线性控制系统Module(免费).pptVIP

教材 ： Linear Control Systems Engineering Author: Morris Driels 《线性控制系统工程》 【出 版 社】清华大学出版社 Module 1:Introduction to Feedback Control Why we need automatic control ? How to realize automatic control ? Nature of automatic control ? Tasks of control system analysis ? * The Principle of Automatic Control 自动控制原理 章 鹏 重庆大学光电工程学院 Needs for the practical activities Human can not work day after night with the tremendous effects. The efficiency of the productivity is always limited. Material wealth is far from the needs of civilization society. Why We Need Automation Inevitable results to understand and change the world. inevitable requirements to improve the social productivity and efficiency. inevitable choices for the energy conservation and the ensure of production quality. Inevitable methods to improve the working condition and living quality. Automation will greatly accelerate the innovation of social structure and process of social informationization How to realize automatic control Automation refers to the unmanned machines or devices operate automatically in accordance with the preset procedure or directives. Question: What kinds of structure can realize “unmanned” ? Is there any rules can be followed? How to realize automatic control If the temperatures and pressures of hot and cold water are unchanged, the water temperature depends on the angle of valve If the temperatures and pressures of hot and cold water are changed, what will happen? How to realize automatic control Temperature sensors measure the water temperature and send it to the brain; The brain compares the water temperature with the desired temperature, and drives a control signal output by hand. The hand manipulates the mixer valve to achieve a desired temperature. “Unmanned” Temperature control system Generalized feedback control system Plant: the major component being controlled, it’s transfer function is fixed Controller: the control device designed by engine