一、前言计算机辅助设计控制系统(简称控制系统CAD)是控制理论到实际应用之间的桥梁。过去,控制系统的分析和设计主要依靠纸和笔以及一些图表的帮助,设计的好坏很大程度上取决于设计者的经验。而对于包含多输入多输出的较为复杂的控制系统的分析和设计则十分困难。近二十多年来,发展了许多分析和设计控制系统的新的理论和方法,这些理论和方法只 I. Preface Computer-aided design control system (referred to as the control system CAD) is a bridge between control theory and practical application. In the past, the analysis and design of control systems relied heavily on the help of paper and pens as well as some charts, which depended very much on the designer’s experience. However, it is very difficult to analyze and design the more complex control system with multiple inputs and multiple outputs. For more than two decades, many new theories and methods of analyzing and designing control systems have been developed. These theories and methods