Magnus B. Kjellander
Department of Engineering, University of Agder, Grimstad, Norway
Michael R. Hansen
Department of Engineering, University of Agder, Grimstad, Norway
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http://dx.doi.org/10.3384/ecp1392a33Ingår i: 13th Scandinavian International Conference on Fluid Power; June 3-5; 2013; Linköping; Sweden
Linköping Electronic Conference Proceedings 92:33, s. 337-345
Publicerad: 2013-09-09
ISBN: 978-91-7519-572-8
ISSN: 1650-3686 (tryckt), 1650-3740 (online)
This paper is concerned with the inherent oscillatory nature of pressure compensated motion control of a hydraulic cylinder subjected to a negative load and suspended by means of an overcenter valve. A pressure feedback scheme that indirectly eliminates the oscillations is investigated. The indirect control scheme utilizes pressure feedback to electronically compensate the metering-out allowing for the removal of the compensator and; subsequently; elimination of the oscillations. The suggested electronic compensation scheme is implemented and examined in a single degree-of-freedom test rig actuated by means of a double acting hydraulic cylinder. The control scheme is compared with other control schemes and the importance of measurement filtering and controller cycle time are investigated
measurement filtering and controller cycle time are investigated.
Keywords: Overcenter valve; pressure feedback; negative load; experimental verification
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