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論文名稱 Title |
針對非線性非匹配系統具有干擾估測機制之強韌追蹤控制器設計
Design of Robust Tracking Controllers with Perturbation Estimation for Nonlinear Mismatched Systems |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
80 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2002-06-05 |
繳交日期 Date of Submission |
2002-06-18 |
關鍵字 Keywords |
干擾估測、可變結構控制、追蹤控制、非匹配干擾 Perturbation Estimation, Tracking Control, Variable Structure Control, Mismatched Perturbation |
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統計 Statistics |
本論文已被瀏覽 5683 次,被下載 1533 次 The thesis/dissertation has been browsed 5683 times, has been downloaded 1533 times. |
中文摘要 |
在此論文中針對不同類型之具有非匹配干擾的非線性多輸入多輸出動態系統,介紹三個強韌追蹤控制設計策略。第一個控制器設計方法乃是針對某一類具有標準典型描述式的非線性多輸入多輸出動態系統。第二個控制器設計程序則是針對不具有標準典型描述式的非線性多輸入多輸出動態系統。最後對於受到干擾之具有子系統時變時間延遲相互鏈結項的大型系統,提出一個不需事先知道時間延遲之正確函數型式的分散式控制器。這些具有干擾估測與適應控制機制之強韌追蹤控制器,乃是利用可變結構控制技術與李亞普諾夫穩定理論所設計而成。適應控制機制乃是用來調適干擾估測誤差的未知上界,使得干擾與干擾估測誤差之上界的資訊可不需知曉。由於所提出之控制器的控制增益只需克服干擾估測誤差,一般而言比傳統順滑模態控制器的控制增益還小,所以震顫現象可以被有效地緩減。此外,在論文中也證明了整個控制系統的穩定度,而且所要求之追蹤精準度也可經由調整控制器的設計參數來達成。而針對論文中所提出之每一個控制器設計法則,分別以一個數值實例來展示其可行性。 |
Abstract |
Three robust tracking control design strategies are proposed in this dissertation for different classes of nonlinear MIMO dynamic systems with mismatched perturbations. The first controller design method is proposed for a class of nonlinear MIMO dynamic systems in canonical form. The second design procedure of controller is for the nonlinear MIMO dynamic systems without canonical form. A decentralized controller is presented in the last for perturbed large-scale systems with time-varying delay interconnections, where the knowledge of the exact function of time-delay is not required. These robust tracking controllers with a perturbation estimating scheme and an adaptive control mechanism embedded are designed by means of the variable structure control technique and Lyapunov stability theorem. The adaptive control mechanism is used to adapt the unknown upper-bound of perturbation estimation error, so that the knowledge of upper-bounds of perturbation as well as perturbation estimation error is not required. The chattering phenomenon is effectively alleviated, for the gain of the proposed controllers, which needs only to overcome the perturbation estimation error, is in general smaller than those of the traditional sliding mode controllers. Furthermore, the stability of the overall controlled systems is proved, and the desired tracking accuracy can be achieved by adjusting the design parameters of the proposed controller schemes. A numerical example for each controller's design is provided for demonstrating the feasibility of the proposed control schemes. |
目次 Table of Contents |
Abstract II List of Figures VII List of Notations IX 1 Introduction 1 1.1 Motivations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Brief Sketch of the Contents . . . . . . . . . . . . . . . . . . . 5 2 Design of Robust Tracking Controllers for Nonlinear MIMO Systems with Canonical Form 6 2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 Systemdescriptions and general assumptions . . . . . . . . . . 7 2.3 Design of robust tracking controllers . . . . . . . . . . . . . . 8 2.3.1 Sliding surface design . . . . . . . . . . . . . . . . . . . 8 2.3.2 Controller design . . . . . . . . . . . . . . . . . . . . . 9 2.3.3 Estimation of perturbation . . . . . . . . . . . . . . . . 11 2.3.4 Determination of λi,j and "i . . . . . . . . . . . . . . . 12 2.4 Robustness of systemstability . . . . . . . . . . . . . . . . . . 14 2.5 Adjustment of tracking accuracy . . . . . . . . . . . . . . . . . 17 2.6 Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.7 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3 Design of Robust Tracking Controllers for Nonlinear Mis- matched Systems 28 3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 3.2 Systemdescriptions and assumptions . . . . . . . . . . . . . . 29 3.3 Design of Robust Tracking Controllers . . . . . . . . . . . . . 31 3.3.1 Estimation of Output Tracking Error Dynamics . . . . 32 3.3.2 Sliding Surface Design . . . . . . . . . . . . . . . . . . 36 3.3.3 Controller Design . . . . . . . . . . . . . . . . . . . . . 36 3.3.4 Estimation of ∆pi . . . . . . . . . . . . . . . . . . . . . 38 3.4 Robustness of System’s Stability and Adjustment Of Tracking Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 3.5 Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 3.6 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 4 Design of Robust Tracking Controllers for Perturbed Large- Scale Systems 53 4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 4.2 Systemdescriptions and assumptions . . . . . . . . . . . . . . 55 4.3 Design of decentralized robust tracking controllers . . . . . . . 56 4.3.1 Design of switching surface . . . . . . . . . . . . . . . . 56 4.3.2 Controller design . . . . . . . . . . . . . . . . . . . . . 57 4.3.3 Estimation of ∆Pi . . . . . . . . . . . . . . . . . . . . 58 4.4 Robustness of system’s stability . . . . . . . . . . . . . . . . . 59 4.5 Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 4.6 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 5 Conclusions and Future Works 69 5.1 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 5.2 Future works . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 References 71 |
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