MATLAB模糊PID的电锅炉温度控制及仿真 文献综述.doc

范文最新推荐 PAGE1 / NUMPAGES1 MATLAB模糊-PID的电锅炉温度控制及仿真+文献综述 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, 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. 3.1.1被控对象模型确立15 3.2电锅炉模糊控制器的建立16 3.3电锅炉模糊PID控制器设计18 3.3.1模糊PID控制器的输入输出变量及其模糊化19 3.3.2模糊PID控制器调整规则20 4仿真研究与比较24 4.1PID控制24 4.2电锅炉模糊控制25 4.3电锅炉模糊PID控制25 4.4比较与总结26 5总结与展望28 1绪论 1.1课题的提出和意义 温度是生产过程和科学实验中非常普遍而又十分重要的物理参数。在工业生产过程中，为了高效地进行生产，必须对生产工艺过程中的主要参数，如温度、压力、流量、速度等进行