Optimal Selection of the Sampling Interval for Estimation of Modal Parameters by an ARMA- Model

Poul Henning Kirkegaard

    Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

    1 Citation (Scopus)

    Abstract

    Optimal selection of the sampling interval for estimation of the modal parameters by an ARMA-model for a white noise loaded structure modelled as a single degree of- freedom linear mechanical system is considered. An analytical solution for an optimal uniform sampling interval, which is optimal in a Fisherian sense, is given. The solution is investigated by a simulation study. It is shown that if the experimental length T1 is fixed it may be useful to sample the record at a high sampling rate, since more measurements from the system are then collected. No optimal sampling interval exists. But if the total number of sample points N is fixed an optimal sampling interval exists. Then it is far worse to use a too large sampling interval than a too small one since the information losses increase rapidly when the sampling interval increases from the optimal value.
    Original languageEnglish
    Title of host publication11th International Modal Analysis Conference : Febuary 1-4, 1993 Kissimme, Florida
    Number of pages7
    Volume1
    Place of PublicationBethel, Connecticut
    PublisherSociety for Experimental Mechanics
    Publication date1993
    Pages240-246
    ISBN (Print)0-912053-41-0
    Publication statusPublished - 1993
    EventThe International Modal Analysis Conference - Hyatt Orlando Hotel, Kissimmee, Florida, United States
    Duration: 1 Feb 19934 Feb 1993
    Conference number: 11

    Conference

    ConferenceThe International Modal Analysis Conference
    Number11
    LocationHyatt Orlando Hotel
    CountryUnited States
    CityKissimmee, Florida
    Period01/02/199304/02/1993
    SeriesIMAC
    Volume1
    ISSN1046-6770

    Keywords

    • Sampling Interval
    • ARMA-Models
    • Experimental Design

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  • Cite this

    Kirkegaard, P. H. (1993). Optimal Selection of the Sampling Interval for Estimation of Modal Parameters by an ARMA- Model. In 11th International Modal Analysis Conference: Febuary 1-4, 1993 Kissimme, Florida (Vol. 1, pp. 240-246). Society for Experimental Mechanics. IMAC, Vol.. 1