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不确定时滞模糊系统的分析与控制

【作者】 王进

【导师】 徐胜元;

【作者基本信息】 南京理工大学 , 控制理论与控制工程, 2006, 硕士

【摘要】 本文主要是对具有分布时滞的不确定模糊系统的稳定性分析以及模糊控制器的设计做一些理论上的研究。根据分布时滞系统的特点,结合模糊系统的内在特性,利用线性矩阵不等式(LMI)方法,基于T—S模糊模型,本文解决了所要研究系统的稳定性分析及鲁棒状态反馈控制器设计的问题。然后在此基础上,开展多重控制方法的研究,首先得到了系统的H控制器、保成本控制器、L2-L控制器存在的充分条件及设计方法;其次,考虑控制器的参数不确定性,对系统的非易碎鲁棒控制、非易碎H控制、非易碎保成本控制、非易碎L2-L控制进行了研究,并得到了含有参数不确定性的控制器的存在条件和设计方法。然后,本文采用MATLAB中的LMI工具箱进行编程求解控制器增益矩阵;并通过SIMULINK工具箱对数值算例进行仿真,验证了课题中研究得到的算法和结果,说明了所得结果的有效性。最后,展望了模糊控制系统的发展方向,指出今后有待进一步研究的问题。

【Abstract】 This paper is concerned with the theoretic study on the stability analysis and the design of fuzzy controllers of uncertain fuzzy systems with distributed delays. The uncertain parameters are supposed to be time-varying but norm-bounded. By the characterizations of Takagi-Sugeno (T-S) fuzzy model systems with distributed delays, the problems of stability analysis and state feedback controller design are solved via the linear matrix inequality (LMI) appraoch. Specifically, sufficient conditions in terms of LMLs are obtained for the existence of fuzzy robust H state feedback controllers guaranteed cost controllers and L2 - L controllers, respectively. When parameter uncertainties appear in controller gains, the problems of non-fragile H control, guaranteed cost control and L2 -L control are also considered and the corresponding solvability conditions are presented, respectively. Via the LMI Control Toolbox and Simulink in MATLAB, illustrative examples are provided to show the effectiveness of the proposed methods. Finally, some related issues which are worth studying in the future are pointed out in the conclusion.

  • 【分类号】TP273
  • 【下载频次】187
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