基于极点配置的汽温控制系统优化  

Optimization of steam temperature control system based on pole assignment

作　　者：李志明[1] 王文兰[1] 满文成 康潇[1] 

机构地区：[1]内蒙古工业大学电力学院,内蒙古呼和浩特010080

出　　处：《宁夏电力》2016年第1期63-66,共4页Ningxia Electric Power

基　　金：国家自然基金(61364009);内蒙古工业大学重点科学研究项目(ZD201320)

摘　　要：针对史密斯预估器在模型失配时其控制效果变差的缺陷,本文设计了一种基于极点配置的状态观测器构建的汽温控制系统模型。该模型通过极点配置的方法,使多个常系数一阶惯性环节构造的状态观测器逼近被控对象,观测器的输出经PD(比例-微分)控制器可以超前反馈到系统中,以克服滞后环节和系统不确定性的影响,其中微分作用,可以消除系统的动态偏差。同时,结合带有滞后环节的二阶被控对象对该优化模型进行仿真验证。仿真结果表明:该方法构建的汽温控制系统具有较好的动态性能和控制品质,为消除滞后环节对汽温控制系统的影响提供了一种有效途径。Aiming at the defect that when smith-predictor model mismatch,its control effect gets worse,a steam temperature control system model built on state observer based on pole assignment is designed. The model makes several constant coefficients first-order damp elements constructed state observer approximate the controlled object by using pole assignment,the observer output can make feedback in advance to the system by PD (Proportion-Differentiation)controller,so that to overcome the effect of lagging link and uncertainty of the system,and differential effect can eliminate the dynamic deviation of the system. Meanwhile,simulate the optimization model combined with a second-order controlled object which has an integration element. The simulation experiment shows that steam temperature control system by the method has better dynamic performance and control quality,which provides an effective way to eliminate the influence of lag link on the steam temperature control system.

关 键 词：汽温控制 极点配置 状态观测器 优化 仿真 

分 类 号：TK333[动力工程及工程热物理—热能工程]