Spacecraft Quasi-Static Test Performed on a Shaker

Details Spacecraft Quasi-Static Test Performed on a Shaker Spacecraft Quasi-Static Test Performed on a Shaker

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.558..203s&link_type=abstract

Proceedings of the 5th International Symposium on Environmental Testing for Space Programmes Noordwijk, The Netherlands (ESA SP-

Computer Science

Scientific paper

The TECSAR S/C, a Synthetic Aperture Radar (SAR) technology demonstration satellite is being developed by Israel Aerospace Industries (IAI). The Structural Model (SM) has successfully completed its qualification program at the IAI-MBT testing center. The TECSAR Structural Model (SM) Quasi-Static (QS) test was performed as part of the structural qualification program that is comprised of sinusoidal vibration, acoustic and pyro-shock tests. The QS test was performed on a shaker by a controlled sinusoidal sweep vibration. This method was selected because of its simplicity and cost and time savings considerations. It also enabled using the same specimen for all tests, QS as well as sine vibration, acoustic and pyro-shock tests, with only slight modifications. Thus all the test objectives were fully achieved in a most cost- effective way. This paper discusses the rationale and advantages of quasi-static testing on a shaker. It provides detailed information about actual QS implementation and a summary of the QS test that was performed on TECSAR S/C. Following a brief description of the TECSAR S/C and a definition of the quasi-static qualification loads, the test objectives and the optional testing methods are detailed with a discussion of the considerations and decision to select the way to perform this test on a shaker. Test specimen descriptions including the TECSAR SM installation and test instrumentation (load cells, accelerometers, strain gages) are summarized. Photogrammetry technique was used to establish residual dimensional deviations. The quasi-static test is then described with test results validation, evaluation and comparison to FEM results. Finally, the main conclusions are given.

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