摘要在控制系统的设计中,PID控制器有着计算量小、使用简便、算法简单,抗干扰能力强等优点,因此在控制领域得到了较为广泛的使用。但是对于一些随时间变化和离散性的问题,一般的PID控制就难以完美实现控制。然而模糊控制不需要被控制对象建立确切的数学模型,而是凝聚了丰富的实践经验实现的一种自动控制方式。在控制领域,模糊控制同样占有重要地位。本论文旨在学习和理解模糊控制理论的思想和设计方法,并设计出模糊PID控制器,最后以三相PWM整流器控制为例,以MATLAB仿真软件为工具建立仿真系统,总结基本PID控制器和模糊PID控制器在动态性能和稳态性能上的区别。根据仿真得出的实验结果,通过对比得出模糊PID控制比基本PID控制更能减小系统的超调量,加快反应速度,缩短调节时间,提升系统控制性能。21827
关键词:MATLAB,PID控制器,模糊控制,仿真 三相PWM整流器
毕业论文设计说明书(论文)外文摘要
Title Fuzzy PID Control of Three-Phase PWM Rectifier
Abstract
In the design of the control system, PID controller with its simple algorithm, small calculation amount, ease of use, robustness strong advantages is widely used, and has achieved good control effect. But for some time-varying and nonlinear systems conventional PID becomes powerless. The fuzzy control does not depend on accurate mathematical model of controlled object.It is a means of achieving operational experience on the basis of summing up the automatic control. In order to deepen the fuzzy control system knowledge and understanding.In this paper, the analysis and elaboration of the theory of fuzzy control based on the analysis of fuzzy PID control and PID control of the basic characteristics.To build simulation models, observed differences in both dynamics and steady-state properties of the three-phase PWM rectifier for double-loop control system.Finally, through the MATLAB software and basic fuzzy PID algorithm PID algorithm simulation comparison, observed both in the steady-state characteristics of the dynamic characteristics and differences, Based on laboratory test results available to the conclusion, fuzzy PID algorithm and the basic PID algorithm, the system of small overshoot and fast response, shorter settling time and improve the system dynamic performance.
Key words: Matlab PID controller Fuzzy Control Simulation Three-phase recPWM tifier
目录
1 引言 1
1.1 PID控制的发展历程 1
1.2 智能控制的发展历史 1
1.3 三相PWM整流器研究简介 2
2 PID控制器 4
2.1 过程控制基本概念 4
2.2 基本P、I、D控制规律及特点 5
2.3 PID控制原理及特点 6
2.4 PID控制器的参数整定 7
3 模糊控制器 8
3.1 模糊控制的基本原理 8
3.2 模糊控制器设计步骤 8
3.3 双输入单输出的模糊控制器设计 9
3.4 模糊控制的优缺点 14
3.5 模糊PID控制原理与设计 14
4 三相PWM整流器 17
4.1 三相电压型PWM整流器拓扑结构 17
4.2 三相PWM整流器数学模型 17
4.3 三相PWM整流器结构设计 19
5 基于两种PID控制的三相PWM整流器仿真 24
5.1 MATLAB仿真环境介绍 24
5.2 基本PID控制的仿真 25
5.3 模糊PID控制的仿真 28 三相PWM 整流器的模糊PID控制研究:http://www.751com.cn/zidonghua/lunwen_14215.html