河北联合大学轻工学院
COLLEGE OF LIGHT INDUSTRY, HEBEI UNITED UNIVERSITY
毕业设计说明书
基于模糊控制的温度控制系统设计
学生姓名：____张明飞________________ 学 号：___ 200715280106__________ 专业班级：____07自动化拓展1班_____ 学 部：____基础教学部______ __ 指导教师：____梁秀满________________
2011年6月15日
摘 要
温度控制在工业生产中运用的非常广泛，其控制过程中存在着很大的时滞性和很强的干扰。采用一般的控制方法如PID控制，都不能很好地满足要求。而基于模糊算法的温度控制策略可以很容易的解决这些问题。
以AT89C2051单片机为模糊控制器，结合温度传感变送器、A/D转换器、LED显示器、固态继电器等，组成一个基于模糊控制算法的温度控制系统。
在此系统中，温度传感变送器获得温度的感应电压，转变成1~5V的标准电压信号，再由A/D转换器转换成数字信号进入单片机内部。单片机将给定的温度与测量温度的相比较，得出偏差量。然后根据模糊控制算法得出控制量。执行器由开关频率较高的固态继电器开关担任，采用模拟的PWM控制方法，改变同一个周期中电子开关的闭合时间，达到控制的目的。
关键词：单片机，模糊控制，测量变送
I
Abstract
Temperature control is used widely in industry production, with large lag and big disturb. Tradition control method for example PID control method can’t meet the request. But the use of the Fuzzy control in temperature control can meet the need easily.
Using the AT89C2051 single chip computer as the Fuzzy controller, with temperature measure and adjust-convection instrument, A/D transformer, LED displayer, solid switch and so on, form a temperature control which based on Fuzzy control arithmetic.
In such system, temperature measure and adjust-convection instrument measures the temperature and changed into normative 1~5 voltage signals, the A/D transformer transform the analog signals into digital signals, and introduce into the single chip computer. And the single chip computer educes the control value which based on the difference between the initialization and the measure value. Solid switch with high frequence used as a executor and use a analog PWM converter, to change the close time in a decided periods, which aimed at control the temperature.
Keywords: Single chip microcomputer,Fuzzy control, measure and adjust-convection
II
基于模糊控制的温度控制系统设计
