Linear fuzzy controller design for dynamic positioning system of surface ships

被引:0
作者
Ngongi, Werneld [1 ]
Du, Jialu [1 ]
机构
[1] School of Information Science and Technology, Dalian Maritime University, No. 1, Linghai Road, Dalian, Liaoning Province
关键词
Dynamic positioning system; Eigenvalue problem; EVP; H[!sup]∞[!/sup] control techniques; Linear fuzzy controller; Linear matrix inequality; LMI; Lyapunov stability theorems; Takagi-Sugeno fuzzy model; Uniformly ultimately bound; UUB;
D O I
10.1504/IJISTA.2015.072215
中图分类号
学科分类号
摘要
This paper presents a linear fuzzy controller design for dynamic positioning (DP) system of surface ships using optimal H∞ control techniques. The control technique is used to exterminate the effects of environmental disturbances. First, a Takagi-Sugeno (TS) fuzzy model is used to approximate the nonlinear DP system. Then, linear matrix inequality (LMI) and eigenvalue problem (EVP) methods are employed to solve the robust fuzzy control problem. We use the Lyapunov stability theory to prove the stability of the controller. A positive definite matrix is determined by solving LMI equations using robust control toolbox available in MATLAB. The obtained positive definite matrix proves that the fuzzy controller is stable. Finally, a uniformly ultimately bound (UUB) and control performance is guaranteed. Simulation is carried out, and results are presented to validate the effectiveness and performance of the proposed control system. Copyright © 2015 Inderscience Enterprises Ltd.
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页码:1 / 26
页数:25
相关论文
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