摘要: 变频调速以其优异调速和起制动性能,高效率、高功率和节能效果,广泛的适用及其它许多优点而被国内外公认为最有发展前途的调速方式,其重要性得到世界各国的重视。模糊控制不需要建立精确的数学模型,对那些难以获得数学模型或者是模型比较粗糙的工业系统,非线性的复杂工业对象实施者有独特优势。本课题将模糊控制与PLC结合,利用PLC实现模糊控制,保留了PLC的可靠灵活,适应能强等特点又提高了控制系统的智能化程度。24488
毕业论文关键词: 变频调速;模糊控制;可编程控制器(PLC);模糊控制器
Frequency Control System of Intelligent Control
Abstract: Frequency Control was at home and abroad recognized as the most promising approach speed.Because it's superior speed and braking performance from high-efficiency, high power factor and energy-saving effect. It has been the growing importance of attention to the world.Fuzzy control does not need to establish accurate mathematical model.The use of fuzzy theory to the experience of people of knowledge, thinking and reasoning process control methods and strategy is from the so-called fuzzy controller to achieve.Therefore fuzzy control for those difficult to obtain the mathematical model or a very rough model of the industrial system. For example, the large time delay, non-linear complexity of the industrial object has a unique advantage of the perpetrators. The topic will be combined with fuzzy control and PLC.Use PLC to achieve fuzzy control.PLC retains the reliable, flexible and adapt to the characteristics of strong.Also increased the level of intelligent control system.
Key words: Frequency; fuzzy control; Programmable Logic Controller (PLC); fuzzy controller
目 录
1. 引言 …1
1.1 国内外变频技术的发展现状 1
1.1.1 国内变频调速技术的发展现状 …1
1.1.2 国外变频调速技术的发展现状 …2
1.2 模糊控制理论概况 3
1.3 选题依据 …3
2. 模糊控制变频调速系统的总体设计 5
2.1 变频调速系统模糊控制策略 5
2.2 plc…5
2.3 变频器 …6
2.4 旋转编码器 …7
2.5 plc与变频器之间的通信8
3. PLC与变频器上位机通信程序设计 …9
3.1 PLC与上位机通信 9
3.1.1 概述 9
3.1.2 通信原理11
3.1.3 通信参数设置11
3.1.4 建立计算机与PLC的通信连接…13
3.2 变频器与上位机通信…13
3.2.1 系统硬件连接与组成…14
3.2.2 变频器参数的设置14
3.2.3 PLC与变频器之间的通信… 16
3.2.4 软件编程17
4. 模糊控制原理与模糊控制器的设计实现 20
4.1 模糊控制原理20
4.1.1 模糊控制器上网基本思想…20
4.1.2 模糊控制器的基本结构21
4.1.3 模糊控制器的特点23
4.2模糊控制器的设计23
4.2.1 模糊控制器的设计步骤23
4.2.2 模糊控制器的设计 …25
4.2.3 建立规则 …26
4.2.4 解模糊 27
4.3 模糊控制的实现 …28 模糊控制在变频调速系统中的应用:http://www.751com.cn/zidonghua/lunwen_18004.html