You're reading the documentation for a development version. For the latest released version, please have a look at Iron.

Release Notes: Iron to Jazzy

This list summarizes the changes between Iron (previous) and Jazzy (current) releases.

admittance_controller

  • Remove robot_description parameter from parameter YAML, because it is not used at all (#963).

diff_drive_controller

  • The twist message on ~/cmd_vel is now required to be of stamped type (#812).

  • Remove unused parameter wheels_per_side (#958).

joint_trajectory_controller

  • Parameter allow_nonzero_velocity_at_trajectory_end is now per default false (#834).

  • Activate update of dynamic parameters (#761 and #849).

  • The parameter start_with_holding is removed, it now always holds the position at activation (#839).

  • Continue with last trajectory-point on success, instead of hold-position from current state (#842).

  • Add console output for tolerance checks (#932):

    [tolerances]: State tolerances failed for joint 2:
[tolerances]: Position Error: 0.020046, Position Tolerance: 0.010000
[trajectory_controllers]: Aborted due goal_time_tolerance exceeding by 1.010000 seconds

  • Goals are now cancelled in on_deactivate transition (#962).

  • Empty trajectory messages are discarded (#902).

  • Action field error_string is now filled with meaningful strings (#887).

  • Angle wraparound behavior (continuous joints) was added from the current state to the first segment of the incoming trajectory (#796).

  • The URDF is now parsed for continuous joints and angle wraparound is automatically activated now (#949). angle_wraparound parameter was completely removed.

  • Tolerances sent with the action goal are now processed and used for the action. (#716). For details, see the JointTolerance message:

    The tolerances specify the amount the position, velocity, and
accelerations can vary from the setpoints.  For example, in the case
of trajectory control, when the actual position varies beyond
(desired position + position tolerance), the trajectory goal may
abort.

There are two special values for tolerances:
 * 0 - The tolerance is unspecified and will remain at whatever the default is
 * -1 - The tolerance is "erased".  If there was a default, the joint will be
        allowed to move without restriction.

pid_controller

  • 🚀 The PID controller was added 🎉 (#434).

steering_controllers_library

  • Changing default int values to double in steering controller’s yaml file. The controllers should now initialize successfully without specifying these parameters (#927).

  • A fix for Ackermann steering odometry was added (#921).

tricycle_controller

  • tricycle_controller now uses generate_parameter_library (#957).