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A Hybrid Method for the Analysis of Non-uniformly Sampled Systems

机译:分析非均匀采样系统的一种混合方法

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In this chapter we propose a method for the analysis of sampled-data systems with sampling jitter. We consider that the sampling interval is unknown and time-varying and we provide a method for estimating the Lyapunov exponent. The proposed method is hybrid, in the sense that it combines continuous-time models (based on time delay systems) with polytopic embedding methods, specific to discrete-time approaches. The approach exploits the fact that the command is a piecewise constant signal and leads to less conservative stability conditions with respect to the existing literature. Using geometrical arguments, a lower bound of the Lyapunov exponent can be expressed as a generalized eigenvalue problem. Numerical examples are given to illustrate the approach.
机译:在本章中,我们提出了一种分析带有采样抖动的采样数据系统的方法。我们认为采样间隔是未知的并且是随时间变化的,并且我们提供了一种估计李雅普诺夫指数的方法。从某种意义上说,所提出的方法是混合的,因为它将连续时间模型(基于时延系统)与特定于离散时间方法的多面体嵌入方法相结合。该方法利用了以下事实:该命令是分段恒定信号,相对于现有文献,该命令导致较为保守的稳定性条件。使用几何参数,李雅普诺夫指数的下界可以表示为广义特征值问题。数值例子说明了该方法。

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