基于模糊Smith控制的智能阀门定位器

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Abstract

In view of the widespread phenomenon of time lag in the industrial control valve, a kind of intelligent valve positioner control method is proposed. The method is based on the fuzzy theory and Smith predictor. This paper analyzes of the structure and principle of smart valve positioner. Smith predictor is designed to compensate the delayed time and realize the advanced response. It overcomes the delay performance of the system. With the combination of fuzzy control and PID control, fuzzy rules are designed to adjust controller parameters. The combination of the two control schemes contributes to the fuzzy Smith method, which can improve the dynamic and static performances of the system. Fuzzy internal model controller overcomes the delay and improves the performance of the system. Simulating research of the fuzzy Smith controller, fuzzy internal model controller and PID controller shows that the fuzzy Smith control method is better than the fuzzy internal model control method and the traditional PID method because the first one can effectively improve the speed of the control valve, overcome the time delay and improve the performance of the system.

Key words： intelligent valve positioner fuzzy Smith method fuzzy internal model control time delay

Received: 28 September 2016 Published: 10 July 2017

ZTFLH:

TP273⁺.4

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	Articles by authors
	Hao ZHANG
	Xin WANG
	Zhenlei WANG
	Maoxuan ZHI
	Mingjing JIANG

Cite this article:

Hao ZHANG,Xin WANG,Zhenlei WANG, et al. Research on Intelligent Valve Positioner Based on Fuzzy-Smith Control Method[J]. Research and Exploration in Laboratory, 2017, 36(5): 4-5.

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http://www.qk.sjtu.edu.cn/rel/EN/ OR http://www.qk.sjtu.edu.cn/rel/EN/Y2017/V36/I5/4

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