Optimal Control of Speed Conversion of a Valve Controlled Cylinder System

[+] Author and Article Information
Zhou Shichang, Cao Xingmin, Cen Yuwan

Northeast University of Technology, Shenyang, Liaoning, People’s Republic of China

J. Dyn. Sys., Meas., Control 113(4), 691-695 (Dec 01, 1991) (5 pages) doi:10.1115/1.2896476 History: Received January 01, 1987; Revised January 01, 1991; Online March 17, 2008


It can generally cause a great pressure surge and noise when the speed of an actuator is quickly changed in a large-scale hydraulic system. In this paper, the pressure surge is considered as a response of the system to the input signal in order to obtain an optimal control for the minimum pressure surge in the shortest speed conversion time. The dynamic performance of the valve controlled cylinder system studied is described by space state equations, and the optimal control is obtained by the simplex method for 3 performance indices. The microprocessor is used for the optimal control in the speed conversion of the test system. The results of the numerical computer simulation and the experimental results are similar. It also shows that within the same or shorter settling time, using the optimal control can reduce the pressure surge to about one fifth of the pressure response amplitude to the step input signal.

Copyright © 1991 by The American Society of Mechanical Engineers
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