Online multivariable process identification in the frequency domain. (6th July 2010)

• Record Type: Journal Article
• Authors: Wang, Ya-Gang; Xu, Xiao-Ming; Cai, Wen-Jian
• Is Part Of: International journal of modelling, identification and control. Volume 10:Number 1/2(2010)
• Page Start: 106
• Page End: 111
• Publication Date: 2010-07-06
• Subjects: multivariable process identification -- frequency response -- modelling -- simulation -- control; Engineering -- Methodology -- Periodicals; Science -- Methodology -- Periodicals; 001.42
• Languages: English
• ISSNs: 1746-6172

Abstract

In this paper, a new technique for online multivariable process identification in the frequency domain is presented. Set-point changes in the control loops are performed so that the process frequency-response matrix is estimated with signal decomposition and frequency spectrum analysis method, and accurate transform-function matrix is identified as well. The required input and output data are obtained while the processes are still in normal closed-loop operation. Simulation example is given to show both effectiveness and practicality of the identification method for multivariable processes.