On the Uncertainty of Identification of Civil Engineering Structures using ARMA Models

P. Andersen, Rune Brincker, Poul Henning Kirkegaard

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    Abstract

    In this paper the uncertainties of modal parameters estimated using ARMA models for identification of civil engineering structures are investigated. How to initialize the predictor part of a Gauss-Newton optimization algorithm is put in focus. A backward-forecasting procedure for initialization of the predictor is proposed. This procedure is compared with a standard prediction error method optimization algorithm in a simulation study. It is found that the uncertainties can be reduced by a proper selection of the initial conditions for the predictor.
    OriginalsprogEngelsk
    UdgivelsesstedAalborg
    ForlagDept. of Building Technology and Structural Engineering, Aalborg University
    StatusUdgivet - 1994
    NavnFracture and Dynamics
    Nummer58
    Vol/bindR9437
    ISSN0902-7513

    Bibliografisk note

    PDF for print: 12 pp.

    Presented at the 13th International Model Analysis Conference, Nashville, Tennessee, February, 13-16, 1995

    Emneord

    • Modal Parameters
    • Auto-Regressive Moving Average Models
    • ARMA Models
    • Gauss Newton Algorithm

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