dc.contributor.author |
Kar, Kenneth |
en |
dc.contributor.author |
Swain, Akshya |
en |
dc.contributor.author |
Raine, Robert |
en |
dc.date.accessioned |
2012-03-07T22:31:37Z |
en |
dc.date.accessioned |
2012-03-07T22:39:01Z |
en |
dc.date.issued |
2009 |
en |
dc.identifier.citation |
Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME 131(1):1-10 2009 |
en |
dc.identifier.issn |
0022-0434 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/13362 |
en |
dc.description.abstract |
The present study addresses the problem of estimating time-varying time constants associated with thermocouple sensors by a set of basis functions. By expanding each timevarying time constant onto a finite set of basis sequences, the time-varying identification problem reduces to a parameter estimation problem of a time-invariant system. The proposed algorithm, to be called as orthogonal least-squares with basis function expansion algorithm, combines the orthogonal least-squares algorithm with an error reduction ratio test to include significant basis functions into the model, which results in a parsimonious model structure. The performance of the method was compared with a linear Kalman filter. Simulations on engine data have demonstrated that the proposed method performs satisfactorily and is better than the Kalman filter. The new technique has been applied in a Stirling cycle compressor. The sinusoidal variations in time constant are tracked properly using the new technique, but the linear Kalman filter fails to do so. Both model validation and thermodynamic laws confirm that the new technique gives unbiased estimates and that the assumed thermocouple model is adequate. |
en |
dc.publisher |
American Society of Mechanical Engineers |
en |
dc.relation.ispartofseries |
Journal of Dynamic Systems Measurement and Control-Transactions of the ASME |
en |
dc.relation.replaces |
http://hdl.handle.net/2292/13359 |
en |
dc.relation.replaces |
2292/13359 |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from: http://www.sherpa.ac.uk/romeo/issn/0022-0434/ |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.title |
Identification of Time-Varying Time Constants of Thermocouple Sensors and its Application to Temperature Measurement |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1115/1.3023111 |
en |
pubs.issue |
011005-1 |
en |
pubs.volume |
131 |
en |
dc.rights.holder |
Copyright: American Society of Mechanical Engineers |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
93503 |
en |
pubs.org-id |
Engineering |
en |
pubs.org-id |
Department of Electrical, Computer and Software Engineering |
en |
pubs.record-created-at-source-date |
2010-09-01 |
en |