- Volume 19 Issue 9
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Temperature Control of a CSTR using Fuzzy Gain Scheduling
퍼지 게인 스케쥴링을 이용한 CSTR의 온도 제어
- Kim, Jong-Hwa (Division of IT, Korea Maritime University) ;
- Ko, Kang-Young (Graduate School, Korea Maritime University) ;
- Jin, Gang-Gyoo (Division of IT, Korea Maritime University)
- Received : 2013.02.18
- Accepted : 2013.07.24
- Published : 2013.09.01
A CSTR (Continuous Stirred Tank Reactor) is a highly nonlinear process with varying parameters during operation. Therefore, tuning of the controller and determining the transition policy of controller parameters are required to guarantee the best performance of the CSTR for overall operating regions. In this paper, a methodology employing the 2DOF (Two-Degree-of-Freedom) PID controller, the anti-windup technique and a fuzzy gain scheduler is presented for the temperature control of the CSTR. First, both a local model and an EA (Evolutionary Algorithm) are used to tune the optimal controller parameters at each operating region by minimizing the IAE (Integral of Absolute Error). Then, a set of controller parameters are expressed as functions of the gain scheduling variable. Those functions are implemented using a set of "if-then" fuzzy rules, which is of Sugeno's form. Simulation works for reference tracking, disturbance rejecting and noise rejecting performances show the feasibility of using the proposed method.
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