基于Copula函数的多性能参数雷达电路板可靠性评估

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如何快速准确地评估雷达装备的可靠性是目前研究的重要课题,＂多参数、模型复杂、难计算＂是其中的主要问题,为此,以某型雷达18V20k Hz信号板为对象,利用加速试验数据进行可靠性分析。通过对试验数据的分析,选择2个具有代表性的性能退化参数,利用Wiener过程描述其退化过程,考虑各参数之间的相关性,运用Copula函数建立了基于多性能参数的可靠性分析模型,采用了MCMC方法进行参数估计,解决模型过于复杂难以估计的问题。最后通过雷达电路板电冲击试验验证了该方法的有效性,同时也为多性能参数下雷达板级电路可靠性分析提供了技术支撑。

How to quickly and accurately assess the reliability of radar equipment is an important research topic,＂ Multiple parameters, model complexity, difficult to calculate＂ is the main problems. Therefore, this paper made an electric impact accelerate i degradation test for 18V20 kHz signal PCB of radar, conducted a reliability analysis with the accelerated test data. It chose two typical performance parameters from the testing data, Wiener process was used to describe the degradation process and Copula function was used to describe the dependency of two performance parameters, MCMC method was used to parameter estimation in order to solve the problem of the model is too complex to...