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Volume 21 Issue 05/06 - Publication Date: 1 May 2002
 
Nonholonomy on Purpose
 
Nonholonomic Motion Planning for Coupled Planar Rigid Bodies with Passive Revolute Joints
 
Naoji Shiroma Robotics Research Group Department of Engineering Science University of Oxford Parks Road, Oxford, OX1 3PJ, UK , Hirohiko Arai and Kazuo Tanie Intelligent Systems Institute National Institute of Advanced Industrial Science and Technology AIST Tsukuba East, Namiki 1-2-1 Tsukuba, Ibaraki 305-8564, Japan
 
Motion planning for coupled rigid bodies in a horizontal plane is investigated. The rigid bodies are serially connected by passive revolute joints. The dynamic constraints on the system are second-order nonholonomic constraints. We attempted to control those n coupled rigid bodies by the translational acceleration inputs at the first joint. If each rigid body is hinged at the center of percussion, it is possible to compose a positioning trajectory by connecting rotational and translational trajectory segments. Each rigid body can be rotated about its center of percussion one after another. When all of the rigid bodies are aligned on a straight line, they can be translated. The algorithm for positioning is presented. Simulations show that the coupled planar rigid bodies can reach the desired configuration by the constructed inputs.
 
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