Reliability verification method for multi-stage flying-sling integrated system

By constructing fault trees and calculating the minimum cut set probability, the problem of accurate detection and verification of weak links in the integrated flight and launch system was solved, achieving efficient and standardized reliability verification and improving the system's operational reliability.

CN117842376BActive Publication Date: 2026-06-23BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIHANG UNIV
Filing Date
2024-01-05
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

In the integrated design of aircraft and engines, it is difficult to accurately identify and verify the weak links in different flight phases, resulting in a high failure rate. Moreover, existing methods are not suitable for efficient and standardized reliability verification.

Method used

Fault tree analysis is used to construct the fault tree of the integrated flight and engine system, identify weak links, and generate a reliability verification process by calculating the probability and importance of the minimum cut set, which is then embedded into the design of the corresponding flight phase for execution.

Benefits of technology

It improves the relevance and standardization of reliability verification for the integrated flight system at different flight stages, simplifies the complexity of fault prediction, accurately locates weak points, and enhances the overall operational reliability of the system.

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Abstract

The application discloses a reliability verification method for a multi-stage flying and launching integrated system, which finds weak links of the flying and launching integrated system that may fail in each flight stage, matches corresponding reliability verification work items of the weak links, generates the reliability verification work items into a reliability verification process based on model-based system engineering, and embeds the process into a corresponding stage of designing the flying and launching integrated system and executes the process, thereby improving the pertinence, foresight and normativity of reliability testing of the flying and launching integrated system in the design stage. In addition, when the weak links are found, the construction of a fault tree solves the problem that it is difficult to accurately detect the weak links of the flying and launching integrated system in different flight stages due to different structural compositions and different causal relationships of the flying and launching integrated system in different flight stages.
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