The decay rate of control problem for ship steering is considered. This control problem interests as a case which study in nonlinear controller design. Since the model exhibits nonlinear interaction in three degrees of freedom (surge, sway and yaw) by means of main propellers aft of the ship. A controller is designed to solve decay rate problem based on Takagi-Sugeno fuzzy model for ship steering systems by solving the LMI (Linear Matrix Inequality) method and using the PDC (Parallel Distribution Compensation) method. The PDC concept allows us to design the linear feedback gain in the each rule, and then the controller of nonlinear system can be blended by the linear controllers of all rules. Applying LMI methodology, one can solve linear feedback gain for each rule to satisfy the stability conditions of the Takagi-Sugeno type fuzzy ship steering systems. Besides guaranteeing the stability of system, the decay rate of system state can also be improved.


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    Title :

    Fuzzy modeling and control for dynamic positioning systems of ships


    Additional title:

    Fuzzy-Logik-Modellbildung und Regelung für die dynamische Positionierung von Schiffen


    Contributors:
    Wu, S.W. (author) / Chang, W.J. (author) / Yeh, Y.L. (author)

    Published in:

    Publication date :

    2002


    Size :

    6 Seiten, 3 Bilder, 15 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English







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