Local Planner does not plan through inflated costs?

asked 2013-11-18 23:25:16 -0500

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Hi,

I have a problem with my local planner (base_local_planner).
As you can see on the screenshot, the costmap of the local planner does't take inflated obstacles into account.
But why? Because hitting this inflated area with the side of my robot is possible without having a collision.
Is there some parameter to quickly adjust this behaviour?

Btw: These yellow points in the middle of the grey inflated area are obstacles.

Regards
Max
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Hi Max. A) What distro are you running? B) What is the point cloud/color map in the screenshot showing? (specific topic please)

David Lu ( 2013-11-19 07:57:47 -0500 )edit

That's a point cloud from the base_local_planner: /move_base/TrajectoryPlannerROS/cost_cloud

madmax ( 2013-11-20 21:07:28 -0500 )edit

What is the red polygon and what is the green polygon?

David Lu ( 2013-11-21 02:27:03 -0500 )edit

green polygon is the static footprint, red one is dynamic footprint

madmax ( 2013-11-29 22:58:35 -0500 )edit

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answered 2013-11-19 10:09:31 -0500

sudhanshu_mittal

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updated 2013-12-02 01:42:31 -0500

felix k

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There is ROS package called costmap_2d. The costmap_2d package provides a configurable structure that maintains complete info about all position in the map in the form of a occupancy grid, which helps robot navigate.

Particularly for your problem, there is a parameter called "inflation_radius": default set as 0.55m. I am using ROS fuerte. In my system this parameter is found at: /opt/ros/fuerte/stacks/navigation/costmap_2d/cfg/cpp/costmap_2d/ in Costmap2DConfig.h

For more info, you should refer to the costmap_2d wiki page.

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In detail it is the cost_inscribed parameter.

madmax ( 2013-11-20 21:08:57 -0500 )edit

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answered 2013-12-01 05:14:38 -0500

David Lu

10932 ●123 ●219 ●250 http://MetroRobots.com/

It looks to me like the planner is taking inflated obstacles into account. The lack of colored points around the yellow points indicates that the planner is not even considering driving there.

If you are having problems not indicated in the screenshot (like collisions in planning) then there is a separate problem with the planner.

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Local Planner does not plan through inflated costs?

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