On-orbit health status assessment method and system for satellites based on reconfigurability

Abstract

The invention discloses a reconfigurable degree-based satellite on-orbit health state assessment method. The method comprises the following operation steps of determining a system hierarchical structure according to a physical structure of a satellite system, so as to obtain a system structure tree; determining the reconfigurable degree of each hierarchical element layer by layer; collecting remote measurement data of remote measurement parameters under a component health state; extracting characteristic quantity data of the component health state according to the remote measurement data, and determining a component health state index value by using a multivariate state estimation method or a non-parametric regression method; and determining an element contribution degree, determining a contribution degree of the previous hierarchical element associated with the next hierarchical element in the system structure tree by adoption of a hierarchical analysis method, and obtaining a system health state index value so as to assess the system health state. The invention furthermore provides an assessment system which comprises a data acquisition module, a data pre-processing module, a system structure tree edition module, a data analysis module and a data visualization module, so as to realize the multistage health state assessment from the components to the system.

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 in the evaluation of the health status of satellites in orbit. The main problem is that the high redundancy and reconfigurable characteristics of the satellite system are not reflected enough, and the determination of the weight parameters of the evaluation model is too dependent on subjective judgment. For example, the weighted average combination method does not reflect the influence of satellite system fault reconstruction ability; when the state number method defines the state number by the special relationship of the system components, the state number of the redundant relationship needs to be given by experience; In the evaluation from component to s...

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Problems solved by technology

[0002] At present, the weighting method is mainly used in the evaluation of the health status of satellites in orbit. The main problem is that the high redundancy and reconfigurable characteristics of the satellite system are not reflected enough, and the determination of the weight parameters of the evaluation model is too dependent on subjective judgments.

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