基于逻辑框图的卫星健康评估方法

Satellite health assessment method based on logic block diagram

摘要:

针对目前无法准确量化反映在轨卫星健康状态的问题，提出一种基于卫星部组件逻辑连接关系的健康状态分层评估模型，用任务健康度和任务风险度定量表示卫星状态。在部件层，选取关键遥测参数指标，通过统计历史健康数据及查阅设计资料建立部件级非线性无量纲评估模型；在组件层，通过各部件的逻辑连接关系分别建立评估模型；在分系统层，利用组件层得到的结果及各组件的逻辑连接关系，结合模糊层次分析（fuzzy analytic hierarchy process，FAHP）和变权理论，建立分系统健康状态评估模型。最后，通过某卫星正常运行时期和异常运行时期的在轨遥测数据验证，结果表明，该评估模型具有正确性。

Abstract:

In view of the current inability to accurately quantify the health status of on-orbit satellites, A health state hierarchical evaluation model based on the logical connection relationship of satellite components is proposed. Using task health and mission risk to quantitative representation of satellite status. At the element level, Establish a component level nonlinear dimensionless evaluation model by statistical historical health data and reviewing design data. At the component level, Establish an evaluation model by logical connection of each element. At the subsystem level, Using the results of component layer and the logical connection relationship of each component, combined with fuzzy analytic hierarchy process and variable weight theory to establish health assessment model for subsystem. At last, Verification of on-orbit telemetry data through the normal data and abnormal data, The results show that the evaluation model is correct.