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The Control Methods Study of Time-Delay System

Author: YuGuoXiang
Tutor: ZhangYanJun
School: Qingdao University of Science and Technology
Course: Detection Technology and Automation
Keywords: time-delay fuzzy smith cascade compound control Sliding mode variable structure control optimal sliding mode control global sliding mode control (GSMC)
CLC: TP273
Type: Master's thesis
Year: 2008
Downloads: 215
Quote: 5
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Abstract


Time-delay system is the important field for the application of the control theory. In this paper, intelligent control and sliding model variable structure control for time-delay system is introduced in order to increase the robustness of the general time-delay control system. Firstly, this paper analyzes the dynamic performance of time-delay, discusses the insufficiency of some general control schemes for time-delay. Smith controller is a kind of compensation control based on plant model, but it is sensitive to the variance of parameter. Fuzzy control does not require accurate plant model, but it can not be directly applied for time-delay system. Therefore, this paper presents a kind of new fuzzy adaptive approaches to time-delay systems, which combines fuzzy control and Smith control. Sliding model variable structure control is robust to parameter and external disturbance uncertainty, so state-delay global sliding mode control and input-delay optimal sliding mode uncertain system by sliding mode variable structure control are studied in this paper, and the apply is studied at chemical reaction. The result of simulation shows that the designed fuzzy smith cascade compound controller and sliding mode variable structure control controller are effective.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system
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