基于模糊分段非二次李雅普诺夫(Lyapunov)函数稳定性理论,对一类受外部干扰且带有离散无穷分布时滞的T—S模糊系统的广义H2稳定控制问题进行了讨论。通过设计非PDC(Non—PDC)模糊控制器,充分考虑子邻域Ω(i=1,2,…,s)之间的转移,给出了保守性较小的使闭环系统广义H2稳定的充分性条件。控制器的设计可以通过线性矩阵不等式(LMI)方法求解得到。仿真例子验证了该方法的有效性。
This paper deals with the generalized H2 control problem for a class of discrete-time Takagai- sugeno (T-S) fuzzy systems with time delays and external disturbances. The time delay is assumed to be infinitely in the discrete-time domain. Firstly, the premise variable space of the T-S fuzzy system is divided into several polyhedral regions, and then, the T-S fuzzy system is transformed to an equivalent switching fuzzy system corresponding to each subregion. Consequently, based on the extended Non-quadratic piecewise Lyapunov functions and the non parallel distributed compensation (Non-PDC) control law, two stabilization criteria with Hz performance can be established for the switching fuzzy system with infinite- distributed delays. The proposed conditions in the criteria and the Non-PDC fuzzy controllers can be obtained by solving a set of linear matrix inequalities(LMIs). Finally, a simulation example is exploited in order to illustrate the effectiveness of the proposed design procedures.