《先进PID控制算法研究及仿真》-毕业论文.doc

摘 要 PID控制是最早发展起来的控制策略之一，由于其算法简单，鲁棒性好和可靠性高，被广泛应用于工业过程控制，尤其用于可简历精确数学模型的确定性控制系统。而实际生产过程往往具有非线性、时变不确定性，难以建立精确的数学模型，应用常规PID控制器不能达到理想的控制效果。为了达到使PID控制能适应复杂的工况和高指标的控制要求，人们对PID控制进行了改进，出现了各种新型PID控制器，对于复杂对象，其控制效果远远超过常规PID控制。本文主要选取两种先进PID控制算法：专家PID控制算法和模糊自整定PID控制算法，对典型纯迟延二阶系统对象进行控制仿真。在化工、炼油、冶金、玻璃等一些复杂的工业工程当中，被控对象除了容积迟延外，往往不同程度的存在纯迟延，具有纯迟延的过程被公认为是较难控制的过程，因此，纯迟延系统一直受到人们的关注，成为重要的研究课题之一，对此类问题的研究具有重要的理论和实际意义。我们选择以纯迟延系统为研究对象，并和常规PID控制进行对比，来得出先进PID控制算法更能适应非线性、时变不确定性的复杂系统的控制要求的结论。 关键词：智能控制；专家PID控制；模糊自整定PID控制；纯迟延二阶系统 ABSTRACT The PID control is a development to get up at the earliest stage of control one of the strategies.Because its calculate way be simple.Drive extensive application at the industry process control.Particularly used for can mathematics model of the resume precision really settle sex control system.But the actual production line usually hasnt line,the hour change indetermination.Hard establishment the mathematics model of the precision.Application normal regulations PID the controller cant attain ideal of control effect.For attaining to make PID control ability orientation complications of work condition and Gao index sign of control request.People carried on an improvement to the PID control. Appeared various new PID controller.For complications object, its control effect is far far above the normal regulations PID control.This text the main selection be two kinds of forerunner PID control calculate way:expert PID control calculate way and misty from whole settle PID control calculate way.Pure to typical model delay two rank system the object carry on control to imitate true.At chemical engineering, oil refining, metallurgy, glass...etc. some complications of industry engineering in the middle.Drive control object in addition to capacity delay,usually dissimilarity degree of existence pure delay.The process had pure delay drive generally accepted for is more difficult control of process.Therefore,The pure delay system has been be subjected to people of concern.The re