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Use of a Two-Stage Electrohydraulic Controller With an Axial Piston Pump
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English
Abstract
This paper presents a mathematical model of an axial piston pump/two-stage electrohydraulic controller combination. The controller uses swashplate position feedback and has been specially designed so that it is of low-to-moderate cost and so that it can respond quickly to control changes. The first stage of the controller makes use of a squeeze film damper and is dynamically stable. The model may be used for design purposes inasmuch as geometry and operating conditions can be varied over wide limits and the resulting dynamical behavior evaluated. Calculation of the dynamic response to a control current for the operating conditions and geometry of the valve shows close agreement with experiment.
Authors
Citation
Akers, A. and Lin, S., "Use of a Two-Stage Electrohydraulic Controller With an Axial Piston Pump," SAE Technical Paper 891860, 1989, https://doi.org/10.4271/891860.Also In
References
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- Myers A. “A new generation of electrohydraulic control for hydrostatic transmissions,” SAE Proceedings Transmissions and Transmission Controls for Off-Highway Equipment, Paper No. 83150 55 64 1983
- Lin S. J. Akers A. “A dynamic model of the flapper-nozzle component of an electrohydraulic servovalve,” ASME Journal of Dynamic Systems, Measurement and Control, III No.1 105 109 1989
- Merritt H. E. Hydraulic control systems John Wiley and Sons, Inc New York 1967
- Zeiger G. Akers A. “Torque on the swashplate of an axial piston pump,” ASME Journal of Dynamic Systems Measurement and Control 107 3 220 226 1985
- Myers A. (Sundstrand-Sauer), Private communication-concerning experimental results 1986