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Model Identification and Control Method Study on Electro-Hydraulic Pressure Servo System

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4 Author(s)
Junpeng Shao ; Dept. of Mech. Power Eng., Harbin Univ. of Sci. & Technol., Harbin, China ; Guihua Han ; Yuhong Dong ; Zhongwen Wang

Mathematic model of electro-hydraulic pressure servo test bench was obtained based on xPC technique. In order to improve the tracking performance of the pressure servo system a new nonlinear hybrid controller was developed according to the mathematic model, which composed of a classical PID controller and a fuzzy controller based on self-adjusting modifying factor. And interpolation method was used in the modifying factor fuzzy number model; a fuzzy switching mode was employed to avoid the undesirable disturbances caused by the switchover between the two control methods. The hardware-in-the-loop simulation results show that the problems of steady-state error for fuzzy control and rapidity for PID control are solved, and the comprehensive performance of electrohydraulic pressure servo is enhanced when load rigidity and mass changed.

Published in:

Innovative Computing, Information and Control (ICICIC), 2009 Fourth International Conference on

Date of Conference:

7-9 Dec. 2009

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