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Citation: Xu Dan, Liao Xun, Chen Yunxia, et al. Analysis of storage stability of accelerometers[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(2): 173-177. (in Chinese)

Analysis of storage stability of accelerometers

  • Received Date: 16 Jan 2012
  • Publish Date: 28 Feb 2013
  • Based on the finite element analysis(FEA) results of quartz flexible accelerometers, the stability of the scale factor changing with temperature and time was obtained. Then a kind of surface fitting method which was the product type based on least squares, was applied to fit the simulating data and build the accelerated degradation model of the stability of the scale factor. Considering the discrepancy of the product and the error in testing, the model was randomized. Furthermore, the variance was calculated by applying the first-order Taylor expansion, and then the accelerated degradation model with confidence was established. The analysis of the storage stability of accelerometers was conducted on the basis of the model on the condition of storage, and the storage stable period under the given criterion was also calculated. At the same time, the stability evaluation result was also given, that is whether the stability was satisfied with the demand during a period of time under the storage condition.

     

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