多元精馏推断控制的估计器研究

Modelling of Multicomponent Distillation Inferential Control

以苯精馏塔为背景，建立了一个非线性的推断估计器模型。在建模中，选用奇异值分解法来挑选控制塔板的位置，并对增益矩阵的构造方法作了改进：选用结合改进θ法的Ｗａｎｇ－Ｈｅｎｋｅ算法进行在线计算，并采用非对称型汽液平衡模型成功地解决了带侧线出料的复杂塔的估算型计算。在苯塔运用中计算速度快，收敛性好，对测量误差不甚敏感，能满足工业上的需要。

A non linear inferential estimator for benzene distillation column is developed in this paper. A singular value decomposition method is used to select the location of measuring temperatures and an efficient and robust algorithm based on the Wang Henke method with modified θ method is developed for online estimation. The estimated compositions of benzene product are insensitive to measurement errors.