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2016-09-27 10:39:36 -0500 | commented question | Implimenting odometry on a real tutlebot I have edited the description. Sorry for being so broad and vague. |
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2016-09-26 17:03:31 -0500 | asked a question | Implimenting odometry on a real tutlebot I wrote the following code to navigate my robot in a square using odometry. The objective for the code is use 4 goal positions(the 4 corners of a square) and navigating to it, by first making sure it is lined up(using odometry and goal positions) and then move using a linear twist if it is lined up. The process repeats 4 times to navigate a square. In simulation(rviz) the code works and i can see the robot trying to implement the algorithm. However, on a real turtlebot, the code is being implimented but the robot barely or hardly moves from its position. I have checked that the kobuki base works, by implementing a simple code.. Any suggestions or ideas.I really need urgent help and am open to any suggestions you may have. (more) |
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2016-06-06 10:12:49 -0500 | commented answer | How to move turtlebot for a certain pre-defined distance Broken link |
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2016-06-03 13:06:36 -0500 | asked a question | Turtlebot does not publish velocity node. The bot doesnt move I am new to ROS and am following tutorials.Everything has worked perfectly fine till the turtlebot bringup. However when I am running a simple python code to draw a square(see below) import rospy from geometry_msgs.msg import Twist from math import radians class DrawASquare(): if __name__ == '__main__': try: DrawASquare() except: rospy.loginfo("node terminated.") the terminal is giving me the output correct output [INFO] [WallTime: 1464972316.780542] Going Straight [INFO] [WallTime: 1464972320.780868] Turning [INFO] [WallTime: 1464972323.180919] Going Straight ^C[INFO] [WallTime: 1464972326.380775] Stop Drawing [INFO] [WallTime: 1464972328.126076] Turning ^Cturtlebot@turtlebot1:~/turtlebot$ python draw_a_square.py [INFO] [WallTime: 1464974923.646459] Going Straight [INFO] [WallTime: 1464974927.646840] Turning [INFO] [WallTime: 1464974930.046803] Going Straight [INFO] [WallTime: 1464974934.046856] Turning [INFO] [WallTime: 1464974936.446891] Going Straight [INFO] [WallTime: 1464974940.446869] Turning [INFO] [WallTime: 1464974942.846905] Going Straight [INFO] [WallTime: 1464974946.846854] Turning [INFO] [WallTime: 1464974949.246856] TurtleBot should be close to the original starting position (but it's probably way off) [INFO] [WallTime: 1464974949.247515] Going Straight [INFO] [WallTime: 1464974953.246847] Turning [INFO] [WallTime: 1464974955.647318] Stop Drawing turtlebot@turtlebot1:~/turtlebot$ python draw_a_square.py [INFO] [WallTime: 1464974985.363926] Going Straight [INFO] [WallTime: 1464974989.364275] Turning [INFO] [WallTime: 1464974991.764251] Going Straight [INFO] [WallTime: 1464974995.764257] Turning [INFO] [WallTime: 1464974998.164311] Going Straight [INFO] [WallTime: 1464975002.164276] Turning [INFO] [WallTime: 1464975004.564348] Going Straight [INFO] [WallTime: 1464975008.564305] Turning [INFO] [WallTime: 1464975010.964148] TurtleBot should be close to the original starting position (but it's probably way off) [INFO] [WallTime: 1464975010.964686] Going Straight [INFO] [WallTime: 1464975014.964331] Turning [INFO] [WallTime: 1464975017.364785] Stop Drawing turtlebot@turtlebot1:~/turtlebot$ python draw_a_square.py [INFO] [WallTime: 1464975280.145368] Going Straight [INFO] [WallTime: 1464975284.145799] Turning [INFO ... (more) |
2016-05-20 19:11:47 -0500 | asked a question | Using odometry output to draw a square I am new to ROS, so it is very possible that I am missing something very basic. I am trying to make my robot draw an accurate square with the use of odometry information. For starters, I am following ( http://wiki.ros.org/navigation/Tutori... ). I have managed to complete 2.2(TF) and believe that I dont need 2.3(Laser Scanner for using odometry). I have managed to use this(http://wiki.ros.org/evarobot_odometry/Tutorials/indigo/Writing%20a%20Simple%20Subscriber%20for%20Odometry) tutorial to subscribe to the odometry information and have completed 2.4(Odometry). However, my robot is currently not moving since I have not published any velocity Twist and I dont know how to inetgrate odometry with velocity twist. I have tried following ( http://answers.ros.org/question/20536... ), but it isnt very helpful. I would really appreciate any help any guidance anyone can provide. Thanks in advance, |
2016-05-20 19:11:46 -0500 | answered a question | Navigation of turtlebot (Moving 1m forward, 1m left) Did anybody figure this out? |
2016-05-20 15:04:19 -0500 | commented answer | TurtleBot ROS moving using Twist Link broken |