Aircraft task reliability modeling method based on dynamic characteristics

Abstract

The invention relates to an aircraft task reliability modeling method based on dynamic characteristics. The method includes the steps of firstly, conducting aircraft system analysis and task analysis, and establishing an aircraft task result state set; secondly, selecting an event tree (ET) method, and establishing an aircraft task process reliability reference model; thirdly, analyzing aircraft initial / middle task reliability characteristics, selecting a dynamic failure tree (DFT) method, a Bayesian network (BN) method, a Markov method and the like, and establishing an initial / middle task reliability characteristic model; fourthly, establishing an aircraft task reliability comprehensive model by compositing the initial / middle task reliability model. By means of the method, the dynamic characteristics in the aircraft complicated task process can be more accurately depicted, the influences of dynamic changes of aircraft system composition at different task stages in the aircraft task process on the aircraft task reliability are comprehensively reflected, and the established task reliability model can be more accurate.

Description

technical field [0001] The invention relates to a dynamic characteristic-based aircraft mission reliability modeling method, which belongs to the technical field of system reliability. Background technique [0002] At present, countries are competing to develop aircraft with multiple uses such as repeated use, long-term on-orbit stay, orbital space maneuvering, and on-orbit mission execution. This type of aircraft has complex structures and functions, many mission stages, and experiences various mission environments, and the mission reliability is affected by the above factors. Therefore, in the process of aircraft development and key mission planning, it is necessary to carry out analysis and evaluation of mission reliability in advance. The establishment of a reliability evaluation model that can fully reflect the characteristics of the aircraft mission process is the basis for the analysis and evaluation of the aircraft mission reliability. [0003] At present, the esta...

AI Technical Summary

Problems solved by technology

[0011] The problem solved by the present invention is: overcome the deficiencies in the prior art, provide a kind of aircraft task reliability modeling method based on dynamic characteristics, can more accurately describe the dynamic characteristics in the complex task process of aircraft, comprehensively reflect the aircraft task process The impact of dynamic changes in aircraft system composition in different mission stages on aircraft mission reliability makes the established mission reliability model more accurate

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