Qt_Yeung's profile - activity

rospy.service.ServiceException: transport error Hi, we have just recently updated our system to these versions: franka

When my own controller was switched to another controller effort_controllers/JointTrajectoryController, it was successfu

You could search Visp library which provides ROS interface, its link is http://visp.inria.fr/

yes, it did work. You can find ros interface for visp library.

I interpolate straight line with compute_cartesian_path(), but the calculated joint accelerations are very big even if I modify the jump_threshold value, do you know how to improve it?

Hi all, since i have initialized my Schunk 7-DOF arm, i would like to ask , is there any inverse kinematics library to control this manipulator? PS: Ubuntu 12.04 LTS/FUERTE

Thanks!

Yes, my TF tree is not correct at first, you should check your tf tree, maybe this can help.

I used MoveIt! library, you can try it link text.

I used MoveIt! library, you can try it http://moveit.ros.org .

Hi,

I am using irobot create2 and kinect2 to create map with gmapping, fake laser scan can be created correctly,but i met a problem now when creating map, this is what i have done:

(1) start irobot driver

roslaunch turtlebot_bringup minimal.launch

(2) start kinect2 driver and depthimage_to_laserscan is also included correctly

roslaunch kinect2_bridge kinect2_bridge.launch publish_tf:=true

(3) run gmapping

rosparam ser use_sim_time true

rosrun gmapping slam_gmapping scan:=scan

(4) start rviz

rosrun rviz rviz

It only shows the map of first-sight view, when i move my kinect2, the map doesn't change and laser scan is moving. It outputs like:

[ WARN] : Failed to compute laser pose, aborting initialization (Lookup would require extrapolation into the future. Requested time 1443169289.383570176 but the latest data is at time 1443169289.318866014, when looking up transform from frame [map] to frame [base_link]) -maxUrange 9.99 -maxUrange 9.99 -sigma 0.05 -kernelSize 1 -lstep 0.05 -lobsGain 3 -astep 0.05 -srr 0.1 -srt 0.2 -str 0.1 -stt 0.2 -linearUpdate 1 -angularUpdate 0.5 -resampleThreshold 0.5 -xmin -100 -xmax 100 -ymin -100 -ymax 100 -delta 0.05 -particles 30 update frame 0 update ld=0 ad=0 Laser Pose= 0 0 -0.00514984 m_count 0 Registering First Scan

yes, i have done this before, but i didn't find brics_actuator in cob_common.

Hi all,

i didn't find brics_actuator package in ROS indigo, did anyone know where is the new version for this package?

Thanks!

Regards, Quantao

Hi all,

i have the velocity topic /cmd_vel, and it's the type geometry_msgs::Twist, it is given in the object reference frame, and now i need to transform the velocity to another frame, such as my robot's base frame. How can i do that, if i know the translation and rotation between the two frames?

I think it is different from position transformation, because velocity is 6 dimension and position only 3.

Does someone have this knowledge? Any help is appreciated.