Launch loads, both mechanical and acoustic, are the prime driver of spacecraft structural design. Passive approaches for acoustic attenuation are limited in their low frequency effectiveness by constraints on total fairing mass and payload volume constraints. Active control offers an attractive approach for low frequency acoustic noise attenuation inside the payload fairing. Smart materials such as piezoceramics can be exploited as actuators for structural-acoustic control. In one active approach, structural actuators are attached to the walls of the fairing and measurements from structural sensors and/or acoustic sensors are fed back to the actuators to reduce the transmission of acoustic energy into the inside of the payload fairing. In this paper, structural-acoustic modeling and test results for a full scale composite launch vehicle payload fairing are presented. These analytical and experimental results fall into three categories: structural modal analysis, acoustic modal analysis, and coupled structural-acoustic transmission analysis. The purpose of these analysis and experimental efforts is to provide data and validated models that will be used for active acoustic control of the payload fairing. In the second part of the paper, this closed-loop acoustic transmission reduction is implemented and measured on a full-scale composite payload fairing.


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    Titel :

    Active Structural-Acoustic Control for Composite Payload Fairings


    Beteiligte:
    R. M. Glaese (Autor:in) / E. H. Anderson (Autor:in)

    Erscheinungsdatum :

    1999


    Format / Umfang :

    13 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Active structural-acoustic control for composite payload fairings

    Glaese, Roger M. / Anderson, Eric H. | SPIE | 1999



    Active Control of Structural-Acoustic Systems: Noise Reduction in Payload Fairings

    Vadali, S. / Das, A. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 1996


    Structural Optimisation of Payload Fairings

    Santschi, Y. / Eaton, N. / Verheyden, S. et al. | British Library Conference Proceedings | 2012


    Power Consumption for Active Acoustic Control of Launch Vehicle Payload Fairings

    Griffin, S. F. / Lane, S. A. / Leo, D. J. | British Library Online Contents | 2000