具有非線性及截止區特性之輸入之非線性時間延遲系統之模式參考適應模糊滑動模式控制

MODEL REFERENCE ADAPTIVE FUZZY SLIDING MODE CONTROL OF TIME-DELAY UNCERTAIN NONLINEAR SYSTEMS WITH INPUT CONTAINING SECTOR NONLINEARITIES AND DEAD-ZONE

張碩傑(Shuo-chieh Chang)

指導教授 ： 龔宗鈞

大同大學/電機資訊學院/電機工程學系所/碩士(2006年)

摘要

本論文是探討具有非線性輸入及截止區特性的非線性時間延遲系統，設計一個模式參考之適應模糊滑動模式控制器。其中，系統的輸入訊號是一種具有扇形特性的非線性函數。由於物理現象的關係，截止區的特性在是相當常見的，因此在本論文中，非線性輸入項不僅僅包含了具有扇形特性的非線性函數且也同時具有截止區的特性。而對於系統整體的擾動，則假設具有未知的上界。
根據Lyapunov穩定度定理分析的觀念，我們設計一個模式參考之適應模糊滑動模式控制器，使系統達到追踪的效能。藉由滑動模式控制優越的強健性，克服了系統延遲及不確定性的問題。此外，我們利用適應模糊技術來估測系統整體的擾動。最後，為了展現本文所提出控制器的性能，我們提出一個例子來驗證其成效。

關鍵字

適應模糊控制 ； 滑動模式控制 ； 截止區

並列摘要

In this thesis, a model reference adaptive fuzzy sliding mode control (MRAFSMC) design for a class of time-delay uncertain nonlinear systems with input containing sector nonlinearities and dead-zone is investigated. First, the fuzzy logic systems are applied to estimate the boundary of the lumped uncertainties. Next, based on the Lyapunov stability theorem, a MRAFSMC law to solve the control problem is proposed. Moreover, the chattering around the sliding hyperplane in the sliding mode control (SMC) can be reduced by the proposed design approach. The proposed strategy not only possesses the advantages of SMC and adaptive fuzzy control, but also eliminates the disadvantage of traditional SMC. A numerical example is given to illustrate the feasibility of the proposed control strategy.

並列關鍵字

Adaptive fuzzy control ； Deadzone ； Sliding mode control

參考文獻

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