Method for ensuring high temperature working stress limit of airplane antiskid braking control box

A technology of working stress and anti-skid brakes, which is applied in the testing of machines/structural components, measuring devices, instruments, etc., and can solve problems such as unreliable data

Inactive Publication Date: 2012-04-25
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-temperature working stress limit test of other foreign electronic products is carried out under non-working conditions. The method of only applying environmental stress without applying working stress i

Method used

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  • Method for ensuring high temperature working stress limit of airplane antiskid braking control box

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment is a test for determining the high-temperature working stress limit of the first type of control box, and the test sample is a set of control boxes. The design of the test sample has been improved in view of the high temperature problem in the development test.

[0028] The test of this embodiment uses a reliability enhancement test box model UHS1200, a digital multimeter, a signal source and an oscilloscope.

[0029] The concrete process of this embodiment is:

[0030] Step 1, determine the test parameters. The test parameters include the starting point of the test temperature, the temperature rise step and the temperature rise rate. The starting point of the test temperature in this example is 20°C. Before the temperature reaches 70°C, the temperature rise step is 10°C. After the temperature reaches 70°C, the temperature rise step is 1°C, and the smaller the more accurate; the temperature rise rate is 20°C / min.

[0031] Step 2, heating the test sa...

Embodiment 2

[0036] This embodiment is a test for determining the high-temperature working stress limit of the second type of control box, and the test sample is a set of control boxes. The design of the test sample has been improved in view of the high temperature problem in the development test.

[0037] The test of this embodiment uses a reliability enhancement test box model UHS1200, a digital multimeter, a signal source and an oscilloscope.

[0038] The concrete process of this embodiment is:

[0039] Step 1, determine the test parameters. The test parameters include the starting point of the test temperature, the temperature rise step and the temperature rise rate. The starting point of the test temperature in this example is 40°C. Before the temperature reaches 90°C, the temperature rise step is 10°C. After the temperature reaches 90°C, the temperature rise step is 3°C, and the smaller the more accurate; the temperature rise rate is 40°C / min.

[0040] Step 2, heating the test s...

Embodiment 3

[0045] This embodiment is a test for determining the high-temperature working stress limit of the third type of control box, and the test sample is a set of control boxes. The test sample has been partially designed to improve the high temperature problem in the development test.

[0046] The test of this embodiment uses a reliability enhancement test box model UHS1200, a digital multimeter, a signal source and an oscilloscope.

[0047] The concrete process of this embodiment is:

[0048] Step 1, determine the test parameters. The test parameters include the starting point of the test temperature, the temperature rise step and the temperature rise rate. The starting point of the test temperature in this example is 60°C. Before the temperature reaches 100°C, the temperature rise step is 10°C. After the temperature reaches 100°C, the temperature rise step is 5°C, and the smaller the more accurate; the temperature rise rate is 60°C / min.

[0049] Step 2, heating the test samp...

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Abstract

The invention provides a method for ensuring the high temperature working stress limit of an airplane antiskid braking control box. The method is used for ensuring the high temperature working stress limit of the control box by applying high temperature stress to the control box step by step. The heating step length for the step-by-step temperature rise of the control box is from 1 DEG C to 10 DEG C, the heating speed rate is from 20 DGE C/min to 60 DGE C/min, the temperature is kept at 5min after each temperature rise value reaches a specified numerical value, the time for balancing the temperature of the control box is remained, a performance test is performed, the test time is 5min, and the sum of the temperature keeping time in each step is 10min; and the high temperature working stress limit of a sample piece is obtained according to the step-by-step temperature rise test method. The method is used for applying working stress to the control box in the test process, and ensuring the initial value of the high temperature working stress limit by ensuring the temperature value during faulting, so that a test method for ensuring the high temperature working stress limit of the control box and ensuring the high temperature fault hidden danger in an accelerating way can be formed.

Description

technical field [0001] The invention relates to the field of electronic products of a landing gear control system of a transport aircraft. Specifically, it is a method for determining the high-temperature working stress limit of an aircraft anti-skid brake control box. Background technique [0002] The control box is the control unit in the aircraft electric anti-skid braking system, which is designed with the functions of take-off line braking, anti-skid function during landing braking, grounding protection function during landing, inter-wheel protection of left and right landing gear wheels during landing, etc. A variety of functions, any one of which does not meet the design requirements is a failure. In the present invention, the working performance of the control box refers to the quantitative requirements of the above-mentioned various functions. [0003] In order to ensure the reliability and safety requirements of the control box, the high-accelerated life test tec...

Claims

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Application Information

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IPC IPC(8): G01M99/00
Inventor 乔建军田广来黄智商海东张谦刘忠平
Owner XIAN AVIATION BRAKE TECH
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