大型相控阵雷达整机外场可靠性试验可分为联调联试和验证试验两个阶段。针对现有的整机可靠性评估仅利用验证试验阶段较少的试验数据,导致整机可靠性评估结果置信度低的问题,提出一种基于改进序化关系模型的整机可靠性评估方法。该方法通过构建新的联合似然函数对传统序化关系模型进行改进,并融合联调联试数据和验证试验数据来评估整机的可靠性水平。实例表明:该方法能提高整机平均故障间隔时间在同一置信水平下的估计下限,缩短平均故障间隔时间的估计区间。

The whole system outfield reliability test of large scale phased array radar can be divided into two stages, the debugging stage and the verification test stage. Since merely using verification test data, the reliability evaluation result of traditional reliability evaluation method is low confidence level. To solve the above problem, a whole system outfield reliability evaluation method is proposed. In this method, the traditional ordering relationship model is improved by establishing the new likelihood function of the two test stage data, and the whole system reliability is evaluated by integrating the debugging data with the verification test data. The example indicates that the proposed method can improve the lower confidence limit of the whole system mean time between failures with the same confidence level, and shorten the estimation interval of the mean time between failures.