reference markers available we compute the real world position corresponding to the clicked
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position and put it in an event queue.
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:param event: type of event (mouse movement, left click, right click, etc.)
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:param px: x-position of event
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:param py: y-position of event
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"""
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target = None
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if event == cv2.EVENT_LBUTTONDOWN:
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self.drag_line_start = (px, py)
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elif event == cv2.EVENT_LBUTTONUP:
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self.drag_line_end = (px, py)
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target_pos = self.compute_clicked_position(self.drag_line_start[0], self.drag_line_start[1])
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if self.drag_line_start != self.drag_line_end:
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# compute target angle for clicked position
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facing_pos = self.compute_clicked_position(px, py)
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v = facing_pos - target_pos
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target_angle = math.atan2(v[1], v[0])
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else:
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# determine angle from previously clicked pos (= self.drag_line_end)
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if self.previous_click is not None:
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previous_pos = self.compute_clicked_position(self.previous_click[0], self.previous_click[1])
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v = target_pos - previous_pos
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target_angle = math.atan2(v[1], v[0])
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else:
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target_angle = 0.0
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target = np.array([target_pos[0], target_pos[1], target_angle])
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print(target)
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self.previous_click = (px, py)
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self.event_queue.put(('click', {'x': target[0], 'y': target[1], 'angle': target[2]}))
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self.drag_line_start = None
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elif event == cv2.EVENT_MOUSEMOVE:
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if self.drag_line_start is not None:
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self.drag_line_end = (px, py)
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def run_tracking(self, draw_markers=True, draw_marker_coordinate_system=False, invert_grayscale=False):
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"""
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@ -162,9 +132,6 @@ class ArucoEstimator:
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cv2.namedWindow('RoboRally', cv2.WINDOW_AUTOSIZE)
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cv2.setMouseCallback('RoboRally', self.mouse_callback)
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fps_display_rate = 1 # displays the frame rate every 1 second
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fps_counter = 0
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start_time = time.time()
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try:
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running = True
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while running:
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@ -190,16 +157,16 @@ class ArucoEstimator:
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# extract data for detected markers
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detected_marker_data = {}
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for marker in detected_markers:
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if marker.id >= 0:
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detected_marker_data[marker.id] = {'marker_center': marker.getCenter()}
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if marker.id >= 0:
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if marker.id in self.corner_marker_ids.values():
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marker.calculateExtrinsics(0.075, self.camparam)
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marker.calculateExtrinsics(0.1, self.camparam)
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else:
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marker.calculateExtrinsics(0.07, self.camparam)
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detected_marker_data[marker.id]['Rvec'] = marker.Rvec
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detected_marker_data[marker.id]['Tvec'] = marker.Tvec
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if marker.id >= 0: # draw markers onto the image
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if draw_markers:
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marker.draw(color_image, np.array([255, 255, 255]), 2, True)
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@ -215,20 +182,6 @@ class ArucoEstimator:
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color_image = self.draw_grid_lines(color_image, detected_marker_data)
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color_image = self.draw_robot_pos(color_image, detected_marker_data)
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# draw drag
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if self.drag_line_start is not None and self.drag_line_end is not None:
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color_image = cv2.line(color_image, self.drag_line_start, self.drag_line_end, color=(0, 0, 255), thickness=2)
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# compute frame rate
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fps_counter += 1
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delta_t = time.time() - start_time
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if delta_t > fps_display_rate:
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fps_counter = 0
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start_time = time.time()
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color_image = cv2.putText(color_image, f"fps = {(fps_counter / delta_t):.2f}", (10, 25), cv2.FONT_HERSHEY_PLAIN, 2,
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(0, 255, 255),
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thickness=2)
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# Show images
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cv2.imshow('RoboRally', color_image)
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key = cv2.waitKey(1)
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@ -239,7 +192,7 @@ class ArucoEstimator:
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self.draw_grid = not self.draw_grid
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if key == ord('q'):
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running = False
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if key == ord('x'):
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if key == ord('a'):
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color_sensor = self.pipeline.get_active_profile().get_device().query_sensors()[1]
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if color_sensor.get_option(rs.option.enable_auto_exposure) == 1.0:
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color_sensor.set_option(rs.option.enable_auto_exposure, False)
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@ -247,8 +200,6 @@ class ArucoEstimator:
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else:
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color_sensor.set_option(rs.option.enable_auto_exposure, True)
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print("auto exposure ON")
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if key == ord('i'):
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invert_grayscale = not invert_grayscale
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finally:
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cv2.destroyAllWindows()
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if self.pipeline is not None:
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@ -293,7 +244,7 @@ class ArucoEstimator:
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_, _, _, _, _, _, euler_angles = cv2.decomposeProjectionMatrix(pose_mat)
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angle = -euler_angles[2][0] * np.pi / 180.0
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self.robot_marker_estimates[marker_id] = {'t': float(t_image), 'x': float(x), 'y': float(y), 'angle': float(angle)}
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self.robot_marker_estimates[marker_id] = {'t': t_image, 'x': x, 'y': y, 'angle': angle}
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def all_corners_detected(self):
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# checks if all corner markers have been detected at least once
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@ -1,80 +0,0 @@
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import numpy as np
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import time
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from robot import ControlledRobot
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from pid_controller import PIDController
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from event_listener import EventListener
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class CommanderBase:
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def __init__(self):
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self.robots = []
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self.robots = [ControlledRobot(12, '10.10.11.91')] # , Robot(13, '192.168.1.13'), Robot(14, '192.168.1.14')]
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# self.robots = [ControlledRobot(marker_id=13, ip='10.10.11.90'),
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# ControlledRobot(marker_id=14, ip='10.10.11.89')]
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for r in self.robots:
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r.connect()
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r.attach_controller(PIDController())
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self.event_listener = EventListener(event_server=('127.0.0.1', 42424))
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self.current_robot_index = 0
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self.controlling = False
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self.running = False
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def run(self):
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unconnected_robots = list(filter(lambda r: not r.connected, self.robots))
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if len(unconnected_robots) > 0:
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print(f"warning: could not connect to the following robots: {unconnected_robots}")
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return
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all_detected = False
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while not all_detected:
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undetected_robots = list(filter(lambda r: None in r.get_measurement(), self.robots))
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all_detected = len(undetected_robots) == 0
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if not all_detected:
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print(f"warning: no measurements available for the following robots: {undetected_robots}")
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time.sleep(0.5)
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print("starting control")
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self.running = True
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while self.running:
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while not self.event_listener.event_queue.empty():
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event = self.event_listener.event_queue.get()
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self.handle_event(event)
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def handle_event(self, event):
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# handle events from opencv window
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print("event: ", event)
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if event[0] == 'click':
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target = event[1]
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target_pos = np.array([target['x'], target['y'], target['angle']])
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self.robots[self.current_robot_index].move_to_pos(target_pos)
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elif event[0] == 'key':
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key = event[1]
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if key == 32: # arrow up
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self.controlling = not self.controlling
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if not self.controlling:
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print("disable control")
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for r in self.robots:
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r.stop_control()
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else:
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print("enable control")
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for r in self.robots:
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r.start_control()
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elif key == 9: # TAB
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# switch controlled robot
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self.current_robot_index = (self.current_robot_index + 1) % len(self.robots)
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robot = self.robots[self.current_robot_index]
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print(f"controlled robot: {robot.id}")
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elif key == 113 or key == 27: # q or ESCAPE
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print("quit!")
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for r in self.robots:
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r.stop_control()
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self.running = False
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if __name__ == '__main__':
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rc = CommanderBase()
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rc.run()
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@ -1,59 +0,0 @@
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import threading
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import time
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class ControllerBase:
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def __init__(self, control_rate=0.1):
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self.robot = None
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self.controlling = False
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self.target_pos = None
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self.control_thread = None
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self.control_rate = control_rate
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def control_loop(self):
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while self.controlling:
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if self.target_pos is not None:
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state = self.get_measured_position()
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control = self.compute_control(state)
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self.apply_control(control)
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time.sleep(self.control_rate)
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self.apply_control((0.0, 0.0)) # stop robot
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def set_target_position(self, target_pos):
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self.target_pos = target_pos
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def get_measured_position(self):
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if self.robot is not None:
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return self.robot.get_measurement()
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else:
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raise Exception("error: controller cannot get measurement!\n"
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" there is no robot attached to the controller!")
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def compute_control(self, state):
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return 0.0, 0.0
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def apply_control(self, control):
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if self.robot is not None:
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self.robot.send_cmd(u1=control[0], u2=control[1])
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else:
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raise Exception("error: controller cannot apply control!\n"
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" there is no robot attached to the controller!")
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def attach_robot(self, robot):
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self.robot = robot
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def start(self):
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self.controlling = True
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# start control thread
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self.control_thread = threading.Thread(target=self.control_loop)
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self.control_thread.start()
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def stop(self):
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# pause controller
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self.controlling = False
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if self.control_thread is not None:
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self.control_thread.join()
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@ -1,49 +0,0 @@
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import socket
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import threading
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import queue
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import json
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class EventListener:
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def __init__(self, event_server):
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self.event_thread = threading.Thread(target=self.receive_events)
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self.event_thread.daemon = True # mark thread as daemon -> it terminates automatically when program shuts down
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self.event_queue = queue.Queue()
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self.receiving = False
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# connect to event server
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print(f"connecting to event server on {event_server} ...")
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self.event_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # TCP socket
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try:
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self.event_socket.connect(event_server)
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self.event_socket.sendall(f"events\n".encode())
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self.event_socket.settimeout(0.1)
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# check if we receive data from the event server
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response = self.event_socket.recv(1024)
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if 'error' not in str(response):
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print("... connected! -> start listening for events")
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self.event_socket.settimeout(None)
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# if so we start the event thread
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self.event_thread.start()
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else:
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print(f"error: cannot communicate with the event server.\n The response was: {response}")
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except socket.timeout:
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print(f"error: the event server did not respond.")
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except ConnectionRefusedError:
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print(f"error: could not connect to event server at {event_server}.")
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def receive_events(self):
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self.receiving = True
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while self.receiving:
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received = str(self.event_socket.recv(1024), "utf-8")
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if len(received) > 0:
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events = received.split('\n')
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for event_json in events:
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if len(event_json) > 0:
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event = json.loads(event_json)
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self.event_queue.put(event)
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else:
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self.receiving = False
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print("event server seems to have shut down -> stop listening")
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@ -2,14 +2,12 @@ import socket
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HOST, PORT = "localhost", 42424
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robot_id = 12
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robot_id = 11
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.connect((HOST, PORT))
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sock.sendall(f"{robot_id}\n".encode()) # request data for robot with given id
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#sock.sendall(f"events\n".encode()) # request events
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receiving = True
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while receiving:
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# SOCK_DGRAM is the socket type to use for UDP sockets
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sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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sock.sendto(f"{robot_id}\n".encode(), (HOST, PORT))
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while True:
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received = str(sock.recv(1024), "utf-8")
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print("Received: {}".format(received))
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receiving = len(received) > 0
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|
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@ -1,60 +1,38 @@
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import socketserver
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import threading
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import time
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import json
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from aruco_estimator import ArucoEstimator
|
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class MeasurementHandler(socketserver.BaseRequestHandler):
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def handle(self) -> None:
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data = self.request.recv(1024).strip()
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data = self.request[0]
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socket = self.request[1]
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cur_thread = threading.current_thread()
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print(f"current thread {cur_thread}")
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if 'events' in data.decode():
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self.request.sendall('subscribed to events\n'.encode())
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# send input events
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while True:
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while not self.server.estimator.event_queue.empty():
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event = self.server.estimator.event_queue.get()
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self.request.sendall((json.dumps(event) + '\n').encode())
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self.server.estimator.last_event = None
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time.sleep(1.0 / self.server.max_measurements_per_second)
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else:
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# send robot position
|
||||
try:
|
||||
marker_id = int(data)
|
||||
except ValueError:
|
||||
marker_id = None
|
||||
|
||||
if marker_id is not None:
|
||||
if marker_id in self.server.estimator.robot_marker_estimates:
|
||||
while True:
|
||||
self.request.sendall((json.dumps(self.server.estimator.robot_marker_estimates[marker_id])
|
||||
+ '\n').encode())
|
||||
socket.sendto(f"{self.server.estimator.robot_marker_estimates[marker_id]}\n".encode(),
|
||||
self.client_address)
|
||||
time.sleep(1.0 / self.server.max_measurements_per_second)
|
||||
else:
|
||||
self.request.sendall("error: unknown robot marker id\n".encode())
|
||||
else:
|
||||
self.request.sendall("error: data not understood. "
|
||||
"expected <robot marker id (int)> or 'events'\n".encode())
|
||||
socket.sendto("error: unknown robot marker id\n".encode(),
|
||||
self.client_address)
|
||||
except ValueError:
|
||||
socket.sendto("error: data not understood. expected robot marker id (int)\n".encode(), self.client_address)
|
||||
|
||||
return
|
||||
|
||||
|
||||
class MeasurementServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
|
||||
allow_reuse_address = True
|
||||
|
||||
class MeasurementServer(socketserver.ThreadingMixIn, socketserver.UDPServer):
|
||||
def __init__(self, server_address, RequestHandlerClass, estimator, max_measurements_per_second=30):
|
||||
super().__init__(server_address, RequestHandlerClass)
|
||||
self.estimator = estimator
|
||||
self.max_measurements_per_second = max_measurements_per_second
|
||||
|
||||
def handle_error(self, request, client_address):
|
||||
print("an error occurred -> terminating connection")
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
aruco_estimator = ArucoEstimator(use_realsense=True, robot_marker_ids=[11, 12, 13, 14])
|
||||
|
|
@ -65,4 +43,4 @@ if __name__ == "__main__":
|
|||
max_measurements_per_second=30) as measurement_server:
|
||||
measurement_server.serve_forever()
|
||||
|
||||
# receive with: nc 127.0.0.1 42424 -> 12 + Enter
|
||||
# receive with: nc 127.0.0.1 42424 -u -> 15 + Enter
|
||||
|
|
|
|||
|
|
@ -2,17 +2,15 @@ import numpy as np
|
|||
import math
|
||||
import time
|
||||
|
||||
from controller import ControllerBase
|
||||
|
||||
class PIDController:
|
||||
def __init__(self, estimator):
|
||||
self.t = time.time()
|
||||
|
||||
class PIDController(ControllerBase):
|
||||
def __init__(self):
|
||||
super().__init__()
|
||||
self.t = None
|
||||
|
||||
self.estimator = estimator
|
||||
self.controlling = False
|
||||
|
||||
self.P_angle = 0.4
|
||||
self.P_angle = 0.4 # PID parameters determined by Ziegler-Nichols. measured K_crit = 1.4, T_crit = 1.5
|
||||
self.I_angle = 0.35
|
||||
self.D_angle = 0.1
|
||||
|
||||
|
|
@ -20,53 +18,198 @@ class PIDController(ControllerBase):
|
|||
self.I_pos = 0.3
|
||||
self.D_pos = 0.1
|
||||
|
||||
self.mode = 'combined'
|
||||
self.mode = None
|
||||
|
||||
self.e_angle_old = 0.0
|
||||
self.e_pos_old = 0.0
|
||||
def move_to_pos(self, target_pos, robot, near_target_counter=5):
|
||||
near_target = 0
|
||||
while near_target < near_target_counter:
|
||||
while not self.estimator.event_queue.empty():
|
||||
event = self.estimator.event_queue.get()
|
||||
print("event: ", event)
|
||||
if event[0] == 'click':
|
||||
pass
|
||||
elif event[0] == 'key':
|
||||
key = event[1]
|
||||
|
||||
self.i = 0.0
|
||||
self.i_angle = 0.0
|
||||
self.i_pos = 0.0
|
||||
if key == 84: # arrow up
|
||||
self.controlling = True
|
||||
self.t = time.time()
|
||||
elif key == 82: # arrow down
|
||||
self.controlling = False
|
||||
robot.send_cmd()
|
||||
elif key == 48: # 0
|
||||
target_pos = np.array([0.0, 0.0, 0.0])
|
||||
elif key == 43: # +
|
||||
self.control_scaling += 0.1
|
||||
self.control_scaling = min(self.control_scaling, 1.0)
|
||||
print("control scaling = ", self.control_scaling)
|
||||
elif key == 45: # -
|
||||
self.control_scaling -= 0.1
|
||||
self.control_scaling = max(self.control_scaling, 0.1)
|
||||
print("control scaling = ", self.control_scaling)
|
||||
elif key == 113:
|
||||
print("quit!")
|
||||
self.controlling = False
|
||||
robot.send_cmd()
|
||||
return
|
||||
elif key == 27: # escape
|
||||
print("quit!")
|
||||
self.controlling = False
|
||||
robot.send_cmd()
|
||||
return
|
||||
|
||||
def set_target_position(self, target_pos):
|
||||
super(PIDController, self).set_target_position(target_pos)
|
||||
self.mode = 'combined'
|
||||
self.e_angle_old = 0.0
|
||||
self.e_pos_old = 0.0
|
||||
x_pred = self.get_measurement(robot.id)
|
||||
|
||||
self.i = 0.0
|
||||
self.i_angle = 0.0
|
||||
self.i_pos = 0.0
|
||||
if x_pred is not None:
|
||||
error_pos = np.linalg.norm(x_pred[0:2] - target_pos[0:2])
|
||||
angles_unwrapped = np.unwrap([x_pred[2], target_pos[2]]) # unwrap angle to avoid jump in data
|
||||
error_ang = np.abs(angles_unwrapped[0] - angles_unwrapped[1])
|
||||
# print("error pos = ", error_pos)
|
||||
# print("error_pos = {}, error_ang = {}".format(error_pos, error_ang))
|
||||
|
||||
def compute_control(self, state):
|
||||
# measure state
|
||||
x_pred = state[1:]
|
||||
# if error_pos > 0.075 or error_ang > 0.35:
|
||||
if error_pos > 0.05 or error_ang > 0.1:
|
||||
# solve mpc open loop problem
|
||||
res = self.ols.solve(x_pred, target_pos)
|
||||
|
||||
if self.t is None:
|
||||
dt = 0.1
|
||||
# us1 = res[0]
|
||||
# us2 = res[1]
|
||||
us1 = res[0] * self.control_scaling
|
||||
us2 = res[1] * self.control_scaling
|
||||
# print("u = {}", (us1, us2))
|
||||
|
||||
# print("---------------- mpc solution took {} seconds".format(tmpc_end - tmpc_start))
|
||||
dt_mpc = time.time() - self.t
|
||||
if dt_mpc < self.dt: # wait until next control can be applied
|
||||
# print("sleeping for {} seconds...".format(self.dt - dt_mpc))
|
||||
time.sleep(self.dt - dt_mpc)
|
||||
else:
|
||||
dt = time.time() - self.t
|
||||
us1 = [0] * self.mstep
|
||||
us2 = [0] * self.mstep
|
||||
near_target += 1
|
||||
|
||||
# send controls to the robot
|
||||
for i in range(0, self.mstep): # option to use multistep mpc if len(range) > 1
|
||||
u1 = us1[i]
|
||||
u2 = us2[i]
|
||||
robot.send_cmd(u1, u2)
|
||||
if i < self.mstep:
|
||||
time.sleep(self.dt)
|
||||
self.t = time.time() # save time the most recent control was applied
|
||||
else:
|
||||
print("robot not detected yet!")
|
||||
|
||||
def interactive_control(self, robots):
|
||||
controlled_robot_number = 0
|
||||
robot = robots[controlled_robot_number]
|
||||
|
||||
ts = []
|
||||
angles = []
|
||||
|
||||
target_pos = np.array([0.0, 0.0, 0.0])
|
||||
e_angle_old = 0.0
|
||||
e_pos_old = 0.0
|
||||
|
||||
i = 0.0
|
||||
i_angle = 0.0
|
||||
i_pos = 0.0
|
||||
|
||||
t0 = time.time()
|
||||
|
||||
running = True
|
||||
while running:
|
||||
# handle events from opencv window
|
||||
while not self.estimator.event_queue.empty():
|
||||
event = self.estimator.event_queue.get()
|
||||
print("event: ", event)
|
||||
if event[0] == 'click':
|
||||
target_pos = event[1]
|
||||
i_angle = 0
|
||||
i_pos = 0
|
||||
e_pos_old = 0
|
||||
e_angle_old = 0
|
||||
self.mode = 'combined'
|
||||
elif event[0] == 'key':
|
||||
key = event[1]
|
||||
|
||||
if key == 32: # arrow up
|
||||
self.controlling = not self.controlling
|
||||
if not self.controlling:
|
||||
print("disable control")
|
||||
robot.send_cmd() # stop robot
|
||||
self.mode = None # reset control mode
|
||||
else:
|
||||
print("enable control")
|
||||
i = 0
|
||||
self.t = time.time()
|
||||
elif key == 48: # 0
|
||||
target_pos = np.array([0.0, 0.0, 0.0]) # TODO: use center of board for target pos
|
||||
elif key == 97: # a
|
||||
self.mode = 'angle'
|
||||
e_angle_old = 0
|
||||
i = 0
|
||||
self.t = time.time()
|
||||
elif key == 99: # c
|
||||
self.mode = 'combined'
|
||||
e_angle_old = 0
|
||||
e_pos_old = 0
|
||||
i_angle = 0
|
||||
i_pos = 0
|
||||
self.t = time.time()
|
||||
elif key == 112: # p
|
||||
self.mode = 'position'
|
||||
e_pos_old = 0
|
||||
i = 0
|
||||
self.t = time.time()
|
||||
elif key == 43: # +
|
||||
self.P_pos += 0.1
|
||||
print("P = ", self.P_angle)
|
||||
elif key == 45: # -
|
||||
self.P_pos -= 0.1
|
||||
print("P = ", self.P_angle)
|
||||
elif key == 9: # TAB
|
||||
# switch controlled robot
|
||||
robot.send_cmd() # stop current robot
|
||||
controlled_robot_number = (controlled_robot_number + 1) % len(robots)
|
||||
robot = robots[controlled_robot_number]
|
||||
print(f"controlled robot: {robot.id}")
|
||||
elif key == 113 or key == 27: # q or ESCAPE
|
||||
print("quit!")
|
||||
self.controlling = False
|
||||
robot.send_cmd()
|
||||
return
|
||||
|
||||
if self.controlling:
|
||||
# measure state
|
||||
x_pred = self.get_measurement(robot.id)
|
||||
dt = self.t - time.time()
|
||||
|
||||
|
||||
|
||||
#print(f"x_pred = {x_pred}\ntarget = {target_pos}\nerror = {np.linalg.norm(target_pos - x_pred)}\n")
|
||||
if self.mode == 'angle':
|
||||
# compute angle such that robot faces to target point
|
||||
target_angle = self.target_pos[2]
|
||||
target_angle = target_pos[2]
|
||||
|
||||
ts.append(time.time() - t0)
|
||||
angles.append(x_pred[2])
|
||||
|
||||
angles_unwrapped = np.unwrap([x_pred[2], target_angle]) # unwrap angle to avoid jump in data
|
||||
|
||||
e_angle = angles_unwrapped[0] - angles_unwrapped[1] # angle difference
|
||||
p = self.P_angle * e_angle
|
||||
self.i += self.I_angle * dt * (e_angle + self.e_angle_old)/2.0 # trapezoidal rule
|
||||
d = self.D_angle * (e_angle - self.e_angle_old)/dt
|
||||
# i += self.I * dt * e # right Riemann sum
|
||||
i += self.I_angle * dt * (e_angle + e_angle_old)/2.0 # trapezoidal rule
|
||||
d = self.D_angle * (e_angle - e_angle_old)/dt
|
||||
|
||||
u1 = p + self.i + d
|
||||
u1 = p - i - d
|
||||
u2 = - u1
|
||||
|
||||
self.e_angle_old = e_angle
|
||||
e_angle_old = e_angle
|
||||
|
||||
elif self.mode == 'combined':
|
||||
# compute angle such that robot faces to target point
|
||||
v = self.target_pos[0:2] - x_pred[0:2]
|
||||
v = target_pos[0:2] - x_pred[0:2]
|
||||
target_angle = math.atan2(v[1], v[0])
|
||||
|
||||
angles_unwrapped = np.unwrap([x_pred[2], target_angle]) # unwrap angle to avoid jump in data
|
||||
|
|
@ -76,10 +219,10 @@ class PIDController(ControllerBase):
|
|||
|
||||
if e_pos < 0.05:
|
||||
self.mode = 'angle'
|
||||
self.e_angle_old = 0
|
||||
self.e_pos_old = 0
|
||||
self.i_angle = 0
|
||||
self.i_pos = 0
|
||||
e_angle_old = 0
|
||||
e_pos_old = 0
|
||||
i_angle = 0
|
||||
i_pos = 0
|
||||
u1 = 0
|
||||
u2 = 0
|
||||
else:
|
||||
|
|
@ -92,25 +235,33 @@ class PIDController(ControllerBase):
|
|||
e_angle += np.pi
|
||||
|
||||
p_angle = self.P_angle * e_angle
|
||||
self.i_angle += self.I_angle * dt * (e_angle + self.e_angle_old) / 2.0 # trapezoidal rule
|
||||
d_angle = self.D_angle * (e_angle - self.e_angle_old) / dt
|
||||
i_angle += self.I_angle * dt * (e_angle + e_angle_old) / 2.0 # trapezoidal rule
|
||||
d_angle = self.D_angle * (e_angle - e_angle_old) / dt
|
||||
|
||||
p_pos = self.P_pos * e_pos
|
||||
self.i_pos += self.I_pos * dt * (e_pos + self.e_pos_old) / 2.0 # trapezoidal rule
|
||||
d_pos = self.D_pos * (e_pos - self.e_pos_old) / dt
|
||||
i_pos += self.I_pos * dt * (e_pos + e_pos_old) / 2.0 # trapezoidal rule
|
||||
d_pos = self.D_pos * (e_pos - e_pos_old) / dt
|
||||
|
||||
if forward:
|
||||
u1 = p_angle + p_pos + self.i_angle + self.i_pos + d_angle + d_pos
|
||||
u2 = - p_angle + p_pos - self.i_angle + self.i_pos - d_angle + d_pos
|
||||
print("forward")
|
||||
u1 = p_angle + p_pos - i_angle - i_pos - d_angle - d_pos
|
||||
u2 = - p_angle + p_pos + i_angle - i_pos + d_angle - d_pos
|
||||
else:
|
||||
u1 = p_angle - p_pos + self.i_angle - self.i_pos + d_angle - d_pos
|
||||
u2 = - p_angle - p_pos - self.i_angle - self.i_pos - d_angle - d_pos
|
||||
print("backward")
|
||||
u1 = p_angle - p_pos - i_angle + i_pos - d_angle + d_pos
|
||||
u2 = - p_angle - p_pos + i_angle + i_pos + d_angle + d_pos
|
||||
|
||||
self.e_pos_old = e_pos
|
||||
self.e_angle_old = e_angle
|
||||
e_pos_old = e_pos
|
||||
e_angle_old = e_angle
|
||||
|
||||
else:
|
||||
u1 = 0.0
|
||||
u2 = 0.0
|
||||
#print(f"u = ({u1}, {u2})")
|
||||
robot.send_cmd(u1, u2)
|
||||
self.t = time.time() # save time when the most recent control was applied
|
||||
return u1, u2
|
||||
time.sleep(0.1)
|
||||
|
||||
|
||||
def get_measurement(self, robot_id):
|
||||
return self.estimator.get_robot_state_estimate(robot_id)
|
||||
|
|
|
|||
|
|
@ -1,19 +1,12 @@
|
|||
import socket
|
||||
import threading
|
||||
import json
|
||||
|
||||
|
||||
class Robot:
|
||||
def __init__(self, marker_id, ip, measurement_server=('127.0.0.1', 42424)):
|
||||
def __init__(self, marker_id, ip):
|
||||
self.id = marker_id
|
||||
|
||||
self.t_last_measurement = None
|
||||
self.x = None
|
||||
self.y = None
|
||||
self.angle = None
|
||||
self.pos = None
|
||||
self.euler = None
|
||||
|
||||
self.ip = ip
|
||||
self.port = 1234
|
||||
self.socket = socket.socket()
|
||||
|
||||
# currently active control
|
||||
|
|
@ -22,47 +15,18 @@ class Robot:
|
|||
|
||||
self.connected = False
|
||||
|
||||
self.measurement_server = measurement_server
|
||||
self.measurement_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # TCP socket
|
||||
self.measurement_thread = threading.Thread(target=self.receive_measurements)
|
||||
# mark thread as daemon -> it terminates automatically when program shuts down
|
||||
self.measurement_thread.daemon = True
|
||||
self.receiving = False
|
||||
|
||||
def connect(self):
|
||||
# connect to robot
|
||||
try:
|
||||
print(f"connecting to robot {self.ip} at {self.ip}:{self.port} ...")
|
||||
self.socket.connect((self.ip, self.port)) # connect to robot
|
||||
print("connecting to robot {} with ip {} ...".format(self.id, self.ip))
|
||||
self.socket.connect((self.ip, 1234)) # connect to robot
|
||||
print("connected!")
|
||||
self.connected = True
|
||||
except socket.error:
|
||||
print(f"error: could not connect to robot {self.id} at {self.ip}:{self.port}")
|
||||
|
||||
# connect to measurement server
|
||||
print(f"connecting to measurement server on {self.measurement_server} ...")
|
||||
|
||||
try:
|
||||
self.measurement_socket.connect(self.measurement_server)
|
||||
self.measurement_socket.sendall(f"{self.id}\n".encode())
|
||||
|
||||
self.measurement_socket.settimeout(0.1)
|
||||
# check if we receive data from the measurement server
|
||||
response = self.measurement_socket.recv(1024)
|
||||
if 'error' not in str(response):
|
||||
print("... connected! -> start listening for measurements")
|
||||
self.measurement_socket.settimeout(None)
|
||||
# if so we start the measurement thread
|
||||
self.measurement_thread.start()
|
||||
else:
|
||||
print(f"error: cannot communicate with the measurement server.\n The response was: {response}")
|
||||
except socket.timeout:
|
||||
print(f"error: the measurement server did not respond with data.")
|
||||
except ConnectionRefusedError:
|
||||
print(f"error: could not connect to measurement server at {self.measurement_server}.")
|
||||
print("could not connect to robot {} with ip {}".format(self.id, self.ip))
|
||||
|
||||
def send_cmd(self, u1=0.0, u2=0.0):
|
||||
if self.socket and self.connected:
|
||||
if self.socket:
|
||||
try:
|
||||
self.socket.send(f'({u1},{u2})\n'.encode())
|
||||
except BrokenPipeError:
|
||||
|
|
@ -71,60 +35,3 @@ class Robot:
|
|||
except ConnectionResetError:
|
||||
print(f"error: connection to robot {self.id} with ip {self.ip} lost")
|
||||
pass
|
||||
else:
|
||||
print(f"error: robot {self.id} is not connected to {self.ip}")
|
||||
|
||||
def receive_measurements(self):
|
||||
self.receiving = True
|
||||
while self.receiving:
|
||||
received = str(self.measurement_socket.recv(1024), "utf-8")
|
||||
if len(received) > 0:
|
||||
last_received = received.split('\n')[-2]
|
||||
measurement = json.loads(last_received)
|
||||
self.t_last_measurement = measurement['t']
|
||||
self.x = measurement['x']
|
||||
self.y = measurement['y']
|
||||
self.angle = measurement['angle']
|
||||
else:
|
||||
self.receiving = False
|
||||
print(f"measurement server stopped sending data for robot {self.id}")
|
||||
|
||||
def get_measurement(self):
|
||||
return self.t_last_measurement, self.x, self.y, self.angle
|
||||
|
||||
def __str__(self):
|
||||
connection_state = '' if self.connected else 'not'
|
||||
state = self.get_measurement()
|
||||
last_measurement = f'last measurement = {state}' if None not in state else 'no measurements available'
|
||||
return f"Robot {self.id}: ip = {self.ip}:{self.port} ({connection_state} connected) " + last_measurement
|
||||
|
||||
def __repr__(self):
|
||||
return str(self)
|
||||
|
||||
|
||||
class ControlledRobot(Robot):
|
||||
def __init__(self, marker_id, ip):
|
||||
super().__init__(marker_id, ip)
|
||||
self.controller = None
|
||||
|
||||
def start_control(self):
|
||||
if self.controller is not None:
|
||||
self.controller.start()
|
||||
else:
|
||||
raise Exception("Error: Cannot start control: there is not controller attached to the robot!")
|
||||
|
||||
def stop_control(self):
|
||||
if self.controller is not None:
|
||||
self.controller.stop()
|
||||
else:
|
||||
raise Exception("Error: Cannot stop control: there is not controller attached to the robot!")
|
||||
|
||||
def attach_controller(self, controller):
|
||||
self.controller = controller
|
||||
self.controller.attach_robot(self)
|
||||
|
||||
def move_to_pos(self, target_pos):
|
||||
if self.controller is not None:
|
||||
self.controller.set_target_position(target_pos)
|
||||
else:
|
||||
raise Exception("Error: Cannot move to position: there is not controller attached to the robot!")
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user