Guided ultrasonic waves, generated by air escaping through a small hole, have been measured with an 8 X 8 piezoelectric phased-array detector. Rapid location of air leaks in a spacecraft skin, caused by high-speed collisions with small objects, is essential for astronaut survival. Cross correlation of all 64 elements, one pair at a time, on a diced PZT disc combined with synthetic aperture analysis determines the dominant direction of wave propagation. The leak location is triangulated by combining data from two or more detector. To optimize the frequency band selection for the most robust direction finding, noise-field measurements of a plate with integral stiffeners have been performed using laser Doppler velocimetry. We compare optical and acoustic measurements to analyze the influence of the PZT array detector and its mechanical coupling to the plate.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Spacecraft leak location using structure-borne noise


    Weitere Titelangaben:

    Ortung von Lecks in Raumfahrzeugen mittels Körperschall


    Beteiligte:
    Reusser, R.S. (Autor:in) / Chimenti, D.E. (Autor:in) / Holland, S.D. (Autor:in) / Roberts, R.A. (Autor:in)


    Erscheinungsdatum :

    2009


    Format / Umfang :

    8 Seiten, 6 Bilder, 6 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch




    Leak detection in spacecraft using a 64-element multiplexed passive array to monitor structure-borne noise

    Holland, S.D. / Song, J.H. / Chimenti, D.E. et al. | Tema Archiv | 2006


    Leak location in spacecraft skin with ultrasonic arrays

    Reusser, R. / Holland, Steven D. / Chimenti, D.E. et al. | Tema Archiv | 2008


    Array-based acoustic leak location in spacecraft structures

    Reusser, R. / Holland, S.D. / Roberts, R.A. et al. | Tema Archiv | 2007


    SPACECRAFT-BORNE PROPULSION DEVICE

    KAWAGUCHI JUNICHIRO / SAITO YUJI | Europäisches Patentamt | 2023

    Freier Zugriff

    A spacecraft-borne gradiometer mission analysis

    Argentiero, P. / Garza-Robles, R. | TIBKAT | 1976