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Questions tagged [linear-velocity]

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Seeking clarity regarding frame of reference in which robot velocities are provided

I have a very simple doubt. I have a robot with a body frame B attached very rigidly to it. I have a world frame W attached ...
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sending velocity commands to the robot throught cmd_vel topic

Hi, I want to send velocity comands to move th bebop drone up and then forward. Here is my code: ...
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How to compute the Linear/Angular velocity with respect to another frame!

Hi everyone, Am using ROS to get the linear/angular velocity of Bebop drone from the topic \bebop\odom. Most probably the velocities are expressed in the body fixed frame but I want to compute these ...
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What is the meaning of the effort or velocity on urdf model

What is the meaning of these ? () on the urdf model. ı changed limit effort or velocity but nothing changed Originally posted by Mekateng on ROS Answers with karma: 85 on 2017-11-09 Post score: 2
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Publish on a Topic for a certain time

Hi, I would like to know if it is possible to publish on a topic for a certain time (fixed before publishing). For example, I want to publish a linear velocity (geometry_msgs/Twist Message) for 3 ...
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How to control cartesian velocity?

I'm using a Fanuc M10iA robot from the ROS industrial package and I would like to generate a trajectory for this robot from a cartesian path (i.e. a list of cartesian positions and velocities). ...
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turtlebot2 kobuki turns itself off when cmd_velocity > 1

The setup: I currently have 2 turtlebots and a workstation all communicating via multimaster_fkie. The workstation only launches the ...
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odometry message from Arduino

Hello, I am trying to create and publish odometry data for a differential drive robot from an Arduino Due board with the data coming from wheel encoders and a gyro sensor attached to the board. my ...
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listener lookupTwist producting wrong velocity for turns

I'm trying to extract linear velocity from an object's tf frame using lookupTwist. I simulate an object moving around on a 400m track. I used simple line and circle equations to describe its position ...
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Computing Odometry from two velocities

I am looking to determine how to compute odometry for my robot. It is a skid-steer platform with one motor on each side (left/right) and each side reports an RPM which is then turned into a velocity. ...
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How to calculate velocity for a tracked robot

Hi to all, I've built my own skid-steering tracked robot and I wrote a simple ROS node which allows me to control it by using my keyboard. Since I'm using encoders for both motors, I would like to be ...
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DWA Planner gives y velocities although y is set to 0

UPDATE: I checked the DWA Planner wiki page once more and took a look at the subscribed and published topics. I have now discovered a difference between the STAGE simulation and my real robot: The ...
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