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Transactions of the Institute of Measurement and Control
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Gain-scheduling fuzzy temperature controller for one-way input system

Shiuh-Jer Huang

Department of Vehicle Engineering, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao East Road, Taipei, Taiwan 106, hd3601{at}ntut.edu.tw, Department of Mechanical Engineering, National Taiwan University of Science and Technology, No. 43, Keelung Road, Sec. 4, Taipei, Taiwan 106

Chen-Chuan Wang

Department of Mechanical Engineering, National Taiwan University of Science and Technology, No. 43, Keelung Road, Sec. 4, Taipei, Taiwan 106

In many chemical and semiconductor manufacturing processes, temperature is an important control parameter for obtaining the desired product quality. Generally, the temperature control system has non-linear time-varying, slow response, time-delay and one-way control input characteristics. It is difficult to estimate accurately the dynamic model and design a general-purpose temperature controller to achieve good control performance. Here a model-free intelligent gain-scheduling fuzzy control strategy is proposed to design a temperature controller for an iron closed chamber with heater input only. The concept of gain scheduling is employed to adjust the mapping ranges of fuzzy membership functions during the control process for improving the control performance. The experimental results show that the steady-state errors of the step input responses are always less than 0.2°C without overshoot by using this control scheme. It is suitable for industrial temperature control systems.

Key Words: fuzzy control • gain scheduling • temperature control and one-way input.

Transactions of the Institute of Measurement and Control, Vol. 30, No. 5, 451-469 (2008)
DOI: 10.1177/0142331207086182
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