Control Systems with Actuator Saturation: Analysis and Design
Control Systems with Actuator Saturation: Analysis and Design
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DOI：
10.1007/978-1-4612-0205-9
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发表时间：
2001-06
期刊：
影响因子：
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通讯作者：
T. Hu;Zongli Lin
中科院分区：
文献类型：
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作者：
T. Hu;Zongli Lin
饱和非线性在工程系统中普遍存在。在控制系统中，每个物理执行器或传感器由于其最大和最小极限而受到饱和。如果数字滤波器是以有限字长格式实现的，则它容易饱和。饱和非线性也被有意地引入到工程系统中，如控制系统和神经网络系统。无论饱和是如何产生的，包含饱和非线性的系统的分析和设计是一个重要的问题。这一问题不仅在理论上具有挑战性，而且在实践中也势在必行。这本书打算以系统的方式研究具有执行器饱和的控制系统。同时也给出了状态饱和或传感器饱和系统的一些相关结果。粗略地说，有两种策略用于处理执行器饱和。第一种策略是在控制设计过程的第一阶段忽略饱和，然后加入一些针对具体问题的方案来处理饱和带来的不利影响。这些计划，被称为反饱和计划，通常是使用特设的修改和广泛的模拟。这些方案背后的基本思想是引入额外的反馈，以使致动器适当地保持在其极限范围内。大多数这些计划导致改善的性能，但知之甚少的稳定性。
Saturation nonlinearities are ubiquitous in engineering systems. In control systems, every physical actuator or sensor is subject to saturation owing to its maximum and minimum limits. A digital filter is subject to saturation if it is implemented in a finite word length format. Saturation nonlinearities are also purposely introduced into engineering systems such as control sys tems and neural network systems. Regardless of how saturation arises, the analysis and design of a system that contains saturation nonlinearities is an important problem. Not only is this problem theoretically challenging, but it is also practically imperative. This book intends to study control systems with actuator saturation in a systematic way. It will also present some related results on systems with state saturation or sensor saturation. Roughly speaking, there are two strategies for dealing with actuator sat uration. The first strategy is to neglect the saturation in the first stage of the control design process, and then to add some problem-specific schemes to deal with the adverse effects caused by saturation. These schemes, known as anti-windup schemes, are typically introduced using ad hoc modifications and extensive simulations. The basic idea behind these schemes is to intro duce additional feedbacks in such a way that the actuator stays properly within its limits. Most of these schemes lead to improved performance but poorly understood stability properties.