Title: Online identification of process systems in the frequency domain

Authors: Ya-Gang Wang, Xiao-Ming Xu, Wen-Jian Cai

Addresses: School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China. ' School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China. ' School of Electrical and Electronic Engineering, Nanyang Technological University, BLK S2, Nanyang Ave, Singapore, 639798, Singapore

Abstract: In this paper, a new online identification technique for single-input single-output processes in the frequency domain is proposed. The method can identify multiple points on process frequency response over the important frequency range of interest. Consequently, an accurate transfer function can be obtained directly by matching the model in the frequency domain. The application on closed-loop test has been employed to show both effectiveness and practicality of the method.

Keywords: online identification; frequency response; process systems; SISO processes; transfer function.

DOI: 10.1504/IJCAT.2011.042225

International Journal of Computer Applications in Technology, 2011 Vol.41 No.1/2, pp.11 - 16

Available online: 01 Sep 2011 *

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