| Citation: | GONG Xiangrui, LYU Zhenzhou, LIU Hui, et al. Uncertainty analysis of failure of dynamic system and its efficient algorithm[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(7): 1460-1469. doi: 10.13700/j.bh.1001-5965.2016.0533(in Chinese)
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In order to study the failure of dynamic system when the failure rates of components are uncertain, a new method is proposed to analyze the system failure probability when function time is given and function time when the threshold of failure probability is shown in system. Meanwhile, a new importance measure technique is developed to estimate the impact of components' failure rates on system failure probability and function time in dynamic system. In this paper, the Monte Carlo procedure is given to solve the proposed indices. The fractional moments-based maximum entropy method is used to obtain failure probability density function in system efficiently. An efficient technique with multiplication dimensionality reduction is developed to estimate two importance measure indices. Valve control system and civil aircraft electro-hydraulic actuator system are presented to illustrate the rationality and efficiency of the proposed method.
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