Title :
A new time-delay compensation scheme for hydraulic systems
Author :
Lin, Chun-Liang ; Chen, Chun-Hsiung ; Van-Tsai Liu ; Hwang, Thong-Shing
Author_Institution :
Dept. of Electr. Eng., Nat. Chung Hsing Univ., Taichung, Taiwan
Abstract :
Operating delay time in the solenoid valves is common in the practical electro-hydraulic servo systems. This may sometimes cause closed-loop instability if it wasn´t treated carefully in the control system designs. We propose a non-model-based design approach for hydraulic actuating systems based on a new time-delay compensation scheme. In the proposed system, two types of controllers are combined; one is a fuzzy-PID controller used to ensure tracking performance, the other one is an adaptable wavelet compensator used to compensate for the time delay resulting from the control valve. Performance of the proposed design is widely verified on a newly developed simulation platform to show its effectiveness.
Keywords :
control system synthesis; delays; electrohydraulic control equipment; fuzzy control; hydraulic systems; servomechanisms; three-term control; valves; wavelet transforms; adaptable wavelet compensator; closed-loop instability; control system designs; electrohydraulic servosystems; fuzzy-PID controller; hydraulic actuating systems; nonmodel-based design approach; solenoid valves; time-delay compensation scheme; Automatic control; Control systems; Delay effects; Hydraulic actuators; Hydraulic systems; Petroleum; Pistons; Pulse width modulation; Solenoids; Valves; Hydraulic system; fuzzy control; neural network; position control; time-delay;
Conference_Titel :
Industrial Electronics, 2004 IEEE International Symposium on
Print_ISBN :
0-7803-8304-4
DOI :
10.1109/ISIE.2004.1571881
