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| 2012-11-29 04:54:19 -0500 | asked a question | AMCL problems with gyro on turtlebot Hi! I have a gyro ADXRS613 that it gives me imu/data wrong! As soon as I turn it on, the angular velocity is not properly 0 but oscillates around the 0 and the values of the quaternion increase without the robot moves. If i remove the gyro, AMCL doesn't compute the orientation but update only the linear position. I would like to take the value from odom calculate by encoder (therefor from the topic "/odom"???) to use them to AMCL! How could i do this? |
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| 2012-10-31 00:10:10 -0500 | commented answer | Modify "visualization" for autonomous navigation of turtlebot thanks!! |
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| 2012-10-08 06:04:59 -0500 | asked a question | Modify "visualization" for autonomous navigation of turtlebot Hello! i am using ros electric and i would like to use the navigation and visualization toolbox to implement the autonomous navigation for the turtlebot. In particular i want to reach some preset goals without the click of the mouse on the map in rviz. is it possible to modify directly the visualization stack of ROS? which are the files that rviz uses when i click on the "2d nav goal" and "2d pose estimate" buttons? |
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| 2012-09-25 06:02:50 -0500 | asked a question | Network unstable between Turtlebot and workstation Hello, i have a problem with the wireless connection between Turtlebot and my workstation (Dell XPS with Intel Centrino Wireless 6230, ROS-electric). If i launch the turtlebot_teleop on my workstation the network is stable but if i try to launch something like rviz or image_view the network falls. Initially the bit-rate was 2 Mbit/s while now is about 40 kbit/s without modify nothing. However, the network is always falling. I have tried to change workstation with a old acer and the network was slowly but stable! How can i solve this problem? |
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| 2012-09-18 22:41:36 -0500 | asked a question | use Turtlebot's sensors for obstacle avoidance Hello, what is used of the cliff sensors on turtlebot? Could i employ this four sensors to use them in a algorithm of obstacle avoidance? |
| 2012-09-03 23:04:22 -0500 | answered a question | the problem when running the node rviz http://ros.org/wiki/rviz/Troubleshooting Hi, it's all written in the site! I use, before to run rviz, "export OGRE_RTT_MODE=Copy" and rviz runs! |
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| 2012-07-24 04:16:48 -0500 | commented question | Problems about Turtlebot Camera Network RViz rostopic bw /camera/rgb/image_color subscribed to [/camera/rgb/image_color] ^Caverage: 130.30KB/s mean: 921.66KB min: 921.66KB max: 921.66KB window: 3 |
| 2012-07-24 04:08:51 -0500 | commented question | Problems about Turtlebot Camera Network RViz I just tried again with acer and the delay is 40s, but the network doesn't fall. |
| 2012-07-24 03:58:39 -0500 | commented question | Problems about Turtlebot Camera Network RViz The resolution is 1280*1024 but today i have tried to change workstation (i have used a acer aspire 5920) and the network was slow (delay 2s, acceptable), but don't falls!! On my Dell i have try to change the setting in reconfigure_gui. i have decreased the quality but the network falls always. |
| 2012-07-21 02:24:52 -0500 | asked a question | Problems about Turtlebot Camera Network RViz Hello, i was just that i'm working with ROS and Turtlebot. My configuration is: Workstation: Dell xps (i7 and 8Gb RAM) ubuntu 11.10(64bit, Wubi) Ros electric Netbook (on Turtlebot): Samsung N150 ubuntu 10.04 Ros electric Robot: Turtlebot Camera: Asus Xtion pro live I encountered several problems: 1) If on netbook run turtlebot service i can not send commands by workstation while if i stop the service with sudo service turtlebot stop and launch roslaunch turtlebot_bringup minimal.launch or other on netbook the system works (eg the teleop by the workstation is ok). Why? 2)If i try to start the nodes of the camera on netbook (i try with openni.launch openni_node.launch kinect.launch) i can see the image on my netbook perfectly with commands as: rosrun image_view image_view image:=/camera/rgb/image_color(or mono) or in rviz but on the workstation the images arrive with very delay (about 45s) and after few seconds the network falls. I must reset the network board of the workstation because it no works with any network. The dashboard, when i launch the nodes of the camera on netbook, show this message: [/openni_camera] Number devices connected: 1 INFO [/openni_camera] 1. device on bus 001:04 is a PrimeSense Device (600) from PrimeSense (1d27) with serial id '' INFO [/openni_camera] device_id is not set! Using first device. WARN [/openni_camera] Opened 'PrimeSense Device' on bus 1:4 with serial number '' INFO rgb_frame_id = 'camera_rgb_optical_frame' INFO depth_frame_id = 'camera_depth_optical_frame' INFO but after is totally ok and if i launch rostopic hz /camera... on netbook i get: avarage rate:21.802 min: 0.011s max: 1.410s std dev: 0.10654s window: 169 avarage rate:22.500 min: 0.011s max: 1.410s std dev: 0.09880s window: 197 about once for second instead on workstation i get: average rate: 0.297 min: 3.369s max: 3.369s std dev: 0.00000s window: 2 no new messages no new messages average rate: 0.296 min: 3.369s max: 3.379s std dev: 0.00498s window: 3 no new messages no new messages average rate: 0.300 min: 3.265s max: 3.379s std dev: 0.05116s window: 4 no new messages no new messages average rate: 0.303 min: 3.189s max: 3.379s std dev: 0.07817s window: 5 no new messages no new messages no new messages no new messages... Why? I have tried to exchange the dell xps with the netbook and the images arrive with about 2s of delay (from workstation to netbook) and the visualization is better but the network still falls after few time. What is the problem? I wish i could see on my workstation what the camera on Turtlebot sees when the robot go. How could i do to get this? The network should be set well because the teleop, the rostopic pub(in any direction) and the ping work. 3) When the nodes of the camera are active, on netbook, on rviz(that it works only setting ... |
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