Civil aircraft multi-fault risk identification, evaluation and calculation method

Abstract

The invention discloses a civil aircraft multi-fault risk identification, evaluation and calculation method. The method comprises fault risk identification, relation analysis and level evaluation. Fault risk identification: aiming at a similar model operation fault event set, determining civil aircraft operation fault reasons from field guarantee, flight implementation, aircraft guarantee and flight training, analyzing fault types from human errors, aircraft faults and environmental influences, and reversely reasoning potential fault modes in a civil aircraft operation process from structuralstrength, a system and a power device; dividing fault relations into independent faults and associated faults, conducting fault mechanism analysis on components with serious / disaster modes, determining the probability of the independent faults through replacement records or a fault tree, and determining the probability of the associated faults through a causal relation chain and an extended faulttree; risk level assessment includes probability of occurrence and severity. The potential danger of part faults is evaluated in the civil aircraft operation stage, the maintenance guarantee efficiency of the aircraft is improved, and the civil aircraft operates safely.

Description

technical field [0001] The invention belongs to the technical field of risk analysis and evaluation of civil aircraft operation, and in particular relates to a multi-fault risk identification and evaluation calculation method of civil aircraft considering fault relationships among components. Background technique [0002] Since 1991, there have been 17,701 aviation accidents worldwide. With the increase of global air transportation demand, flight safety has gradually been paid attention to. Under extreme working conditions such as high temperature, high pressure, high speed, high strength, variable load, etc., civil aircraft may have single-component independent failures or related failures between components, causing performance degradation and endangering flight safety. The impact on civil aviation flight safety is manifested in many aspects. There are various types of accidents in different aircraft types / systems, and the same accident has various causes. There are mainl...

AI Technical Summary

Problems solved by technology

At present, the international research on probabilistic risk assessment of civil aircraft has accumulated rich experience in system assessment and basic data. my country's self-designed and produced aircraft have gradually accumulated safety experience in the process of obtaining airworthiness certification and putting into operation, but there is a lack of specific Risk assessment model and calculation formula for independent faults and associated faults of civil aircraft component fault relationship expansion

Only relying on a single component failure risk assessment model without considering the effects of related failures between components will cause great safety hazards and affect the economics of civil aircraft operations

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