文档介绍：内蒙古科技大学
本科生毕业设计说明书(毕业论文)
题目:锅炉汽包液位智能控制系统设计与仿真研究
锅炉汽包液位智能控制系统设计与仿真研究
摘要
锅炉是化工、发电、炼油、造纸和制糖等工业生产过程中必不可少的重要动力设备。因此,对锅炉设备的自动控制系统进行分析研究就显得尤为重要。
锅炉汽包液位控制是锅炉生产过程中最重要的环节。锅炉的大部分事故是由汽包液位控制不当而引起的,由于受到蒸汽负荷干扰而产生虚假液位,使控制器反向动作,进而引发汽包液位的大幅振动。本文针对锅炉汽包液位的动态特性,研究FUZZY-PID控制在锅炉汽包液位控制中的应用。
传统的锅炉汽包液位三冲量控制系统大都采用PID控制。而模糊控制不要求知道被控对象的精确数学模型,只需要操作人员的经验知识及操作数据,鲁棒性强,适合用于非线性、滞后系统的控制,但其静态性能不能令人满意,限制了它的应用。为消除模糊控制的稳态误差,本文将FUZZY-PID引入锅炉汽包液位的三冲量控制中,并利用Simulink分别在设定值及干扰作用下对控制系统进行仿真,结果表明,较之单纯的模糊控制和常规PID控制,这种控制效果较为理想,可满足锅炉的汽包液位控制要求。
关键词:汽包液位;PID控制;糊控控制;FUZZY-PID控制;仿真
The design and imitate resesrch of intellectual control system of boiler drum water level
Abstract
The boiler is absolutely necessary significant power plant of industry productions process such as the chemical industry,heatedible oil,generation of electrical energy,papermaking and refines sugar and so ,it is especially important to analyze and research the automatic control in the boiler installation.
Segment that the boiler drum water level control is the most significant in the process of boiler most accidents of boiler were caused by the unfit control of drum water level,which was due to the interference of steam to the drum,causing the false water level,making the reaction of controller,then arousing the large margin vibration of the drum water to the feather of the drum water level,we research the using of the fuzzy-pound control in the boiler drum water level control system.
The traditional control mode of three-variable in the drum water level mostly uses fuzzy control does not need precise mathematical model of the controlled object,it only needs the experience of operator and the data of operating,it has good robustness and is fit to control the system with nonlinearity and time lag,but its static characteristic is dissatisfied,which limits its is usual mode of three-variable drum water level in order to eliminate the static error that using fuzzy-PID control,