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Motion control for a redundantly actuated parallel electrohydraulic mechanism

  • Harbin Institute of Technology

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, a motion controller for a redundantly actuated parallel electrohydraulic mechanism (RA-PEHM) is developed that includes a position tracking loop and an internal force rejecting loop. Electrohydraulic and rigid body models are built. The structure of internal force space is analyzed. Model-based position control for rigid-body degrees of freedom (DOF) is proposed, using a fast inner force loop to track programming desired generalized forces thereby reproducing desired position. Force control based on real-time solution of the basis of the internal force space for redundant DOF is used to reject internal forces, which are usually caused by some factors, such as inconsistent dynamic behavior of drive units, zero drift of servovalves and measuring error of sensors. Simulation results show the proposed control scheme has good position tracking performance and effectively reduces the internal force simultaneously.

Original languageEnglish
Title of host publicationProceedings of 2015 International Conference on Fluid Power and Mechatronics, FPM 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1019-1023
Number of pages5
ISBN (Electronic)9781479987702
DOIs
StatePublished - 24 Nov 2015
Event7th International Conference on Fluid Power and Mechatronics, FPM 2015 - Harbin, China
Duration: 5 Aug 20157 Aug 2015

Publication series

NameProceedings of 2015 International Conference on Fluid Power and Mechatronics, FPM 2015

Conference

Conference7th International Conference on Fluid Power and Mechatronics, FPM 2015
Country/TerritoryChina
CityHarbin
Period5/08/157/08/15

Keywords

  • internal force rejection
  • internal force space
  • model-based control
  • parallel electrohydraulic mechanism
  • redundant actuation

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