Random vibration tests and acoustic tests are typical environmental testing approaches for verifying the dynamic environmental adaptability of a satellite, which should be selectively carried out on the ground before launch. Existing test criteria suggest that large spacecraft should be excited in a reverberation chamber, whereas a shaker should be used for a small spacecraft. With the development of an experimental technique of environment simulation, the combined vibration and acoustic (vibro-acoustic) testing technique and the coupling effect are increasingly investigated for reproducing a more realistic environment and avoiding an overtest or an undertest. This paper describes a combined vibro-acoustic test of a full-scale prototype satellite in detail. The equivalence between random vibration and acoustics excitation for satellite ground testing is discussed. Then the vibro-acoustic coupling influence distribution on the satellite is experimentally investigated by using a defined reduction ratio factor. Finally the inhibition of high-frequency sound pressure caused by the cavity resonance is quantitatively measured to show the attenuation center frequency of sound pressure spectrum.


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    Title :

    Experimental Research on Combined Vibro-Acoustic Test of a Satellite


    Contributors:
    Gao, Haiyang (author) / Yan, Tingfei (author) / Fang, Guiqian (author) / Xiang, Shuhong (author) / Li, Xinming (author) / Liu, Zhaoyan (author)

    Published in:

    Publication date :

    2020-11-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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