控制回路中的阀门迟滞补偿方法  

Stiction Compensation for Valves in Control Loops

作　　者：付川[1] 丁维明[1] 

机构地区：[1]东南大学能源与环境学院,江苏南京210096

出　　处：《自动化仪表》2010年第10期8-11,共4页Process Automation Instrumentation

基　　金：国家"863"计划资助项目(编号:2009AA04Z158;2006AA05A107)

摘　　要：迟滞是阀门最常见的问题之一,它会引起控制回路的振荡,造成能量的损失和产品质量的下降。目前解决阀门迟滞问题的方法主要有Knocker迟滞补偿、减弱或去除控制器的积分作用等方式。但Knocker迟滞补偿方法会导致阀门的频繁动作,增加阀门的磨损;而减弱或去除控制器的积分作用方式会导致稳态误差。通过对这两种方法的优劣比较,提出了一种改进的迟滞补偿方法。该方法可有效减少阀门动作的次数,延长阀门的使用寿命。Stiction is one of the most common valve problems that causes oscillation of control loops and results in energy loss and inferior quality of products.At present,there are two more useful methods to solve this problem,one is Knocker stiction compensation,and another one is reducing and detuning the integral effect of the controller.However,Knocker＇s approach induces aggressive stem movement that will increase wear out of valves,while the second method brings in stable error.Through comparing the advantages and disadvantages of these two methods,the improved stiction compensation is proposed.The method effectively reduces the movement of valve to extend the working life of the valves.

关 键 词：阀门迟滞 补偿 建模 控制回路 PID控制 主汽温 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]