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velocity_controllers

This is a collection of controllers that work using the “velocity” joint command interface but may accept different joint-level commands at the controller level, e.g. controlling the velocity on a certain joint to achieve a set position.

The package contains the following controllers:

velocity_controllers/JointGroupVelocityController

This is specialization of the forward_command_controller that works using the “velocity” joint interface.

ROS 2 interface of the controller

Topics

~/commands (input topic) [std_msgs::msg::Float64MultiArray]

Joints’ velocity commands

Parameters

This controller overrides the interface parameter from forward_command_controller, and the joints parameter is the only one that is required.

An example parameter file is given here

controller_manager:
  ros__parameters:
    update_rate: 100  # Hz

    velocity_controller:
      type: velocity_controllers/JointGroupVelocityController

velocity_controller:
  ros__parameters:
    joints:
      - slider_to_cart