Method for testing acceleration reliability of antiskid brake control box of airplane

A technology of anti-skid brakes and test methods, applied in the direction of electrical testing/monitoring, etc., can solve the problems of high test cost, long test period, and poor excitation failure effect, and achieve the effect of sufficient excitation failure and short test time

Active Publication Date: 2012-04-25
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
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Problems solved by technology

[0007] In order to overcome the shortcomings of long test period, high test cost and poor excitation failure effect in the p

Method used

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  • Method for testing acceleration reliability of antiskid brake control box of airplane
  • Method for testing acceleration reliability of antiskid brake control box of airplane
  • Method for testing acceleration reliability of antiskid brake control box of airplane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] This embodiment is an accelerated reliability test of an aircraft anti-skid brake control box.

[0061] The product involved in this embodiment is a control box that has been put into use. Aiming at the unqualified failure speed in use, it is required to pass the reliability test to increase the MTBF of the control box from the original 270h to 1000h. The MTBF of 1000h is 5000h according to the conventional test time. In order to save the test time, this embodiment adopts the accelerated method to conduct the reliability test of the control box.

[0062] The control box used in this embodiment has completed the corrective measures for the fault, and passed the low temperature working stress limit test, high temperature working stress limit test, vibration working stress limit test and high accelerated stress screening. After passing these measures, the reliable performance indicators are verified.

[0063] The test equipment used in this embodiment is a three-comprehen...

Embodiment 2

[0118] In this embodiment, aiming at the unqualified anti-skid performance of the control box during use, the reliability increase work is carried out, and the MTBF of the control box is increased from 1050h to 6400h by accelerating the reliability increase test. The MTBF of 6400h is about: 5×6400h=32000h according to the conventional test time. This embodiment adopts an accelerated reliability test method.

[0119] Before the test, we analyzed and improved the found failure modes; and passed the low temperature working stress limit test, high temperature working stress limit test, vibration working stress limit test and high accelerated stress screening. After passing these measures, the reliability achieved Indicators are verified. According to the comprehensive evaluation of these measures taken, the MTBF has reached 8000h, which is greater than the required 6400h, and the conditions for starting the test are met.

[0120] The test equipment used in this embodiment is a t...

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Abstract

The invention relates to a method for testing the acceleration reliability of an antiskid brake control box of an airplane. Temperature stress, vibration stress and humidity stress are comprehensively applied, and an electrifying working condition capable of stimulating a fault is selected in a test process, thus the working frequency of the control box is improved, the fault hidden trouble of the control box is stimulated, and the test time is shortened. The test process is carried out according to a test cross section in a circulating way until the required reliability index is met. In the method provided by the invention, the electrifying working condition and the working frequency in service are converted into the test time, and the working frequency adopted in the test process is higher than the actual working frequency in service. After the test is finished, the met reliability index is evaluated according to a method in GJB (Guo Jun Biao) 1407 and the confidence degree recommended in GJB1407, and the confidence degree for evaluating the reliability index is 90%. In the method provided by the invention, a pulsating current of 0-40mA is applied, fault hidden troubles of the control box in various working conditions are verified, an acceleration reliability test on the control box is realized, and test data can be used for evaluating the reliability index of the control box.

Description

technical field [0001] The invention relates to a civil aircraft anti-skid brake control box, in particular to an accelerated reliability test method for testing the performance of the aircraft anti-skid brake control box in the test process. Background technique [0002] There are two current reliability test methods for aircraft anti-skid brake control boxes, one is carried out according to GJB899 "Reliability Identification and Acceptance Test", and the other is carried out according to GJB1407 "Reliability Growth Test". [0003] According to the method of reliability test according to the existing standard, the use time and the test time have a corresponding relationship of 1:1. Due to compliance with the real environment timing, according to the application, when the reliability index MTBF (mean time between failures) of the control box is between 1000h and 8000h, the shortest test time in the GJB899 standard test plan is plan 17, and the reliability of plan 17 is The ...

Claims

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Application Information

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IPC IPC(8): G05B23/02
Inventor 乔建军田广来刘忠平张谦柯少昌黄智郭育秦
Owner XIAN AVIATION BRAKE TECH
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