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Aeroengine airworthiness safety verification method

An aero-engine and verification method technology, which is applied in the field of aero-engine airworthiness safety verification, can solve problems such as complex calculation process, assumption of failure without considering the dynamic characteristics of aero-engine, inaccurate results, etc.

Inactive Publication Date: 2018-11-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0014] The main purpose of the present invention is to provide an aero-engine airworthiness safety verification method, which solves the shortcomings of traditional safety analysis and verification methods based on manual methods, such as complicated calculation process and inaccurate results, and solves the problems of existing analysis methods. The method does not consider the dynamic characteristics of aero-engines and assumes that the failures are independent

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  • Aeroengine airworthiness safety verification method

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Embodiment Construction

[0070] In order to make the technical solution of the present invention clearer and clearer to those skilled in the art, the present invention will be described in further detail below in conjunction with the examples and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0071] Such as figure 1 As shown, an aero-engine airworthiness safety verification method provided in this embodiment describes the dynamic behavior of the aero-engine system through the dynamic logic gates introduced in the dynamic fault tree to describe the temporal logic relationship, and the fault between the aero-engine components Modeling of the timing relationship, and formalize the generated dynamic fault tree, convert it into a DTMC model, then describe and express the DTMC model through the method of probabilistic model detection, and carry out the airworthiness safety requirement attributes Formal verification includes the following steps:

[0072]...

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Abstract

The invention discloses an aeroengine airworthiness safety verification method, and belongs to the technical field of system safety verification. According to the aeroengine airworthiness safety verification method, dynamic behaviors of an aeroengine system are described through introduced dynamic logic gates describing temporal logic relationships in a dynamic fault tree, temporal relationships among aeroengine component faults are modeled, formalized specification is carried on the generated dynamic fault tree, the same is converted into a DTMC model, then the DTMC model is described and expressed through a method of probabilistic model detection, and formalized verification is carried out on airworthiness safety requirement attributes. According to the method, the temporal relationshipswhich aeroengine system fault occurrence has are considered, and the problem that traditional analysis methods often assume that fault occurrence has independence is solved.

Description

technical field [0001] The invention relates to an aero-engine airworthiness safety verification method, in particular to an aero-engine airworthiness safety verification method combining fault tree and probability model detection, and belongs to the technical field of system safety verification. Background technique [0002] Aeroengines are complex in structure and often work in high-speed, high-temperature and harsh environments. Once a failure occurs, it may lead to catastrophic consequences. Therefore, in the process of engine development, safety design, analysis, evaluation and compliance verification must be carried out. Ensure that the developed engine can meet the relevant safety requirements. [0003] CCAR33-R2 "Aeroengine Airworthiness Regulations" is the minimum safety standard that aeroengines must meet. Among them, the 75th clause CCAR33-R2.75 clearly stipulates the safety requirements of the engine. The verification requirements of CCAR33-R2.75 are as follows...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/23
Inventor 黄志球宛伟健谢健葛晓瑜
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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