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Tag Archives: ROS
Slerp: Spherical linear interpolation in quaternion space
in my previous post, I explained the simple Lerp method for calculating linear interpolation in the quaternion space. I also mentioned that while normalizing the output could help to get an optimized result, the velocity curve is not constant. To … Continue reading
Posted in Linux, Machine Learning, MATLAB, Optimization, programming, Robotics, ROS, Software, Ubuntu, Uncategorized
Tagged 3d, 4D, code, easy, example, geometry, interpolation, lerp, lie group, linear, math, mathematics, Matlab, orientation, quaternion, robot, Robotics, ROS, rotation, simple, slerp, source code, step by step, tutorial
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Playing with UWSim in ROS. Part. 2: Commanding the AUV
Check the previous post (part. 1) first. In order to move the AUV along the different axes you need to use the node, ‘setVehiclePosition’ inside the ‘UWSim’ package through topic ‘/dataNavigator’. It needs 6 arguments X Y Z roll pitch … Continue reading
Playing with UWSim in ROS – Part. 1 : Running UWSim
You need to have ROS installed on your ubuntu (here I have ubuntu 12.04, ROS fuerte) Download and Install UWSim using information from this link. Open a Terminal in ubuntu (ctrl+alt+T): and source the workspace first: & source ~/fuerte_workspace/setup.bash for … Continue reading
Add a new dependency to a package in ROS
to add a new dependency to a package you need to open the manifest file and add your dependency. For example we add the ‘rospy’ dependency to a manifest (red): <package> <description brief=”beginner_tutorials”> beginner_tutorials </description> <author>ML</author> <license>BSD</license> <review status=”unreviewed” notes=””/> … Continue reading
how to solve the error: “no ROS_WORKSPACE set”
it happens when you didn’t source the setup file of ros, then you need just to know the workspace directory, and run this line of command: source ~/fuerte_workspace/setup.sh (my workspace directory is ‘fuerte_workspace’)
Check the Environment Variables in ROS
In order to check the Environment Variables in ROS, open a terminal and enter the following command: $ export | grep ROS To check the variables specifically we can do something like this: check the version of ROS: > rosparam … Continue reading
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