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Comparison of three modeling approaches for a thermodynamic cooling system with time-varying delay
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Tan, Ai Hui, Cham, Chin Leei and Godfrey, Keith R. (2015) Comparison of three modeling approaches for a thermodynamic cooling system with time-varying delay. IEEE Transactions on Instrumentation and Measurement, 64 (11). pp. 3116-3123. doi:10.1109/TIM.2015.2440555 ISSN 0018-9456.
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Official URL: http://dx.doi.org/10.1109/TIM.2015.2440555
Abstract
In this paper, the modeling of a thermodynamic cooling system is considered, with the emphasis on dealing with the time-varying delay. A detailed characterization of the system output is performed first in the frequency domain, which successfully yields information relating to the location in the physical structure, which causes the time-varying delay. Three approaches are compared for modeling this delay: 1) using an adaptive fractional delay; 2) using an adaptive tapped delay line; and 3) using a polynomial delay. In addition, it is shown that the use of a carefully designed perturbation signal with harmonic suppression is advantageous in this case, as the percentage output power contained in the nonexcited harmonics can serve as a measure of the relative variance of the delay since the system is found to be largely linear.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
Journal or Publication Title: | IEEE Transactions on Instrumentation and Measurement | ||||||
Publisher: | IEEE | ||||||
ISSN: | 0018-9456 | ||||||
Official Date: | November 2015 | ||||||
Dates: |
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Volume: | 64 | ||||||
Number: | 11 | ||||||
Page Range: | pp. 3116-3123 | ||||||
DOI: | 10.1109/TIM.2015.2440555 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access |
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