A method for aircraft cable fault location based on aircraft cable distribution information database
A technology for distributing information and fault location, applied in the direction of fault location, etc., can solve problems such as time-consuming and affecting work efficiency
Active Publication Date: 2018-04-20
COMAC +1
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Problems solved by technology
If only a single cable can be fault located, then multiple connectors need to be disassembled according to the test procedures to locate the fault, which takes a lot of time and seriously affects work efficiency
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[0025] An aircraft cable fault location method based on the aircraft cable distribution information database of the present invention is described in detail with reference to the accompanying drawings.
[0026] figure 1It is the overall process of the aircraft cable fault location method based on the aircraft cable distribution information database of the present invention, including: classifying the cable types in the aircraft cable network database, and selecting a sample cable for each type, and determining Input the type and length of the cable, and calculate the reflection coefficient of each type of cable by calculating the ratio of the reflection sampling point to the cable length. Find the wire list in the WDM manual of Boeing 777 related models, select the wire harness number Bundle No., wire number Wire No., group number Farm, length FT-IN, and From Equip in the wire list, that is, from a device side, including Which pin or corresponding type from the equipment end,...
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The invention provides an airplane cable fault positioning method based on an airplane cable distribution information databank. With the combination of an airplane route manual and a waveform comparison algorithm, the airplane cable fault positioning method comprises the following steps: generating reflection coefficients of different types of cables according to airplane cable data in the airplane route manual; generating a cable network sub-databank including the cable constituting structures and branch situations of cables on the basis of WDM and a testing end for manual input; generating reflection waveforms of the cable network in a complete state according to the cable network sub-databank; acquiring the reflection waveforms of the cable network by using a waveform generator and a data acquisition card; comparing reflection waveforms of the tested cable network and the cable network in the complete state by using a waveform comparison algorithm, thereby achieving cable network fault diagnosis and positioning, and achieving fault type and fault position judgment on any position inside a two-branch four-connector cable network structure. Therefore, the fault diagnosis error is smaller than 0.02m, and the maximum measurement length is 200m.
Description
technical field [0001] The invention belongs to the field of fault diagnosis, in particular to an aircraft cable fault location method based on an aircraft cable distribution information database. Background technique [0002] Aircraft cable refers to the hardware device that provides power energy and transmits control signals for the electrical system on the aircraft. It is composed of connecting wires, connectors and many other devices. Energy and information channels play a vital role in flight control and flight safety. [0003] Aircraft cable failures may occur during aircraft manufacturing and assembly, making aircraft cable integrity testing an important task in the aircraft assembly process. In the process of aircraft manufacturing, after the installation of aircraft cables and before the installation of airborne equipment, it is necessary to use the test system to test all the cables of the aircraft to verify whether all aircraft cables are connected correctly and ...
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IPC IPC(8): G01R31/08
Inventor 翁远卓蔡云芳范玲陶利军詹健斌陈丽闫凤生石旭东
Owner COMAC