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High Precision Pressure Control of a Pneumatic Chamber using a Hybrid Fuzzy PID Controller  

Liu, Hao (Department of Mechanical Engineering, Graduate School, Keimyung University)
Lee, Jae-Cheon (Faculty of Mechanical and Automotive Engineering, Keimyung University)
Li, Bao-Ren (FESTO Pneumatic Center, School of Mechanical Science and Engineering, Huazhong University of Science and Technology)
Publication Information
International Journal of Precision Engineering and Manufacturing / v.8, no.3, 2007 , pp. 8-13 More about this Journal
Abstract
A hybrid fuzzy PID controller for a pneumatic chamber is proposed in this paper. First, a mathematical model of a pneumatic pressure servocontrol system was developed where separate implementations of a PID controller and a fuzzy controller were made. The experimental results using a step input signal revealed that the PID controller accurately controlled the steady-state pressure but did not robustly handle parameter variations in the system while the fuzzy controller provided a fast rise time and low overshoot of the pressure in the system. In order to attain the advantages of both the fuzzy and PID controllers, a hybrid control scheme was developed. The experimental results show that the hybrid fuzzy PID controller proposed in this study does indeed possess the advantages of both PID and fuzzy controllers. Hence, it can be concluded that the hybrid fuzzy PID controller is suited for high-precision control of pressure in a pneumatic chamber.
Keywords
Pneumatic pressure source; Pressure servo; Hybrid fuzzy PID control; Overshoot; Rise time;
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Times Cited By Web Of Science : 11  (Related Records In Web of Science)
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