本科毕业论文----多段电阻炉温度控制系统的设计 .doc

多段电阻炉温度控制系统的设计 摘 要 温度是生产实践中普遍存在的被控物理量，随着科学技术的发展，电阻炉的应用越来越广泛。因此在现代控制领域中,精密温度控制成为最重要的研究课题之一。本设计首先对电阻炉的研究现状、发展过程以及设计目的进行介绍，确定了以三段电阻炉作为控制对象；其次，根据系统的要求选择控制输出方式和控制算法，确定了采用单相交流固态继电器的控制输出方式和带有解耦控制输出的变积分PID控制算法；最后介绍了系统硬件设计思想、系统硬件的选择及硬件框图，在软件方面，采用了基于PLC程序设计，同时阐述了PLC与上位机通讯实现等问题，并在此基础上根据实验室条件对系统的控制算法进行了MATLAB仿真，对单相交流调功模块进行了PLC仿真实验，以此完成了多段电阻炉温度控制系统的设计。 关键词：多段电阻炉；温度控制；变速积分PID；PLC THE DESIGN OF MULTI-SEGMENT RESISTANCE FURNANCE SYSTEM Abstract Temperature is prevalent in the control of the physical parameters in the practice, Along with the development of science and technology, resistance furnace was applicated more and more extensive, therefore in the modern controlling field, This design first introduces the current situation of Electric resistance furnace research, the developing process as well as the design goal., determination of the three of the resistance furnace as the control object. Then according to requirements of the system to choose the output way and the algorithm, determines the single phase AC solid state relay control output way and speed change integral PID control algorithm. Finally, this article elaborated the system hardware design mentality, the system design component shaping and the hardware diagram, In the field of software Have adopted owing to PLC programming as well as introduced The software designs of the PLC communication to the higher position machine’s realization question and so on .Meanwhile, under laboratory conditions to simulate on MATLAB and simulation single-phase AC power control module on PLC in the library, to that, the multistage resistance furnace control system design has been completed. Key words ：multi－segment resistance furnaceemperature control of furnace; variable integral PID control; PLC 目 录 摘 要 I Abstract II 1 绪 论 1 1.1 毕业设计的选题背景 1 1.2 多段电阻炉的研究状况及成果 1 1.3 多段电阻炉控制的发展过程 2 1.3.1 炉温的自动控制方式 2 1.4 本设计研究的主要内容 3 2 多段电阻炉温度控制的方案 4 2.1 炉温控制方法的选择 4 2.1.1 交流调功的介绍 4 2.2 炉温控制算法的选择 7 2.2.1 变速积分PID控制算法 7 2.2.2 变速积分PID与普通PID仿真比较 8 2.2.3 解