Modal control of a hydraulically driven redundant actuated fully parallel mechanism
- 16 September 2015
- journal article
- research article
- Published by SAGE Publications in Journal of Vibration and Control
- Vol. 23 (10), 1585-1592
- https://doi.org/10.1177/1077546315596661
Abstract
In this paper, we consider the problem of modal-space control for the hydraulically driven fully parallel mechanism with actuation redundancy. Firstly, the mechanical-hydraulic interaction system is transformed into modal-space model. Then, independent modal decoupled systems for the redundant mechanism are obtained. According to the eigenvalue frequency characteristics, two types of modal systems – zero eigenvalue modal systems and nonzero ones – naturally result and these systems can be treated separately. For the nonzero eigenvalue modal systems, it is convenient to employ dynamic pressure feedback control to regulate damping. For the zero eigenvalue modal systems, we give a proof to show that they just lie in the null space of the Jacobian of the mechanism, then it is more appropriate to implement force control for this type of modal system. Some simulation results further explain the proposed modal-space control method.Keywords
This publication has 12 references indexed in Scilit:
- Study on dynamic isotropy of a class of symmetric spatial parallel mechanisms with actuation redundancyJournal of Vibration and Control, 2011
- Singularity Elimination of Parallel Mechanism by Redundant ActuationsAdvanced Materials Research, 2011
- Characteristics analysis of joint space inverse mass matrix for the optimal design of a 6-DOF parallel manipulatorMechanism and Machine Theory, 2010
- Generation and application of prestress in redundantly full-actuated parallel manipulatorsMultibody System Dynamics, 2007
- Study of the antagonistic stiffness of parallel manipulators with actuation redundancyMechanism and Machine Theory, 2004
- Dynamics and control of redundantly actuated parallel manipulatorsIEEE/ASME Transactions on Mechatronics, 2003
- Geometric Interpretation of the Derivatives of Parallel Robots’ Jacobian Matrix With Application to Stiffness ControlJournal of Mechanical Design, 2003
- The Stewart platform manipulator: a reviewMechanism and Machine Theory, 2000
- Study of the passive compliance of parallel manipulatorsMechanism and Machine Theory, 1999
- Force redundancy in parallel manipulators: theoretical and practical issuesMechanism and Machine Theory, 1998