Identification from step responses with transient initial conditions

被引:44
作者
Ahmed, Salim [1 ]
Huang, Biao [1 ]
Shah, Sirish L. [1 ]
机构
[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada
关键词
step response; initial conditions; time delay;
D O I
10.1016/j.jprocont.2007.07.009
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Over the last few years there have been some interesting developments in system identification from step and step-like responses. New methods have been proposed to simultaneously estimate model parameters and the delay from step responses that require the process to be at steady state when the step is applied. To deal with transient initial conditions, methods based on pulse responses and the so called piece-wise step tests and iterative algorithm based on a single step response have also been proposed. In this article we propose a new method to estimate model parameters and the delay from a single step response in the presence of transient initial conditions, which does not require iteration. The performance of the proposed procedure is demonstrated through simulations as well as applications on experimental data from a continuous heating tank process and a mixing process. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:121 / 130
页数:10
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