| 研究生: |
許家維 Hsu, Chia-wei |
|---|---|
| 論文名稱: |
非線性時間延遲系統模糊-H∞控制器之設計研究 Robust H∞ Controller Design for Nonlinear T-S Fuzzy System With Time Delay |
| 指導教授: |
黃正能
Huang, Cheng-neng |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 系統及船舶機電工程學系 Department of Systems and Naval Mechatronic Engineering |
| 論文出版年: | 2009 |
| 畢業學年度: | 97 |
| 語文別: | 中文 |
| 論文頁數: | 81 |
| 中文關鍵詞: | 模糊 、H∞ 、非線性系統 、強健控制 |
| 外文關鍵詞: | Nonlinear System, H∞, TS Fuzzy, Robust |
| 相關次數: | 點閱:105 下載:1 |
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由於未知系統參數的變動或系統內部改變的不確定性,很可能造成非線性受控系統的工作性能下降,以及系統追蹤性能的目標不易達成,甚至造成閉迴路系統不穩定。此外,受控系統變數的測量、本身物理特性或是訊號傳輸均可能造成系統具有時間延遲特性,本文所提出T-S模糊H∞控制器可處理追蹤性能與時間延遲的問題。
模糊控制器的優點在於使用知識庫的模糊規則來設計控制器,不需要明確的數學模式。使用T-S模糊模型可以簡單的描述非線性時間延遲系統。而H∞控制器的特色是可使受控體在不確定外擾作用及系統參數變動情況下,仍可維持系統的穩定性與強健性。本文結合T-S 模糊模型與H∞控制理論的優點,針對時間延遲系統發展出穩定且具有良好性能的模糊-H∞控制器。
最後,本文針對拖車系統作為電腦模擬控制對象,來驗證針對時間延遲系統所設計之T-S模糊-H∞控制器可行性。經由模擬結果顯示可達到不錯的追蹤性能,並有效降低外系統矩陣不確定性因素的影響。
Since the system performance or the desired specifications is hard to be achieved when there is any unknown or uncertain variables, which could even make systems unstable, and since we also need to consider the system’s delay factors caused from measurement of system variables, system physical properties or signal transmission, a TS (Takaki-Sugeno) Fuzzy- H∞ control law is proposed in the thesis in dealing with the performance-matching and the time-delay problems.
One of the advantages of Fuzzy control theorem is that the controller can be designed by using rules of data base without knowing actual system model. Besides, the nonlinear terms of systems may be included in TS Fuzzy model by rules. Because the characteristic of H∞ controller is to preserve the close-loop stability and robustness of the system, composite TS-Fuzzy H∞ controller, which contains the benefits of both H∞ controller and TS Fuzzy controller, is proposed in this thesis to handle both the system uncertain disturbances and system variable variations, especially for systems with time delay.
Finally, an example with uncertain nonlinear terms is given to illustrate the effectiveness of the proposed approaches. The computer simulation results reveal that the proposed TS Fuzzy-H∞ controller scheme is feasible to reject the system uncertainties or disturbances effectively with good tracking performance.
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