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  • 學位論文

含時滯之多輸入多輸出系統的增益邊際和相位邊際分析

Gain Margins and Phase Margins of MIMO Systems with Time-delays

指導教授 : 韓光渭
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摘要


本論文主要目的是運用增益相位邊際測試器,結合穩定方程式和參 數平面法,針對含有時滯之多輸入多輸出系統作增益邊際和相位邊 際分析。為了這個目的,首先我們先說明四種多輸入多輸出系統之 增益邊際和相位邊際的物理意義,並舉例討論這幾種增益邊際和相 位邊,然後討論加入時滯後對系統的影響,最後以各種工具如:波 德圖、奈奎氏圖、根軌跡圖和SIMULINK加以驗證。 當我們只知道系統的狀態方程式,而不知道系統方塊圖時,雖然可 以利用穩定方程式法來分析系統的穩定性,但在分析增益邊際和相 位邊際時,卻會有不唯一之情形。因此,我們對以狀態表示的系統 加了一些條件,使由狀態方程式轉換過來的系統與系統方塊圖相吻 合。結果不但狀態參數對系統穩定性的影響可用穩定邊界曲線表現 出來,而且可以加入增益相位邊際測試器結合穩定方程式和參數平 面法來從事增益邊際和相位邊際之設計與分析。

並列摘要


The main purpose of this thesis is to use gain-phase margin tester technique combined with stability-equations method and parameter-plane method to analyze gain-margins and phase-margins of MIMO systems with time-delays. Both control systems expressed by block diagrams and by state equations are considered . The physical meanings of gain-margins and phase-margins of MIMO systems are presented first , then the effects due to time-delays are studied . All the obtained results are checked by use of Bode diagrams,Nyquist diagrams, root loci and SIMULINK.

參考文獻


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