Method for determining reconfigurability of satellite control system

Abstract

The invention discloses a method for determining the reconfigurability of a satellite control system. The method comprises the following steps of: (1) constructing a satellite control system function tree and connecting the different levels of the function tree by means of AND Gate or OR Gate according to the function implementation mode of the satellite control system; (2) according to the AND / OR relationship between different levels of the function tree, determining the cut-set family C of the function tree by using the descending method or the ascending method, wherein the elements of the cut-set family are cut-sets and the cut-sets are component sets for implementing the functions of the satellite control system; (3) performing absorption treatment on the cut-set family C determined in the step (2) to obtain the minimum cut-set family Cmin of the function tree, wherein the elements of the minimum cut-set family Cmin are minimum cut-sets cmin and the minimum cut-sets cmini are the sets of least components required for implementing the functions of the satellite control system; (4) performing failure mode effect analysis (FMEA) on the satellite control system to determine the failure mode, failure occurrence probability and failure severity of the satellite control system; (5) determining the reconfigurable degree (Gamma-i) of the failure mode i; and (6) determining the reconfigurable rate of the satellite control system.

Description

technical field

[0001] The invention belongs to the field of aerospace and relates to a method for determining the reconfigurability of a satellite control system based on a function tree. Background technique

[0002] With the development of science and technology, satellites have played an irreplaceable role in various fields such as national defense, military, communications, and meteorology. In order to cope with various failures that may occur in satellites in orbit and improve the quality of operation, it is necessary to ensure that effective measures are taken in time to minimize the impact of failures after failures occur. This is to overcome the inherent reliability of products at the system level and improve the reliability of satellite operations. Effective means of sex and life extension. Since satellites cannot be maintained on-orbit, generally only reconfiguration can be used to restore system functions. Therefore, in order to improve the fault handling capabi...

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