基于可重构度的在轨卫星多级健康评估方法

目前在轨卫星健康评估主要采用加权方法,其主要问题是对卫星系统高冗余、可重构特性体现不足,且评估模型权重参数的确定过于依赖专家经验。针对以上问题,提出了基于可重构度的在轨卫星健康状态评估方法,以可重构度指标刻画卫星的高冗余、可重构和非线性等结构特性对系统健康状态的影响。在部件级水平上,采用非参数回归方法综合多元参数评估健康状态。从部件级到系统级,通过建立基于可重构度的系统结构树模型进行加权综合,实现卫星多级系统的健康状态评估。通过某卫星姿态控制系统的高保真仿真案例分析进行验证,结果表明所提方法对卫星的健康管理具有实用价值。

Multi-level health evaluation method for on orbit satellites based on reconfigurable degree#br#

At present, the main methods for evaluating the multi-level health status of on orbit satellites are the weighted synthesis methods. However, these methods cannot adequately characterize the high redundancy and reconfigurability of the satellite system, and the weight parameters are seriously determined by subjective judgment or expert experience. In order to describe the influence of the structural characteristics of the satellite system, such as high redundancy, reconfigurability and nonlinearity, a method for evaluating the multi level health status of the on orbit satellite based on reconfigurable degree is proposed. At the component level, the non parametric regression method is used to evaluate the health status. From the component level to the system level, the system can be evaluated by building a tree structure model based on the degree of reconfiguration. The simulation results of a satellite attitude control system show that the proposed method is of practical value to the health management of satellites.