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Gazebo /ApplyBodyWrench throwing errors

asked 2020-04-06 11:53:10 -0500

felcjo gravatar image

Hi,

I'd like to make a door swivel on a hinge. For that, I thought I would use the ApplyBodyWrench service.

As a test, I modeled a hinge and door in gazebo, and ran this (the reference_point being the pose of the hinge wrt world.

rosservice call gazebo/apply_body_wrench '{body_name: "door::link", reference_frame: "hinge_0_0", reference_point: { x: -2.0155, y: -5.222, z: 3.969 }, wrench: {torque: { x: 0, y: 0, z: -0.5 } }, start_time: 10000000000, duration: 1000000000 }'

This throws an error however:

[ERROR] [1586191146.022060675, 1451.365000000]: wrench defined as [hinge_0_0]:[0.000000 0.000000 0.000000, 0.000000 0.000000 0.500000] --> applied as [link]:[0.000000 0.000000 0.000000, 0.000005 -0.000006 0.500000]

The door simply swivels about its own axis, rather than about the z-axis of the hinge.

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answered 2020-04-24 07:21:31 -0500

Vianne gravatar image

As to the error: According to this answer Gazebo always throws this error when using local reference frames. I'm not sure about a solution for the rotation position problem; you can try fixing the hinge to the world and then fixing the door to the hinge so it can only move in the way you intend it to?

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Asked: 2020-04-06 11:53:10 -0500

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Last updated: Apr 06 '20