计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (27): 236-238.

• 工程与应用 • 上一篇    下一篇

液位系统的多模型广义预测控制研究

李灿军1,彭 辉2   

  1. 1.湖南网络工程职业学院 信息工程系,长沙 410004
    2.中南大学 信息科学与工程学院,长沙 410083
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-09-21 发布日期:2011-09-21

Multiple-model generalized predictive control of water-level system

LI Canjun1,PENG Hui2   

  1. 1.Department of Information & Engineering,Hunan Network Engineering Vocation College,Changsha 410004,China
    2.School of Information Science & Engineering,Central South University,Changsha 410083,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-09-21 Published:2011-09-21

摘要: 用多模型的广义预测控制器对复杂的非线性液位系统进行仿真控制。通过在覆盖工况的若干个平衡点采用最小二乘法离线辨识建立多个线性模型,形成非线性系统的多模型表示,然后对各个子模型分别设计子控制器,采用基于相对残差的方法来实现控制增量的加权以获取控制增量。通过对单容液位系统的仿真,表明该方法的有效性。

关键词: 多模型, 预测控制, 非线性系统, 多模型广义预测控制

Abstract: Generalized predictive controller using multiple models of complex nonlinear of liquid level control system is simulated.The offline identification of a number of linear models using least squares method at the different equilibrium points which covers the operating rang,the multiple-model set of nonlinear systems is taken shape.Based on each offline model of the set,a local GPC controller is designed.Different sub-controllers have different weighted increments.The appropriate control increment is the weighted-sum of sub-controllers.The simulation result of a single-tank system proves the effectiveness of the method.

Key words: multiple model, predictive control, nonlinear system, multiple-model generalized predictive control