电阻炉高精度温度控制.doc

电阻炉高精度温度控制


摘    要
本文介绍了电阻炉温度控制的原理，完成了电阻炉控制系统的数学建模，设计了一种自整定FUZZY一PID双模控制器，确定了双模复合控制算法，编写了相关软件对该模型的功能进行测试。该系统将模糊控制和PID控制有机结合。基本思想是：大误差时，系统采用模糊控制；小误差时，系统切换到PID控制。仿真结果表明，对于一阶纯滞后系统，该控制算法具有结构简单、动态响应速度快、稳态精度高、鲁棒性强的特点。并且，由于采用了继电自整定法，PID的三个参数能够实现自动整定，避免了人工整定的麻烦，实现了最佳控制。实验结果表明，在经过初启动时的短时间过渡过程后，全程的控温精度为士3摄氏度，在加热元件所能达到的最大升温速率下，系统升温速率任意可调;在不比自然降温快时，降温速率任意可调。相信经过进一步的完善后，系统将会取得很好的经济效益。关键词:电阻炉;模糊控制;PID控制;温度控制

Abstract
In this paper, temperature-controlled resistance furnace principle, the completion of the resistance furnace control system for mathematical modeling, the design of a self-tuning PID of a dual-mode controller FUZZY identified dual-mode hybrid control algorithms, the preparation of the relevant software to the model functions for testing. The system of fuzzy control and PID control of the organic integration. The basic idea is: big error, the system uses a fuzzy control; small error, the system switch to PID control. The simulation results show that for the first-order time delay system, the control algorithm is simple, fast dynamic response, steady-state and high precision, the characteristics of robustness. In addition, due to the fixed relay self-tuning, PID parameters can be achieved in three auto-tuning to avoid the trouble of people will be neat, to achieve the best control. The experimental results show that After a short period of time when starting the beginning of the transition process, the whole accuracy of the temperature 3 degrees Celsius with disabilities, in the heating elements can achieve the maximum heating rate, the system of arbitrary adjustable heating rate; in faster than natural cooling, the cooling rate arbitrary adjustable.Believe that, after further improvement of the system will be the economic benefits of good
Key words: The electric sintering furnace;Fuzzy control;PID control;    Self-tuning FUZZY一PID multiple control Temperature control

目  录
第一章　绪  论......................................................1
第二章  电阻炉温度控制系统原理......................................7
2.1电阻炉温度控制系统原理.......................................7
2.2控制系统中的晶闸管技术.......................................7
2.3控制对象的数学建模...........................................9
第三章  电阻炉的参数继电自整定PID控制.............................11
3.1 PID控制技术简介............................................11
3.2 PID参数继电自整定方法............................................12
3.2.1  PID参数继电自整定原理....................................12
3.2.2  继电特性参数的确定..........................................14
3.3ITAE最佳传递函数............................................15
第四章  电阻炉的模糊控制...........................................16
4.1常规模糊控制的基本原理.....................................16
4.2常规模糊控制系统的性能分析.................................21
4.3自整定Fuzzy-PID双模复合控制器..............................23
4.4不同控制器的仿真比较.......................................24
第五章电阻炉温度控制系统软件设计...................................26
5.1人机界面的设计.............................................26
5.2主控制程序的设计...........................................26
5.3实验结果...................................................32
第六章  全文总结...................................................35
参考文献...................................................................36