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A Modeling Calculation Method of Failure Mode Frequency Ratio of Aircraft Braking System

A failure mode and braking system technology, applied in design optimization/simulation, special data processing applications, geometric CAD, etc., can solve problems such as large errors and non-unique frequency of failure modes

Inactive Publication Date: 2021-01-05
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The deficiencies of existing technologies at home and abroad are: 1. The information in the selection database has characteristics that vary from person to person, and may not be in line with the situation of new products; 2. The method of estimation also varies from person to person, and the frequency of failure modes is different The only case where the error is large

Method used

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  • A Modeling Calculation Method of Failure Mode Frequency Ratio of Aircraft Braking System
  • A Modeling Calculation Method of Failure Mode Frequency Ratio of Aircraft Braking System
  • A Modeling Calculation Method of Failure Mode Frequency Ratio of Aircraft Braking System

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Embodiment Construction

[0097] In this embodiment, the failure mode frequency ratio is calculated for a braking system of a civil aircraft. The braking system has various functions of take-off line braking, landing anti-skid braking, ground differential braking, parking braking, and emergency braking. The task time for each take-off and landing is 2h. Calculate the frequency ratio of each failure mode by modeling, calculate the hazard degree of each failure mode to the braking system, and finally calculate the hazard degree of all failure modes to the braking system.

[0098] Step 1, preparation work:

[0099] The first step is to list the supporting products, functions and failure criteria according to the technical specifications of the braking system, see Table 1.

[0100] Table 1 Supporting Products of Civil Aircraft Braking System

[0101]

[0102] In the second step, list the failure mode severity levels:

[0103] Referring to the provisions of GJB / Z1391 on the severity level of failure m...

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Abstract

The invention discloses a modeling calculation method for a frequency ratio of fault modes of an airplane brake system. By modeling the frequency ratio of the fault modes and calculating and determining the frequency ratio of the fault modes of the brake system, the accuracy of calculating fault mode criticalities is improved, and a basis is provided for making processing measures of the fault modes. Various fault mode criticalities of various products are summated to obtain the fault mode criticalities of the brake system. Then the fault mode criticalities of the brake system are sorted from high to low, and corresponding correction measures are made according to the fault mode criticalities. A conventional method for collecting information of similar products from a database and manually estimating the frequency ratio of the fault modes at home and abroad is changed to a method for quantitatively calculating the frequency ratio of the fault modes, so that the basis is provided for comprehensively weighing and making the fault correction measures, and the resource and energy waste caused by adoption of improvement on all the fault modes is reduced.

Description

technical field [0001] The invention relates to the field of failure analysis of civil aircraft braking systems, in particular to a calculation method for the frequency ratio of failure modes of civil aircraft braking systems. Background technique [0002] Article 5.5.2.2.3 of GJB / Z1391 stipulates: "α j Failure mode frequency ratio: The ratio of the number of occurrences of the jth failure mode of the product to all possible failure modes of the product. "GB7826 Chapter 5 describes the criticality as: "It is hoped to estimate the occurrence probability of the relevant failure mode and quantitatively describe the criticality of a failure effect. The quantification of the occurrence probability of the failure mode and the criticality of the failure effect helps to take the correct corrective measures, determine the focus of the corrective work, and establish a clear boundary between acceptable and unacceptable risks. "In probability theory, when the frequency tends to infini...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F30/15
CPCG06F30/15G06F30/20
Inventor 乔建军乔子骅
Owner XIAN AVIATION BRAKE TECH