IMC-PID在水厂出水浊度控制中的仿真研究  

Simulation Study of IMC-PID in the Turbidity Control of Water Supply Plant

作　　者：肖术骏[1] 陶睿[1] 王秀[1] 郭佩佩[1] 朱学峰[1] 

机构地区：[1]华南理工大学自动化科学与工程学院,广州510640

出　　处：《自动化与仪表》2009年第1期36-38,共3页Automation & Instrumentation

基　　金：广东省科技计划项目(2005B10201005);佛山市禅城区产学研项目(2007B1038)

摘　　要：城市供水出水浊度过程是一个大惯性、大时滞、非线性、时变以及随机干扰多的难控对象,采用常规PID控制很难取得理想的控制效果。IMC-PID控制器的参数都以唯一和直接的方式与模型参数相关,并且只有一个在线可调整的参数——低通滤波器时间常数,其大小决定了系统的性能指标和鲁棒性。仿真研究表明,对于常用的一阶惯性加时滞工业对象模型,采用IMC-PID控制器可以取得良好的控制效果,当实际过程与模型不匹配时通过调整滤波器时间常数仍然可以达到比较好的控制效果。The turbidity control system of municipal water supply plant is a non-linear and time-variant process with a large time constant and large dead time,which is always difficult to control. It is difficult to get perfect performances to use the conventional PID controller. It makes against on-line tuning because the conventional PID controller need to set 3 parameters. Parameters of IMC-PID depends on the internal model. And there is only one online tuning parameter. That is the time constant of the low pass fiher,which decides the performances and the robustness of the system. For plant of FOPDT,IMC-PID controller is adopted to obtain good performances. Acceptable performance can also be obtained by tuning time constant of the low pass filter when the model doesn＇t match with the real process.

关 键 词：浊度控制 内模控制 IMC—PID 模型匹配 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]