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Global H∞ controllers for a class of nonlinear systems

机译:一类非线性系统的全局H∞控制器

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摘要

In this note, the problem of state feedback H∞ control for a class of nonlinear systems is considered. The class under study is a generalization of the well-known Lur'e systems. The H∞ problem is addressed via a class of storage functions of the Lur'e-Postnikov type whose integral term is parameterized by a nonlinear scalar function. The related H∞ controllers consist of a linear term, which is designed for the underlying linearized system, plus a nonlinear term which depends on the nonlinear function. A simple geometrical criterion is provided for the characterization of the set of controllers which ensure a given level of L2-performance globally. Some guidelines for an effective design of the controller within this set are discussed via two examples.
机译:在本说明中,考虑了一类非线性系统的状态反馈H∞控制问题。所研究的课程是对著名Lur'e系统的概括。 H∞问题通过一类Lur'e-Postnikov类型的存储函数来解决,该函数的积分项由非线性标量函数参数化。相关的H∞控制器包括为基础线性化系统设计的线性项以及依赖于非线性函数的非线性项。提供了一个简单的几何准则来表征一组控制器,以确保全局达到给定的L2性能水平。通过两个示例讨论了该组控制器的有效设计的一些准则。

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