Broadband Radiation Modes: Estimation and Active Control

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    Abstract

    In this paper we give a formulation of the most efficiently radiating vibration patterns of a vibrating body, the radiation modes, in the time domain. The radiation modes can be used to arrive at efficient weighting schemes for an array of sensors in order to reduce the controller dimensionality. Because these particular radiation modes are optimum in a broadband sense, they are termed broadband radiation modes. Methods are given to obtain these modes from measured data. The broadband radiation modes are used for the design of an actuator array in a feedback control system to reduce the sound power radiated from a plate. Three methods for the design of the actuator are compared, taking into account the reduction of radiated sound power in the controlled frequency range, but also the possible increase of radiated sound power in the uncontrolled frequency range.
    Original languageUndefined
    Pages (from-to)1295-1305
    Number of pages11
    JournalJournal of the Acoustical Society of America
    Volume111
    Issue number3
    DOIs
    Publication statusPublished - Mar 2002

    Keywords

    • EWI-870
    • METIS-207634
    • IR-43877

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