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2017-10-17 16:40:05 -0500 | commented question | Actionlib across multiple computers Yeah it is... I think the problem may be with sim time. |
2017-10-06 11:54:07 -0500 | commented question | Actionlib across multiple computers Yes, the message is sent when using RVIZ. Something I noticed: the actionlib script does not work when use_sim_time = tr |
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2017-10-05 21:16:06 -0500 | commented question | Actionlib across multiple computers Those two topics do not echo anything. This is also true for the path topics. I get a 'no messages recieved and simulate |
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2017-10-05 14:54:51 -0500 | commented question | Actionlib across multiple computers Yeah those are all working. I can run nodes on one computer and echo the topics on the other, so I think they're configu |
2017-10-05 12:58:06 -0500 | asked a question | Actionlib across multiple computers Actionlib across multiple computers I'm working on a project where I need to separate out my simulator and navigation no |
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2016-11-21 11:41:07 -0500 | commented question | Return data from a callback function for use in a different function Okay I think that makes sense, thank you! |
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2016-11-19 18:43:22 -0500 | commented question | Return data from a callback function for use in a different function Thanks for the comments. |
2016-11-18 16:33:30 -0500 | asked a question | Return data from a callback function for use in a different function I am trying to use ROS to control many different robots in a swarm simulation. I need to have access to all of the robots position and velocity. I am using the MORSE simulator, which publishes the position and velocity of each of the robots. What I need my function to do (Python) is to take all of those pieces of data and organizes it so that I can use it for my controller. What I have so far: So I created a robot class which has the function get_pose. I would like get_pose to return the position (right now just the x position) from the topic so that it can be used within the move_feature class. So, in the move_feature, I should just be able to call pose with the position topic and have it return the current position. I will eventually need it to expand to 100 robots, so organization is very important. Right now, the function does not return the x_value at all... it just returns information about the subscriber. Is this the right way to try to solve this problem? Thanks in advance! |
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2016-10-31 15:09:50 -0500 | commented question | Move base publishing incorrect cmd_vel Yeah I probably should have specified that in my question. Move_base does only work for 2D navigation, but I think that's ok for my system since the input to the controller is 2D. I just need the navigation portion to be in 2D... but I suppose there could be a problem with the odometry. |
2016-10-31 12:44:11 -0500 | asked a question | Move base publishing incorrect cmd_vel Hi everyone, For research I use the MORSE simulator platform with ROS as middleware. Things have generally been working out well, but I seem to have run into problems controlling the robot autonomously. I am specifying a waypoint for the robot to fly to, and my hope is that the robot will path plan and fly to the position. Move_base was working very well for me when I was using a simple ATRV type robot, but I want to use it for a dynamically correct quadrotor. The quadrotor controller takes in a velocity and yaw command and then the controller takes care of the dynamics from there. Move_base should publish these velocity commands, which is why I think that it should work well with my setup. The problem: when I use move_base the published velocity is very incorrect. cmd_vel is only publishing a yaw rate, but generally no linear velocities. Again, the setup used was very similar for a robot which received correct cmd_vel, so I'm struggling to understand why move_base is not publishing the correct velocities. move_base launch file: <launch> </launch> common_costmap_params: base_local_planner params: (more) |
2016-07-21 12:17:18 -0500 | asked a question | Slam_Gmapping will not run with an increased simulator time (Morse Simulator) I am currently running ros indigo on Ubuntu 14.04. I also use the robotics Simulator MORSE with ROS as middleware. For my simulations I have the robot (quadrotor) fly through the MORSE environment, and use ROS nodes to scan the environment and record the occupancy grid data. I use gmapping (rosrun gmapping slam_gmapping scan:=/base_scan _odom_frame:=/odom) for my laser scanning/mapping. Everything was working fine, I could fly the robot manually, give a goal via RVIZ, write python scripts for waypoints, ect. The problem: The simulations I run take quite a while to run, so I am now speeding up the simulation in MORSE and would like ROS to record the data appropriately. Running gmapping will now not work when I increase the simulation time. No error messages are really given, gmapping will simply not run, which makes my launch files not run either. I believe the problem is with time, as gmapping probably needs to have a parameter added to it to make sure it is properly synced with MORSE. My launch files for reference: Launch file1: Launch file 2: Any suggestions would be very helpful, thanks! |