Method for determining diagnosability of angular rate measuring sensor of satellite based on correlation matrix

Abstract

The invention discloses a method for determining the diagnosability of an angular rate measuring sensor of a satellite based on a correlation matrix. The method comprises the following steps of: (1) dividing functional modules of the angular rate measuring sensor, establishing a signal flow diagram of each module, and marking specified measuring points in the signal flow diagram; (2) performing failure mode and effect analysis (FMEA) on the angular rate measuring sensor, determining the failure mode, failure occurrence probability, failure severity and failure effects of the angular rate measuring sensor, and according to the failure effects, adding the failure mode into the signal flow diagram; (3) establishing a failure-measuring point correlation matrix; (4) assigning the failure-measuring point correlation matrix; (5) according to the failure-measuring point correlation matrix D which is established in the step (4), performing failure detectability analysis on the angular rate measuring sensor; (6) according to the failure-measuring point correlation matrix D which is established in the step (4), performing failure isolability analysis on the angular rate measuring sensor; and (7) determining the diagnosability of the angular rate measuring sensor, and measuring the diagnosability according to failure detection rate RD and failure isolation rate RI.

Description

technical field [0001] The invention belongs to the field of aerospace, and relates to a method for determining the diagnosability of a satellite angular rate measurement sensor based on a correlation matrix. 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 ensure the safety and operation quality of satellites in orbit, a series of safeguard measures have been taken in the process of design, production and testing, so as to improve the inherent reliability of products and reduce the probability of failure in orbit. However, since the satellite is a large and complex system involving multi-disciplinary and multi-field technologies, and it has been flying for a long time in a harsh and complex space environment, coupled with the limitations of components, raw materials and processing levels, it is inevitabl...

AI Technical Summary

Problems solved by technology

If the angular rate measurement sensor fails to be detected and isolated in time, it will lead to serious accidents such as attitude loss and energy depletion. Therefore, the diagnosable design of the angular rate measurement sensor is the key to the development of satellite control systems

However, at present, our country mainly relies on the experience of designers to analyze the fault handling ability of angular rate measurement sensors, and cannot systematically and quantitatively determine the diagnosability of angular rate measurement sensors, resulting in poor diagnosability design of angular rate measurement sensors , causing some faults to fail to be detected and diagnosed after they occur on-orbit

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