Lecture 9 The Design of Feedback Control Systems 第 9 讲 反馈控制系统的设计
Y．Wang Y.Wang
Introduction 介绍
In this chapter，we address the central issue of the design of compensators． 在本章中，我们讨论了补偿器设计的核心问题。
The performance specification of a feedback control system： 反馈控制系统的性能规格：
－stable -稳定
－an acceptable response to input commands
－less sensitive to system parameter changes
Compromise and adjustment is in general inevitable in practice！
－able to reduce the effect of undesirable disturbances
We have seen that adjust the system parameters can provide the desired system response．However，it is not sufficient．That is，sometimes we must examine the scheme or plan of the system and obtain a new design or plan that results in a suitable system．This is called compensation．
compensation is the adjustment of a system in order to
make up for deficiencies or inadequacies．
Outcomes： 结果：
◻\square Be familiar with the design of lead and lag compensators． ◻\square Understand the value of prefilters and how to design for deadbeat response． ◻\square Have a greater appreciation for the varied approaches available for control system design．
Introduction
In redesigning a control system to alter the system response，an additional component－a compensator－is inserted within the structure of the feedback system．
