›› 2011, Vol. 31 ›› Issue (1): 1-7.doi: 10.3780/j.issn.1000-758X.2011.01.001

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Semi-empirical Method for Force Specification in Force Limited Vibration Test

LI  Zheng-Ju1, MA  Xing-Rui2, HAN  Zeng-Yao1   

  1. (1 China Academy of Space Technology, Beijing 100094)(2 China Aerospace Science and Technology Group Co., Beijing 100037)
  • Received:2010-05-07 Revised:2010-09-20 Published:2011-02-25 Online:2011-02-25

Abstract: The force limited vibration test can alleviate the over testing phenomenon generated by the resonant frequency in the acceleration-controlled vibration test. Force specification estimation is a prerequisite for the force limited vibration test. The principle of force limited vibration test was introduced. And the calculation method for semi-empirical coefficient was derived by the two degree of freedom system. Furthermore, the force specification of some spacecraft payload was caculated in the random vibration test. The results show that this method is reasonable to estimate the force specification.

Key words: Vibration test, Force limited specification, Semi-empirical method, Two degree of freedom system, Spacecraft