Advances in aircraft and spacecraft science

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Transient testing from LV / SC coupled analysis by new shock synthesis

  • Received : 2016.11.08
  • Accepted : 2017.10.04
  • Published : 2018.03.25
⟨ Previous Next ⟩

Abstract

This paper deals with the idea to replace the usual high-level sine sweep test on shaker at system level, very severe, by a low level one completed by a transient test in the same configuration, in order to be more representative of the real environment, thus limiting over testing and improving the payload comfort. The problem of the transient test specification is first discussed. The proposed solution is to derive from LV/SC coupled analyses a shock response spectrum corresponding to two damping ratios. Then, the question of adequate shock synthesis is tackled. A new method with a given spectrum is considered for better potential and accuracy than the usual wavelets. A campaign on the Intespace bi-shaker devoted to system level showed its capability to perform the resulting test with one spectrum. First investigations to extend this approach to two spectra are in progress.

Keywords

References

  1. ESA-ESTEC, ECSS-E-HB-32-26A (2013), Spacecraft Mechanical Load Analysis Handbook.
  2. Girard, A., Dupuis, P.E. and Bugeat, L.P. (1998), "Improved shock characterisation", Proceedings of the European Conference on Spacecraft Structures, Materials and Mechanical Testing, Braunschweig, Germany.
  3. Girard, A., Roy, N. and Calvi, A. (2012), "Notching in sine testing: Understanding and practice", Proceedings of the European Conference on Spacecraft Structures, Materials and Environmental Testing, ESA-ESTEC, Noordwijk.
  4. Lalanne, C. (2009), Mechanical Vibration and Shock Analysis, John Wiley & Sons, 2nd Edition, 2, Mechanical Shock.