Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/91389
Title: A Fast Fourier Transform Approach for On-Line Monitoring of the Maximum Closed-Loop Log Modulus
Authors: Ju, J. 
Chiu, M.-S. 
Issue Date: Mar-1998
Citation: Ju, J.,Chiu, M.-S. (1998-03). A Fast Fourier Transform Approach for On-Line Monitoring of the Maximum Closed-Loop Log Modulus. Industrial and Engineering Chemistry Research 37 (3) : 1045-1050. ScholarBank@NUS Repository.
Abstract: A monitoring procedure incorporating the fast Fourier transform (FFT) technique is presented to identify the maximum closed-loop log modulus (Lc,max) on-line. The proposed method addresses several potential problems present in the previous methods, which are (1) too many relay tests are required, (2) the frequency search range is confined to the third quadrant, and (3) the identified value of LC,max cannot be used on-line to redesign the controller, if there is sufficient incentive to do so. Simulation results also show that the proposed method can identify LC,max rather accurately as compared to the previous methods.
Source Title: Industrial and Engineering Chemistry Research
URI: http://scholarbank.nus.edu.sg/handle/10635/91389
ISSN: 08885885
Appears in Collections:Staff Publications

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