基于单片机的_调机的温度控制系统设计#40;含完整程序#41;毕业论文.docVIP

空调机的温度控制系统设计 摘要 本设计以AT89S51单片机为核心的温度控制系统的工作原理和设计方法。温度信号由温度芯片DS18B20采集，并以数字信号的方式传送给单片机。文中介绍了该控制系统的硬件部分，包括：温度检测电路、温度控制电路、PC机单片机串口通讯 Abstract The thesis studies the Plant of temperature. Firstly，the systeml5 designed and realized. Then the characteristics of temperature of Plant are analyzed inall details from thermodynamics. The approximate mathematics model of temperature plant with one order and dead time is reduced and the meaning of every parameter of this model are expressed, Which is used often and practically in the paper. In addition tot his, we identify the model of the system and the result demonstrated the method is effective for it. Secondly we analyzed advantages and disadvantages of present control method of temperature. One kind of improved Fuzz-Dahlin control method is presented for Temperature Plant with long dead time and non-linearity. The Dahlin control method, The fuzzy control method are combined in this improved method It is demon strated By digital simulation that the improved Fuzzy-Dahlin makes the extra-regulation more small(even zero), the regulation time more short, and the robustness better for the temperature controlled Plant. It is demonstrated by physical experimentation that improved Fuzzy-Dahlin method presented in this Paper is effective for temperature plant with dead time and non-linearity. The control software is compiled with visualc++ and matlab .Its easy to use and friendly to the interface of person and machine on the basis of window2000/xpplatform.There are some functions as modify sample time or modify controllers parameters online, display and copy data of temperature curve, and so on. The control hardware is easy to use and its functions are self contained. Keywords: Intelligent control, model identify, Dahlin control, Fuzzy control, PID control 目录 摘要 I Abstract - 2 - 目录 - 3 - 前言 - 4 - 1 MCS-51单片机简介 - 8 - 1.1芯片的引脚描述 - 8 - 1.2 MSC-51单片机中央处理器 - 11 - 2 温度控制系统的实现 - 13 - 2.1总体设计 - 13 - 2.2信号采样电路设计 - 14 - 2.2.1温度采样电路设计 - 14