Design and Stability Analysis of Fuzzy Switched PID Controller for Ship Track-Keeping

DOI: 10.4236/jtts.2012.24036   PDF   HTML     3,617 Downloads   5,951 Views   Citations


The fuzzy switched PID controller which combines fuzzy PD and conventional PI controller is proposed for ship track-keeping autopilot In this paper. By using rudder angle, the whole voyage is divided into two operating regimes which named transient operating regime and steady operating regime respectively. The fuzzy PD controller is employed in transient operating regime for increasing response, reducing overshoot and shorting transition time. And conventional PI controller is used to improve the stable accuracy in steady operating regime. The global controller is achieved by fuzzy blending of all local controllers. Routh stability criterion is utilized to obtain the stability condition of closed-loop system. The simulation results show the effectiveness of proposed method.

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B. Jia, H. Cao and J. Ma, "Design and Stability Analysis of Fuzzy Switched PID Controller for Ship Track-Keeping," Journal of Transportation Technologies, Vol. 2 No. 4, 2012, pp. 334-338. doi: 10.4236/jtts.2012.24036.

Conflicts of Interest

The authors declare no conflicts of interest.


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