On-orbit satellite health status assessment method and system based on component function map

Abstract

A satellite in-orbit health status evaluation method based on a component and function mapping diagram comprises the following steps: determining system layer structures according to a physical structure of a satellite system, and determining a mapping relationship between components and functions of the system according to function relationships among the components of the satellite system and among the layer structures of the system; determining characteristic quantity parameters, and mean values and standard deviations of the characteristic quantity parameters in a healthy status; according to observed characteristic quantity data, calculating health status indicator values of the components through a characteristic parameter weighted fusion method; determining actual contributions of elements on a lower layer to an upper layer, obtaining relative weights based on the actual contributions of the elements, and successively determining a health status value of each layer of the satellite system; and according to set healthy thresholds and set dangerous thresholds, evaluating the health status of the satellite system. The method provided by the invention has the advantages that characteristics of the system, such as high redundancy, reconfigurability and nonlinearity, can be better described, and the defect of the traditional method that the nonlinearity and emergence of the complex system cannot be reflected is overcome.

Description

technical field [0001] The invention belongs to the field of on-orbit satellite health management and fault diagnosis, and in particular relates to an on-orbit satellite health state evaluation method and evaluation system based on measured data. Background technique [0002] At present, the weighting method is mainly used to evaluate the health status of satellites in orbit, that is, the health status of the system elements is weighted to obtain the health status of the system. The main problem is that it is difficult to reflect the complex redundancy relationship, reconfigurable characteristics and nonlinear relationship of the satellite system. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose a satellite on-orbit health status evaluation method and evaluation system based on the component function map in view of the deficiencies of the current satellite on-orbit health status evaluation method. The system struc...

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Problems solved by technology

[0002] At present, the evaluation of the health status of satellites in orbit mainly adopts the weighting method, that is, the health status of the system elements is weighted to obtain the health status of the system. The main problem is that it is difficult to reflect the complex redundancy relationship, reconfigurable characteristics and nonlinear relationship of the satellite system.

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