融合多源数据的Ka相控阵天线可靠性评估

Reliability Evaluation for Ka Phased Array Antenna Based on Multi-Source Data

为进一步提高卫星Ka相控阵天线可靠性评估的准确度,充分融合试验及在轨阶段的失效数据,在充分分析Ka相控阵天线物理结构及失效机理的基础上,采用贝叶斯更新及贝叶斯网络算法,融合各故障模式在试验及在轨阶段的失效数据,提出了动态的可靠性评估方法。分析结果表明,所提出的数据融合及可靠性评估方法能够有效关联传统可靠性方法中先验参数与运行数据,有效提高可靠性评估的可信性,为评估结果的优化提供了一种新的思路和方法。

The novel reliability assessment method combining multi-source data is proposed,the mechanism failure mode of Ka phased array antenna is analyzed,and Bayesian assessment and parameter optimization algorithm are employed in proposed method.Based on the data of ground test and on-orbit operation,a dynamic assessment simulation is accomplished,the result reveals that the information fusion for ground test and on-orbit data is realized by applying proposed method,and the advantages of proposed method are exhibited in the simulation results.