Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0959-1524(00)00030-5
Title: Robust closed-loop identification with application to auto-tuning
Authors: Wang, Q.-G. 
Zhang, Y. 
Guo, X. 
Keywords: Closed-loop identification
FFT
IFFT
Process identification
Second-order plus dead-time models
Issue Date: Oct-2001
Source: Wang, Q.-G., Zhang, Y., Guo, X. (2001-10). Robust closed-loop identification with application to auto-tuning. Journal of Process Control 11 (5) : 519-530. ScholarBank@NUS Repository. https://doi.org/10.1016/S0959-1524(00)00030-5
Abstract: In this paper, a simple yet robust closed-loop identification method is proposed, and an auto-tuner is then constructed by combination with a new PID tuning rule. The method can accommodate a wide range of tests such as step and relay provided that the test produces steady state responses. Using the FFT, the process frequency response is first calculated from the recorded process input and output time responses to the closed-loop test. Then the process step response is constructed using the inverse FFT. A general second-order plus dead-time model is thus obtained using our newly developed technique on robust identification of process transfer function from step responses. Simulation examples and real time test show its effectiveness. © 2001 Elsevier Science Ltd. All rights reserved.
Source Title: Journal of Process Control
URI: http://scholarbank.nus.edu.sg/handle/10635/57293
ISSN: 09591524
DOI: 10.1016/S0959-1524(00)00030-5
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