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Robust H∞ control for nonlinear systems over network: A piecewise analysis method

机译:网络上非线性系统的鲁棒H∞控制:分段分析方法

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摘要

A piecewise analysis method (PAM) is proposed to investigate the H∞ performance analysis and H∞ control design for nonlinear networked control systems (NNCSs), which are presented in the form of T-S fuzzy model with time-varying input delay. Different from the existing method in dealing with the time-varying delay, the whole variation interval of the delay is divided into two subintervals with equal length. Respecting for the delay belonging each subinterval, new criteria on H∞ performance analysis of the NNCSs are obtained by checking the variation of the derivative of the Lyapunov functional in the two subintervals. Then, criteria for the H∞ controller design are obtained by using the convexity properties of the matrix inequality and some other new analysis techniques, which are shown in terms of nonlinear matrix inequalities and can be solved by using a cone complementarity liberalization method. As application of the derived results, H∞ controller design is carried out for the nonlinear mass-spring system. Discussion shows that the proposed method is less conservative than the existing references.
机译:提出了一种分段分析方法(PAM)来研究非线性网络控制系统(NNCSs)的H∞性能分析和H∞控制设计,以具有时变输入时滞的T-S模糊模型的形式给出。与现有的时变延迟处理方法不同,该延迟的整个变化间隔被分为两个等长的子间隔。考虑到属于每个子区间的延迟,通过检查两个子区间的Lyapunov函数导数的变化,获得了关于NNCS的H∞性能分析的新标准。然后,利用矩阵不等式的凸性和其他一些新的分析技术来获得H∞控制器设计的准则,这些非线性技术可以用非线性矩阵不等式表示,并且可以使用锥互补自由化方法求解。利用所得结果,对非线性质量弹簧系统进行了H∞控制器设计。讨论表明,所提出的方法不如现有参考文献那么保守。

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