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On the Redundant-Drive Backlash-Free Robotic Mechanisms

dc.contributor.authorChang, Sun-Laien_US
dc.contributor.authorTsai, Lung-Wenen_US
dc.description.abstractIn this paper, we introduce a new and innovative concept for the control of backlash in gear-coupled robotic mechanisms. The concept utilizes redundant unidirectional drives to assure positive coupling of gear meshes at all times. Based on this concept, a methodology for the enumeration of admissible redundant-drive backlash-free robotic mechanisms has been established. Some typical two-and three-DOF mechanisms have been sketched. Furthermore, actuator torques have been derived as functions of either joint torques or end-effector dynamic performance requirements. A redundantly driven manipulator has the fail-safe advantage in that, except of the loss of backlash control, it can continue to function when one of its actuators fails. It does not have the compliance problem associated with tendon-driven manipulators. A two-DOF backlash-free experimental arm is currently under construction to demonstrate the principle.<P>en_US
dc.format.extent852035 bytes
dc.relation.ispartofseriesISR; TR 1990-38en_US
dc.subjectIntelligent Servomechanismsen_US
dc.titleOn the Redundant-Drive Backlash-Free Robotic Mechanismsen_US
dc.typeTechnical Reporten_US

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