OpenMR: Modular Robots plug-in for Openrave

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Simulating the locomotion of the Minicube-I modular robot (click to enlarge)

Introduction

OpenMR is an OpenRave Modular Robots plug-in for simulating the locomotion of modular robots.

Hierarchy of Controllers

Hierarchy of controllers in OpenMR

The controllers are hierarchical. At the lowest level there are the controllers that interact directly with the joints, seting their current torque, position or velocity. Typicall level 0 controllers are: P, PD, PID...

Level 1 controllers set the sequence of reference signals for the level 0 controller in order for the robot to move. Examples of this kind of controllers are gait control tables, sinusoidal generators, central patter generators, neural controllers and so on.

Level 0 controller

Currently there is only one level 0 controller in charge of setting the joint's reference positions.

Servo controller

This controller implements standard servos, which are controlled by setting its reference position. Internally It has a P controller

  • API
setpos s1 [s2] Set the reference position of all the robot joints, in degrees, in the range [-90,90]. If the robot have N joints, there have to be N arguments.
setpos1 servo pos Set the reference position of one joint. The argument servo is the servo number, starting from 0. The argument pos is the reference position (in degrees) [-90,90]

Level 1

  • Neuralcontroller
  • Generic controller
  • Harmonic controller
  • Sinusoidal controller
  • Others...

Installation and setup

Running the Examples

Videos

300|250</youtube>

Locomotion of the Minicube-I modular robot
Direct link to the video in Youtube

Mailing list

Repository

svn co http://svn.iearobotics.com/openmr/trunk  openmr

License

150px This code is under the GPLv3 license

Author

Juan Gonzalez-Gomez

Links

News

  • 2010/03/08: This page is started