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Student Number 85344008
Author Fang-Ming Yu(¤×ªÚ»Ê)
Author's Email Address fmyeu@mail.kwit.edu.tw
Statistics This thesis had been viewed 1724 times. Download 1110 times.
Department Electrical Engineering
Year 2002
Semester 2
Degree Ph.D.
Type of Document Doctoral Dissertation
Language English
Title Practical Fuzzy Sliding Mode Controller for Nonlinear
Systems
Date of Defense 2003-07-09
Page Count 104
Keyword
  • fuzzy sliding mode controller
  • nonlinear systems
  • single fuzzy input
  • Abstract A practical fuzzy sliding mode controller for uncertain time-delay with nonlinear
    input systems and for a class of nonlinear systems is presented. The controller design
    deals with the problems of the dimensionality of fuzzy input variables in fuzzy logic
    control (FLC) and the chattering phenomena in sliding mode control (SMC)
    effectively. The main results of the proposed method are as follows.
    1. We propose two methods to reduce the number of fuzzy input variables. First,
    without affecting the performance of the system, the proposed single-fuzzy- input
    quasi fuzzy sliding mode controller (SQ-FSMC) by way of a composite state
    function reduces the number of rules greatly. Second ly, the design of decoupled
    single-fuzzy- input fuzzy sliding mode controller (SFI-FSMC) for the fourth-order
    coupled systems shows a better performance than previous work.
    2. For the chattering problem of the SMC, this phenomenon can be reduced
    effectively with the proposed controller by adjusting the control input near the
    sliding hyperplane.
    3. A self-tuning single-fuzzy-input controller (ST-SFIC) can be easily applied to
    uncertain time-delay dynamical systems with nonlinear input. The self-tuning
    scheme dramatically improves the control input behavior. Also, the chattering
    phenomenon is eliminated effectively. The control algorithm is convenient and
    easy to utilize.
    The above methods have been illustrated by the simulation results of the pole and the
    cart systems as well as the ball and beam systems. In addition, the uncertain
    time-delay with a nonlinear input system can be stabilized to the equilibrium. The
    experimental results of the present seesaw system with external disturbance are given.
    Table of Content Contents I
    Abstract III
    List of Figures V
    List of Tables VIII
    Chapter 1 Introduction
    1.1 Motivation and Background 1
    1.2 Organization and Main Tasks 3
    Chapter 2 Problems Formulations
    2.1 Single- input Plant System 8
    2.2 Coupled System 9
    2.3 Uncertain Time-delay System with Nonlinear Input 11
    Chapter 3 Methodology
    3.1 Design of Single-fuzzy- input Quasi-FSMC (SQ-FSMC) 16
    3.2 Design of Decoupled Fuzzy Logic Controller 21
    3.3 Design of FSMC for Uncertain Time-delay Systems with
    Nonlinear Input 25
    3.4 Design of Self-tuning Single-fuzzy- input Controller (ST-SFIC) for
    Uncertain Time-delay Systems with Nonlinear Input 31
    3.4.1 Single- fuzzy- input Controller (SFIC) for Uncertain
    Time-delay Systems with Nonlinear Input 31
    3.4.2 Self-tuning Scheme and Scaling Factor 34
    Chapter 4 Examples and Simulations
    4.1 Two Examples of Single-fuzzy- input Quasi-FSMC (SQ-FSMC) 46
    4.2 Three Examples of Decoupled Fuzzy Logic Controller 51
    4.3 Example of FSMC for Uncertain Time-delay Systems with
    Nonlinear Input 56
    4.4 Example of Self- tuning Single-fuzzy- input Controller (ST-SFIC)
    for Chattering Elimination of Uncertain Time-delay Systems with
    Nonlinear Input 59
    Chapter 5 Discussion and Conclusions 84
    References 86
    Author¡¦s Information 92
    Publication List 93
    Reference 86
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    Advisor
  • Hung-Yuan Chung(ÁéÂE·½)
  • Files
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  • approve immediately
    Date of Submission 2003-07-16

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