液位对象的一种非线性广义预测控制策略研究  

Nonlinear Generalized Predictive Control Applied to Liquid-level System

作　　者：程辉[1] 秦廷[1] 陈宗海[1] 

机构地区：[1]中国科学技术大学自动化系,安徽合肥230027

出　　处：《计算机仿真》2006年第9期333-335,共3页Computer Simulation

摘　　要：近似线性化是针对非线性系统的一种系统设计方法。该文针对液位系统建立机理模型,基于此机理模型,在工作点附近将其机理模型近似线性化,即很小的区域内其根据Taylor展开式将其近似一阶展开,并结合广义预测控制算法,提出了一种针对水箱液位系统的预测控制策略,通过在线辨识水箱模型的未知参数,从而对系统液位进行控制。仿真结果表明,该控制策略能够很好地跟踪设定值,并且对于设定值变化和系统参数的摄动等,均具有良好的自适应能力。Approximate linearization is a design method for nonlinear system. A mechanical model is established for liquid - level system. The mechanical model is approximately expanded for the first order with Taylor Series Expansion in a very small region near the operating point. Combining approximate linearization with generalized predic- tive control strategy, the unknown parameters of liquid - level system can be identified on line and the liquid - level system can be controlled. Simulations reveal that the control strategy obtains good results and has good adaptive ability on water tank with time - varying parameters.

关 键 词：近似线性化 广义预测控制 液位对象 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]