一类固定床反应器的动态模型简化

Simplification of Dynamic Model for a Fixed-Bed Reactor

提出对固定床反应器非线性分布参数模型用双线性状态模型近似,给出一种基于参数估计技术的双线性化方法。基于块脉冲函数的参数估计算法用来确定模型的系数矩阵。结果表明,这样产生的双线性模型能此线性近似模型在较宽的工作范围内精确地近似反应器的动态特性。

The approximation of a fixed-bed reactor model with nonlinear and distributed parameters by using a bilinear state model is presented, and a bilinearization approachbased on parameter estimation technique is given. The coefficient matrices of the bilinear model are determined by means of the estimation algorithm based on block-pulse functions. The results show that the reduced bilinear model developed can approximate the reactor dynamics more accurately than the linear one over a much wider range around the operating state.