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Estimating the frequency response of a system in the presence of an integrator
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Widanage, Widanalage Dhammika, Omara, N., Schoukens, J. and Van Mierlo, J. (2015) Estimating the frequency response of a system in the presence of an integrator. Control Engineering Practice, Volume 35 . pp. 1-11. doi:10.1016/j.conengprac.2014.10.007
An open access version can be found in:
Official URL: http://dx.doi.org/10.1016/j.conengprac.2014.10.007
Abstract
A system with an integrator is one which does not have a steady-state gain at zero frequency. An example is a battery; when subjected to a constant charge or discharge current the voltage will continuously increase or decrease until the cell reaches its maximum/minimum cut-off voltage and not reach a steady-state value. Frequency response estimation techniques that minimises leakage errors lead to significant errors at low frequencies of the response. This paper develops and presents a technique whereby the low frequency errors are eliminated. The technique is applied over the frequencies of interest, except DC frequency, and gives better results over windowing and a local polynomial frequency response estimation method. As such, an accurate low frequency response and noise power spectrum can now be obtained which in turn can be used for estimating accurate parametric models.
| Item Type: | Journal Article | ||||||||||
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| Subjects: | T Technology > TJ Mechanical engineering and machinery | ||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||||
| Library of Congress Subject Headings (LCSH): | System identification, Frequency response (Dynamics), Engineering -- Statistical methods, Automatic control. | ||||||||||
| Journal or Publication Title: | Control Engineering Practice | ||||||||||
| Publisher: | Elsevier Ltd | ||||||||||
| ISSN: | 0967-0661 | ||||||||||
| Official Date: | February 2015 | ||||||||||
| Dates: |
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| Volume: | Volume 35 | ||||||||||
| Page Range: | pp. 1-11 | ||||||||||
| DOI: | 10.1016/j.conengprac.2014.10.007 | ||||||||||
| Status: | Peer Reviewed | ||||||||||
| Publication Status: | Published | ||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||
| Funder: | European Commission (EC), Flemish Government (Methusalem), Federal Government IAP VII | ||||||||||
| Open Access Version: |
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