Optimal Control Theory Applied to a Pump With Single-Stage Electrohydraulic Servovalve

[+] Author and Article Information
A. Akers

Department of Engineering Science and Mechanics, Engineering Research Institute, Iowa State University, Ames, Iowa

S. J. Lin

Department of Industrial Studies, Moorhead State University, Moorhead, Minn.

J. Dyn. Sys., Meas., Control 110(2), 120-125 (Jun 01, 1988) (6 pages) doi:10.1115/1.3152661 History: Received August 01, 1986; Online July 21, 2009


Optimal control theory is applied to the design of a pressure regulator for an axial piston pump and single-stage electrohydraulic valve combination. The control valve has been modeled and an optimal control law has been formulated. The time response curves due to a step input inflow rate and in current input to the servovalve have been obtained for the open loop and for the optimal control system. Comparison of the results has been made with previous work in which the supply valve to the swashplate actuators was not modeled. It is shown that controlled system modeling of the servovalve significantly improves system performance in terms of response frequency and pressure peaks.

Copyright © 1988 by ASME
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