A Dual-Space Feedforward PID Control of Redundantly Actuated Parallel Manipulators with Real-Time Experiments

Guilherme Sartori Natal 1 Ahmed Chemori 2 Micaël Michelin 3 François Pierrot 2
1 LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
2 DEXTER - Conception et commande de robots pour la manipulation
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
3 TECNALIA France
Abstract : This paper deals with dual-space control of R4 redundantly actuated parallel manipulator for very high acceleration applications. This controller consists in a PID in the Cartesian space complied with a feedforward of the desired acceleration in both Cartesian and articular spaces for tracking performance improvements: models show that this "dual-space" control strategy is an e cient way to implement computed torque control. For comparison purposes, experiments were made with a Cartesian PID until 20G. Experimental results show that the proposed control scheme is considerably better than the PID in the Cartesian space, and that a good tracking performance could be achieved even for the very high acceleration of 40G (equivalent to more than 425 pick-and-place cycles per minute).
Keywords : Actuation redundancy robotics Parallel manipulators motion control PID control feedforward
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Conference papers
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Submitted on : Wednesday, August 15, 2012 - 6:57:41 PM
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CNRS | DEXTER | LIRMM | TDS-MACS | MIPS | UNIV-MONTPELLIER

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Guilherme Sartori Natal, Ahmed Chemori, Micaël Michelin, François Pierrot. A Dual-Space Feedforward PID Control of Redundantly Actuated Parallel Manipulators with Real-Time Experiments. PID'12: IFAC Conference on Advances in PID Control, Mar 2012, Brescia, Italy. pp.6. ⟨lirmm-00723937⟩

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