【毕业设计】基于模糊自适应PID的非线性系统控制研究.doc

基于模糊自适应PID的非线性系统控制研究 毕业设计（论文） 题 目 基于模糊自适应PID的 非线性系统控制研究 专 业 班 级 学 生 指导教师 2010 年 基于模糊自适应PID的非线性系统控制研究 专业：自动化 班级：自07-2班 作者： 指导教师： 职称：讲师 答辩日期：2006-06-18 摘 要 智能控制技术不断的发展，模糊控制已经成为智能控制的一个重要研究领域。模糊控制具有快速性的特点，而且同时还可以保持较小的超调量。但是，模糊控制的理论并不是很完善，而对它可能获得的控制性能也无法把握，其控制过程还会存在一定的稳态误差。PID控制结构简单、可靠性强，并且可以消除稳态误差的优点，但其性能取决于参数的整定情况，其快速性和超调性之间的矛盾关系使它不一定满足被控对象的技术要求。 论文首先介绍了一般PID控制中常用控制算法，并介绍了PID调节器参数整定的方法。然后运用模糊数学的基本原理和方法，把规则的条件、操作用模糊集表示，把这些模糊控制规则以及相关的信息作为知识存入计算机的知识库中，计算机根据系统的实际响应运用模糊推理，提出了模糊自适应PID控制的控制规律。最后，对模糊控制器的设计进行了较为详细的说明并进行了系统仿真试验。 仿真和实验结果表明，本文设计的基于模糊自适应PID控制算法的控制器可以使系统具有良好的动静态控制效果，很好的满足系统要求的性能指标。 关键词：非线性控制，自适应PID，模糊控制  Abstract With the intelligent control continually develop, fuzzy control which has become much important in intelligent control area. Fuzzy control has the advantage of quickness, at the same time, it can keep small over setting point. But fuzzy control is not very perfect in theory. In addition, the steady error exists in process control. PID control technique is reliable，stable and its structure is simple. It has the advantage to eliminate the error, but its efficiency depends on its factors. Because of the conflict between quickness and over setting point，it probably can not satisfy the control demand. This paper first introduces the general PID control algorithm is commonly used in control, and introduced the PID controller tuning method. Then use the basic principles of fuzzy mathematics and methods , sets the conditions of the rules and the operation expressed by fuzzy . These fuzzy control rules and the related information as knowledge stored in the computer knowledge library. According to the actual response of the computer system using fuzzy reasoning, a fuzzy adaptive PID control law was proposed. Simulation and experimental results show that the design of control algorithm based on fuzzy adaptive PID controller allows the system has good dynamic and static c