Method for identifying and analyzing single-point failure mode of launch vehicle

Abstract

The invention provides a method for identifying and analyzing a single-point failure mode of a launch vehicle. According to the method for identifying and analyzing the single-point failure mode of the launch vehicle, the severe degree is divided at system levels, the severe degree grade is fine divided in the identification and analysis process of a single-point failure, the division of the severe degree grade is more accurate, and necessary conditions are provided for accurate selection of an FTA top event. The single-point failure mode with the severe degree types being the type I and the type II and the occurrence possibility grades being the grade A, the grade B and the grade C is selected as the FTA top event, the causes of the launch vehicle single-point failure with a large influence on the consequence severe degree and high occurrence possibility are analyzed more deeply, the logical relationship and the interaction between all the causes are also fully analyzed, and effective input is provided for elimination and control of the single-point failure. According to the method for identifying and analyzing the single-point failure mode of the launch vehicle, the single-point failure is identified and controlled comprehensively through combination of the characteristics of FMEA and FTA, and the comprehensiveness and the effectiveness of the identification and the control of the single-point failure are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of aerospace quality and reliability analysis, and in particular relates to an identification and analysis method for a launch vehicle single-point failure mode. Background technique [0002] In recent years, the aerospace industry has entered a period of accelerated development. With the increase of launch tasks, the launch vehicle has ushered in a stage of high-intensity development and high-density launch. In recent years, the failure of two types of launch vehicles has sounded the alarm for us. No matter whether the model is under development or a mature model, quality and reliability work cannot be slack. A product failure in which a single point of failure would cause system failure and there is no redundant or alternate operating procedure to remedy it. Therefore, single-point failure, as the main technical risk of aerospace models, has always been highly concerned by the research and development tea...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of incomplete identification of single-point failures of current launch vehicle models, insufficient cause analysis, inconsistent control methods, and irregular countermeasures, the present invention provides an identification and analysis method for single-point failure modes of launch vehicles. The method combines FMEA and The characteristics of FTA, comprehensive identification and control of single point failure

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