摘要：温度控制在工业控制中一直是富有新意的课题，对于不同的控制对象，有着不同的控制方式和模式。温度系统惯性大、滞后现象严重，难以建立精确的数学模型，给控制过程带来很大难题。本论文以电锅炉为研究对象，研究一种改进的控制方案，以达到系统稳定、调节时间短且超调量小的性能指标。借助matlab对电锅炉PID控制系统和模糊控制系统进行仿真分析。结果表明当采用PID算法时，系统的超调量与调节时间不能同时满足技术要求。当采用模糊控制时，超调量和调节时间虽同时满足技术要求，但出现了稳态误差。因此本文将模糊控制的智能性与PID控制的通用性、可靠性相互结合。设计了一种参数自整定模糊PID控制器，采用模糊推理的方法实现PID参数Kp、Ki、Kd的在线整定，经仿真研究，其效果达到了电锅炉温度控制系统的性能指标，是一种较为理想的智能性控制方案。5110
关键字： 模糊PID控制；温度控制；MATLAB；仿真,毕业论文
Fuzzy-PID-based electric temperature control
Abstract：Temperature control is an innovative topic in industry. To different control object, there are different methods and modes. But it is difficult to control well because of characteristics of the temperature itself, such as its great inertia, serious time-lag and the difficulty to establish an accurate mathematical model of the object. A duty in this thesis is to study a kind of appropriate control method to the temperature of the electric boiler. Its technology requirements are: regulating time must be short, overshoot must be small and the control system must be stable. The PID control system and fuzzy control system are simulated by using MATLAB. Experimental results illustrate that the PID control is used in the system, regulating time and overshoot always cannot achieve the specification. When fuzzy control is used, regulating time and overshoot always can achieve the specification, but system cause steady-state error. So it comes to a new method of combining them together. The parameters of Kp, Ki, and Kd are adjust by fuzzy inference. Experimental results illustrate that the fuzzy PID parameters controller achieve the system performance index. The method of fuzzy PID control is a ideal method.
KeyWords：fuzzy-PID control; temperature control; MATLAB; simulation
目 录
1 绪论 1
1.1 课题的提出和意义 1
1.2 温度控制系统控制方案 1
1.3 本文的工作 3
2 模糊PID控制基础 4
2.1 常规PID控制 4
2.1.1 模拟PID控制 4
2.1.2 数字PID控制 5
2.1.3 PID控制器的优缺点 7
2.2 模糊控制 8
2.2.1 模糊控制系统组成 8
2.2.2 模糊控制的工作原理 9
2.2.3 模糊控制系统优缺点 10
2.3 模糊PID控制 10
2.3.1 自适应模糊PID控制基本特性 11
2.3.2 自适应模糊PID控制工作流程 12
3 电锅炉温度控制系统的设计 14
3.1 电锅炉系统数学模型的建立 14 MATLAB模糊-PID的电锅炉温度控制及仿真+文献综述:http://www.751com.cn/zidonghua/lunwen_2018.html