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Control of an Asymmetric Cylinder With Two Individually Controlled Pump/Motors
Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-6839-6134
Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-3877-8147
2023 (English)In: Proceedings of the ASME/BATH 2023Symposium on Fluid Power and Motion Control, AMER SOC MECHANICAL ENGINEERS , 2023Conference paper, Published paper (Refereed)
Abstract [en]

Pump-controlled asymmetric cylinders need some kind ofcompensation for the difference between the in- and outlet flow.This can be done by using valves or additional pump/motors.An advantage with using valves is that only one pump/motor isrequired, but problems with mode-switch oscillations are morelikely to occur. On the other hand, cylinder areas should bewell matched with the pump/motor displacements for pump/motorcompensation if the pump/motors are fixed and connected to thesame shaft. However, this problem is avoided if the pump/motorsare individually controlled. Furthermore, with individually controlledpump/motors, it is possible to control the pressure in one ofthe cylinder chambers and the piston speed simultaneously. Thispaper is focusing on such architectures. There are several possibleconfigurations for architectures and control strategies for individuallycontrolled pump/motors, and some are compared here.Results show that one of the configurations is more efficient thanthe others, but that it is less efficient than valve-compensation (assuminglarge valves). A controller design where one pump/motoris used to control the speed and another to control the pressureis suggested. Results show that the controller should be adaptedbased on the mode of operation.

Place, publisher, year, edition, pages
AMER SOC MECHANICAL ENGINEERS , 2023.
Keywords [en]
Pump-controlled asymmetric cylinders, energy efficiency, electro-hydraulic cylinder drives, linear actuation
National Category
Other Mechanical Engineering
Identifiers
URN: urn:nbn:se:liu:diva-199296DOI: 10.1115/FPMC2023-FM1ISI: 001219322300002ISBN: 9780791887431 (print)OAI: oai:DiVA.org:liu-199296DiVA, id: diva2:1814391
Conference
ASME/Bath Symposium on Fluid Power and Motion Control (FPMC), Sarasota, FL, oct 16-18, 2023
Funder
Swedish Energy Agency, 50181-1Available from: 2023-11-24 Created: 2023-11-24 Last updated: 2024-06-12

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Kärnell, SamuelEricson, Liselott

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