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Aviation airplane wheel brake channel fault detection method

A fault detection and wheel technology, used in aircraft component testing, mechanical component testing, and machine/structural component testing, etc. It can solve problems such as mechanical sticking of brake control valves, abnormal brake circuits, and mechanical failures of switching valves.

Active Publication Date: 2022-02-25
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to overcome the shortcomings of abnormal brake circuit, mechanical sticking of brake control valve, mechanical failure of switching valve and mechanical failure of hydraulic insurance in the fault detection of aircraft wheel brake channel, the present invention proposes a fault detection method for aircraft wheel brake channel method

Method used

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  • Aviation airplane wheel brake channel fault detection method
  • Aviation airplane wheel brake channel fault detection method
  • Aviation airplane wheel brake channel fault detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0076] The aviation wheel brake channel is composed of a brake control unit, a brake control valve, a cut-off valve, a switching valve, a hydraulic insurance, a pressure sensor, and a brake circuit, such as figure 1 shown.

[0077] A method for fault detection of an aviation wheel brake channel, comprising the steps of:

[0078] Step 1, brake system self-test

[0079] The aircraft wheel brake system is in normal working condition, and the brake control unit performs self-test on the brake control valve, cut-off valve, pressure sensor and brake circuit of the brake channel.

[0080] When the self-test result shows abnormality, it is determined that the brake channel is in a fault state.

[0081] When the self-test results are normal, it means that the brake control valve, cut-off valve, pressure sensor and brake circuit are in normal working condition.

[0082] Step 2, collect the brake command signal value

[0083] The aircraft wheel braking system is in normal working con...

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PUM

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Abstract

The invention discloses an aviation airplane wheel brake channel fault detection method, and belongs to the technical field of aviation airplane wheel brake system fault diagnosis and detection. The aviation airplane wheel brake channel fault detection method comprises the steps of self-inspection of a brake system, acquisition of a brake instruction signal value, acquisition of a brake voltage signal value, acquisition of an airplane wheel speed signal value, calculation of airplane wheel slip amount, calculation of brake current, calculation of expected brake pressure, acquisition of actual output brake pressure and fault judgment of a brake channel. According to the fault detection method, abnormal output of a brake circuit, mechanical faults of a change-over valve, mechanical faults of hydraulic insurance and brake channel faults caused by mechanical clamping stagnation of a brake control valve in the braking process can be recognized.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis and detection of an aircraft wheel brake system, in particular to a fault detection method for an aircraft wheel brake channel. Background technique [0002] At present, there is a lack of fault detection methods for the brake channel. The commonly used method is to judge the faults of the brake control valve, cut-off valve, brake circuit, and pressure sensor respectively. When any of the above-mentioned system accessories fails, the brake channel is considered to be faulty. [0003] Brake control valve: By detecting whether the internal coil of the brake control valve is open or short circuited, the fault state of the brake control valve can be determined. [0004] Shut-off valve detection: determine the fault state of the shut-off valve by detecting whether the internal coil of the shut-off valve is open or short-circuited. [0005] Brake circuit detection: detection of the initial mome...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00G01L5/28G01R31/00B64F5/60G01D21/02
CPCG01M13/00G01L5/28G01R31/008B64F5/60G01D21/02Y02T90/00
Inventor 刘珂王红玲周宏博刘文亮闫丽张艺凡
Owner XIAN AVIATION BRAKE TECH
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