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자료유형
학술저널
저자정보
Roy, Nicolas (Top Modal) Violin, Maxime (Airbus Defence & Space) Cavro, Etienne (Intespace)
저널정보
테크노프레스 Advances in aircraft and spacecraft science Advances in aircraft and spacecraft science 제5권 제2호
발행연도
2018.1
수록면
187 - 204 (18page)

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The sine sweep base excitation test campaign is a major milestone in the process of mechanical qualification of space structures. The objectives of these vibration tests are to qualify the specimen with respect to the dynamic environment induced by the launcher and to demonstrate that the spacecraft FE model is sufficiently well correlated with the test specimen. Dynamic qualification constraints lead to performing base excitation sine tests using a sine sweep over a prescribed frequency range such that at each frequency the response levels at all accelerometers, load cells and strain gages is the same as the steady state response. However, in practice steady state conditions are not always satisfied. If the sweep rate is too high the response levels will be affected by the presence of transients which in turn will have a direct effect on the estimation of modal parameters. A study funded by ESA and AIRBUS D&S was recently carried out in order to investigate the influence of sine sweep rates in actual test conditions. This paper presents the results of this study along with recommendations concerning the choice of methods.

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