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turtlebot AMCL - waiting on transform from robot1/base_footprint to map to become available, tf error [closed]

asked 2014-06-19 19:05:28 -0500

evangravelle gravatar image

updated 2014-06-19 22:42:17 -0500

fergs gravatar image

I am trying to run amcl under a namespace (we'll call it robot_name) for a single turtlebot, in order to eventually use amcl on multiple robots. I run titianbot.launch first:

<launch> 
<arg name="robot_name" default="titianbot"/>

  <group ns="$(arg robot_name)">

    <param name="tf_prefix" value="$(arg robot_name)" />

    <include file="$(find turtlebot_bringup)/launch/minimal.launch"/>

    <param name="mobile_base/base_frame" value="$(arg robot_name)/base_footprint" />
    <param name="mobile_base/odom_frame" value="$(arg robot_name)/odom" />

  </group>
</launch>

Note the parameter changes to include the namespace prefix. I then run titian_amcl.launch

<launch>
  <arg name="robot_name" default="titianbot"/>

  <!-- MAP SERVER -->
  <arg name="map_file" default="$(find map_server)/maps/theoffice.yaml" />
  <node name="map_server" pkg="map_server" type="map_server" args="$(arg map_file)" />
  <param name="frame_id" value="/map" />

  <group ns="$(arg robot_name)"> 

    <arg name="tf_prefix" value="$(arg robot_name)" />
    <param name="tf_prefix" value="$(arg tf_prefix)" />

    <include file="$(find turtlebot_bringup)/launch/3dsensor.launch">
      <arg name="depth_registration" value="false" />
      <arg name="scan_topic" value="/$(arg robot_name)/scan" />
    </include>

    <!-- AMCL NODE -->
    <arg name="initial_pose_x" default="0.0"/> 
    <arg name="initial_pose_y" default="0.0"/> 
    <arg name="initial_pose_a" default="0.0"/>
    <include file="$(find turtlebot_navigation)/launch/includes/amcl.launch.xml">
      <arg name="initial_pose_x" value="$(arg initial_pose_x)"/>
      <arg name="initial_pose_y" value="$(arg initial_pose_y)"/>
      <arg name="initial_pose_a" value="$(arg initial_pose_a)"/>
    </include>

    <param name="amcl/odom_frame_id" value="$(arg tf_prefix)/odom"/>
    <param name="amcl/base_frame_id" value="$(arg tf_prefix)/base_footprint"/>
    <param name="amcl/global_frame_id" value="/map"/>

    <!-- MOVE_BASE NODE -->
    <include file="$(find turtlebot_navigation)/launch/includes/move_base.launch.xml">
      <arg name="odom_topic" value="/$(arg robot_name)/odom"/>
    </include>

    <param name="move_base/global_costmap/robot_base_frame" value="/$(arg robot_name)/base_footprint" />
    <param name="move_base/local_costmap/robot_base_frame" value="/$(arg robot_name)/base_footprint" /> 

  </group>
</launch>

Note the parameter changes to include the tf_prefix namespace. I get the following error repeated every 5 seconds forever:

 [ WARN] [1403220638.626315765]: Waiting on transform from titianbot/base_footprint to map to become available before running costmap, tf error:

You can see that I attempt to change the relevant parameters to include this "robot_name" prefix. When amcl_demo is run with no namespace, amcl node publishes on 6 topics, and the map-->odom transform is published, however in this version with the namespace, only 4 topics are published, and the transform from map-->robot_name/odom is not published. So it seems like the amcl node isn't fully initializing, though I don't know why.

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Closed for the following reason question is not relevant or outdated by 130s
close date 2015-07-11 13:14:30.107584

Comments

Hi evangravelle, what does your tf tree currently look like? (rosrun tf view_frames)

al-dev gravatar imageal-dev ( 2014-06-20 03:20:08 -0500 )edit

frames.pdf The missing link is from map to titianbot/odom

evangravelle gravatar imageevangravelle ( 2014-06-20 14:29:03 -0500 )edit

Have you looked at http://answers.ros.org/question/41433/multiple-robots-simulation-and-navigation/? the "amcl/odom_frame_id" is not explicitly specified for each robot, he only specifies the tf_prefix inside the <group> tag.

al-dev gravatar imageal-dev ( 2014-06-20 21:33:12 -0500 )edit

did you solve your problem ? I'm struggling on this for a week without finding a way to make it work

marguedas gravatar imagemarguedas ( 2015-04-30 10:10:44 -0500 )edit

Any solutions guys?

Usman Arif gravatar imageUsman Arif ( 2015-11-27 13:01:37 -0500 )edit

1 Answer

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answered 2015-05-29 01:57:32 -0500

snowburnerx gravatar image

I am submitting this as a comment and not an answer because the latest update to indigo (date 5-26-15) seems to have changed the 3D sensor launch config. It seems that the tf frame params set for the 3D sensor, mobile base and the NavPlanner are not resolving correctly.

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Asked: 2014-06-19 19:05:28 -0500

Seen: 1,968 times

Last updated: Jun 19 '14