The problem of multi-channel output-only identification of the time-varying dynamics of an extendable prismatic arm structure under random excitation is considered. The identification is based on three simultaneously measured non-stationary vibration response signals obtained during a single experiment in which the arm extends from its fully retracted to its fully extended position. Non-stationary Functional Series Vector Time-dependent AutoRegressive (FS-VTAR) and AutoRegressive Moving Average (FS-VTARMA) methods are used, while critical comparisons with corresponding Pseudo-Linear Regression (PLR-VTAR and PLR-VTARMA) methods employing recursive models are also made. The superiority of the Functional Series methods, and particularly of the FS-VTARMA method, in capturing the time-varying dynamics is demonstrated.


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    Title :

    Multi-channel output-only identification of an extendable arm structure under random excitation: A comparison of parametric methods


    Contributors:


    Publication date :

    2009-06-01


    Size :

    2027571 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




    EXTENDABLE STRUCTURE

    SLADE RICHARD PAUL | European Patent Office | 2017

    Free access

    Extendable structure

    SLADE RICHARD PAUL | European Patent Office | 2017

    Free access