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Unable to go straight ahead with move_base

asked 2018-05-15 12:12:35 -0500

pl.guhur gravatar image

Our robot is just turning on itself, whatever we ask it. It is heavy and has an important inertia.

However, the turning direction keeps to be the same. We wonder why it does not go straight ahead.

Here is the launch file:

  <node pkg="move_base" type="move_base" respawn="false" name="move_base" output="screen">
    <param name="base_local_planner" value="base_local_planner/TrajectoryPlannerROS" />
    <rosparam file="$(find mv_fiveco)/param/costmap_common_params.yaml" command="load" ns="global_costmap" />
    <rosparam file="$(find mv_fiveco)/param/costmap_common_params.yaml" command="load" ns="local_costmap" />
    <rosparam file="$(find mv_fiveco)/param/local_costmap_params.yaml" command="load" />
    <rosparam file="$(find mv_fiveco)/param/global_costmap_params.yaml" command="load" />
    <rosparam file="$(find mv_fiveco)/param/base_local_planner_params.yaml" command="load" />

Here is base_local_planner_params.yaml :

controller_frequency: 2.0  


# Robot Configuration Parameters
  max_vel_x: 0.06
  min_vel_x: 0.01 # forward
  max_vel_theta: 0.02
  min_vel_theta: -0.02
  min_in_place_vel_theta: 0.01

  acc_lim_theta: 0.005
  acc_lim_x: 0.01
  acc_lim_y: 0.0

  holonomic_robot: false

# Goal Tolerance Parameters
  yaw_goal_tolerance: 0.3
  xy_goal_tolerance: 0.5
  latch_xy_goal_tolerance: true

  meter_scoring: true

Here is costmap_common_params.yaml:

footprint: [[-0.65, -0.33], [-0.65, 0.33], [0.65, 0.33], [0.65, -0.33]]
obstacle_range: 1.5
raytrace_range: 2.0
inflation_radius: 0.45
robot_base_frame: base_footprint
width: 20
height: 20
resolution: 0.05
transform_tolerance: 0.8
observation_sources: scan
scan: {data_type: LaserScan, topic: scan, marking: true, clearing: true}

Here is global_costmap_param.yaml:

  global_frame: /map
  robot_base_frame: /base_footprint
  update_frequency: 1.5
  publish_frequency: 1.0
  static_map: true
  transform_tolerance: 1.0
  resolution: 0.1

Here is local_costmap_param.yaml:

  global_frame: odom
  robot_base_frame: base_footprint
  update_frequency: 1.5
  publish_frequency: 1.0
  static_map: false
  rolling_window: true
  width: 6.0
  height: 6.0

Here is a bagfile.

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Can you view the /cmd_vel topic using rostopic echo /cmd_vel to find out what commands are being given to the robot. You may need to add update the topic name to match that of your robot.

PeteBlackerThe3rd gravatar image PeteBlackerThe3rd  ( 2018-05-15 12:16:40 -0500 )edit

Any particular reason you're using TrajectoryPlannerROS?

David Lu gravatar image David Lu  ( 2018-05-15 13:39:25 -0500 )edit

/cmd_vel showed only rotation and translation.

pl.guhur gravatar image pl.guhur  ( 2018-05-16 01:59:32 -0500 )edit

1 Answer

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answered 2018-05-16 02:00:52 -0500

pl.guhur gravatar image

Thanks to @David Lu, we look over another TrajectoryPlanner. DWA brings us what we expected.

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Asked: 2018-05-15 12:12:35 -0500

Seen: 238 times

Last updated: May 16 '18