Projects per year
Abstract
An on-line nonlinear FOPDT system identification method is proposed and applied to model the superheat dynamic in a supermarket refrigeration system. The considered nonlinear FOPDT model is an extension of the standard FOPDT model by means that its parameters are time dependent. After the considered system is discretized, the nonlinear FOPDT identification problem is formulated as a Mixed Integer Non-Linear Programming problem, and then an identification algorithm is proposed by combining the Branch-and-Bound method and Least Square technique, in order to on-line identify these time-dependent parameters. The proposed method is firstly tested through a number of numerical examples, and then applied to model the superheat dynamic in a supermarket refrigeration system based on experimental data. As shown in these studies, the proposed method is quite promising in terms of reasonable accuracy, large flexibility and low computation load. The study on the superheat also clearly showed time varying properties of superheat dynamic, which indicate some necessity of adaptive mechanism of efficient superheat control.
Original language | English |
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Title of host publication | Proceedings of the 37th Annual Conference of the IEEE Industrial Electronics Society, IECON11 |
Number of pages | 6 |
Publisher | IEEE Press |
Publication date | Nov 2011 |
Pages | 634-629 |
ISBN (Print) | 978-1-61284-969-0 |
DOIs | |
Publication status | Published - Nov 2011 |
Event | 37th Annual Conference on IEEE Industrial Electronics Society, IECON 2011 - Melbourne, Australia Duration: 7 Nov 2011 → 10 Nov 2011 |
Conference
Conference | 37th Annual Conference on IEEE Industrial Electronics Society, IECON 2011 |
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Country/Territory | Australia |
City | Melbourne |
Period | 07/11/2011 → 10/11/2011 |
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Nonlinear system identification and its application to fault detection and diagnosis
Yang, Z. & Sun, Z.
01/11/2008 → 30/06/2013
Project: Research