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Control Systems with Actuator Saturation

Analysis and Design

  • Tingshu Hu
  • Zongli Lin

Part of the Control Engineering book series (CONTRENGIN)

Table of contents

  1. Front Matter
    Pages i-xvi
  2. Tingshu Hu, Zongli Lin
    Pages 1-9
  3. Tingshu Hu, Zongli Lin
    Pages 11-35
  4. Tingshu Hu, Zongli Lin
    Pages 37-53
  5. Tingshu Hu, Zongli Lin
    Pages 113-156
  6. Tingshu Hu, Zongli Lin
    Pages 183-193
  7. Tingshu Hu, Zongli Lin
    Pages 211-228
  8. Tingshu Hu, Zongli Lin
    Pages 229-264
  9. Tingshu Hu, Zongli Lin
    Pages 265-303
  10. Tingshu Hu, Zongli Lin
    Pages 305-325
  11. Tingshu Hu, Zongli Lin
    Pages 327-373
  12. Back Matter
    Pages 375-392

About this book

Introduction

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.

Keywords

Actuator saturation Control Engineering Linear Systems Sensor actuator calculus reading

Authors and affiliations

  • Tingshu Hu
    • 1
  • Zongli Lin
    • 1
  1. 1.Department of Electrical EngineeringUniversity of VirginiaCharlottesvilleUSA

Bibliographic information