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

Baozhu Jia; Hui Cao; Jie Ma

doi:10.4236/jtts.2012.24036

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JTTs> Vol.2 No.4, October 2012

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

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DOI: 10.4236/jtts.2012.24036 3,449 Downloads 5,772 Views Citations

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Baozhu Jia, Hui Cao, Jie Ma

Affiliation(s)

Marine Engineering College, Dalian Maritime University, Dalian, China.
State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, China.

ABSTRACT

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.

KEYWORDS

Ship Control; Fuzzy Switched PID; Track-Keeping; Fuzzy Operating Regime; Stability Condition

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

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.

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