Method for identifying reconfigurable weak link of satellite control system

A satellite control system and weak link technology, applied in the aerospace field, can solve problems such as inability to guide satellite reconfigurability design, inability to system analysis, etc., to reduce redundant backup, clear physical meaning, and reduce system weight and power consumption Effect

Active Publication Date: 2012-10-24
BEIJING INST OF CONTROL ENG
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Problems solved by technology

However, the above method cannot analyze the weak links of the system from the perspective of reconfiguration, and cannot guide the reconfigurability design of satellites

Method used

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  • Method for identifying reconfigurable weak link of satellite control system
  • Method for identifying reconfigurable weak link of satellite control system
  • Method for identifying reconfigurable weak link of satellite control system

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Embodiment

[0081] The present invention is described in detail by taking the attitude control function of a typical high-orbit satellite when jet control is used in orbit as an example. In engineering practice, the satellite control system has a variety of components, so the function tree is also relatively complex. In order to illustrate the simplicity of the specific implementation, the composition of the satellite control system is simplified here, and the composition is as follows:

[0082] ① 2-way earth sensor (ES master and ES backup): under normal circumstances, one ES works, and the other cold backup. If necessary, two ESs can also work at the same time.

[0083] ② 4-way sun sensor (SS): including pitch SS master, roll SS master, pitch SS backup, roll SS backup. The pitch SS master and pitch SS backup are mutually active and backup, and the rolling SS master and rolling SS backup are mutually active and backup.

[0084] ③Propulsion system: The propulsion system includes multiple...

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Abstract

The invention provides a method for identifying reconfigurable weak link of a satellite control system, comprising the following steps of: (1) constructing a satellite control system function tree, and connecting different layers of the function tree by an AND gate or an Or gate according to the function implementation way of the satellite control system; (2) determining the path set group R of the function tree by a downlink method or an uplink method according to the OR / AND relationship between the different layers of the function tree, wherein elements in the path set group are path sets and when all components in the path sets fail, the general function of the satellite control system is lost; (3) performing simplifying absorption on the path set group R determined in the step (2), thereby obtaining the minimum path set group Rmin of the function tree; (4) determining the fault tolerance Ti of the satellite control system; and (5) taking the function implemented by the path set corresponding to the minimum Ti as the reconfigurable weak link of the satellite control system.

Description

technical field [0001] The invention belongs to the field of aerospace and relates to a satellite reconfigurable weak link identification method based on the minimum path set of 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/08
Inventor 刘成瑞王南华何英姿王大轶
Owner BEIJING INST OF CONTROL ENG
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