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Method for testing service life of turning control system of airplane

A control system, aircraft technology, applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc., can solve problems such as reducing the life of the landing gear and damage to the landing gear.

Active Publication Date: 2014-08-13
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Platform take-off and landing seriously damages the landing gear of the aircraft, greatly reducing the life of the landing gear

Method used

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  • Method for testing service life of turning control system of airplane
  • Method for testing service life of turning control system of airplane
  • Method for testing service life of turning control system of airplane

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Experimental program
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Embodiment Construction

[0039] Assume that a certain type of aircraft is completely land-based, and the life of the landing gear is 3000 take-offs and landings. The damage ratio for platform use versus land-based use is 2. The ratio of land landings to platform landings is 2. The land-based uses one takeoff and landing with 16 maneuvering turns and 4 traction turns; the platform uses one takeoff and landing with 16 maneuvering turns and 2 traction turns.

[0040] From the above conditions it can be determined that:

[0041] First, calculate the damage ratio

[0042] ζ = Σ 1 n i . jz Σ 1 n i . lj ...

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Abstract

The invention belongs to the field of undercarriage fatigue life tests and relates to a method for testing the service life of a turning control system of an airplane. The method is characterized in that firstly, the damage ratio of platform take-off and landing to land-based take-off and landing is determined; secondly, the ratio of platform take-off and landing to land-based take-off and landing is determined; thirdly, the frequency of land-based take-off and landing and the frequency of platform take-off and landing are calculated; fourthly, the frequency of turning in the process of land-based take-off and landing and the frequency of turning in the process of platform take-off and landing are counted; fifthly, the reliability coefficient of a test is calculated; sixth, the cycle number of the test is calculated. The method has the advantages that the use conditions of land-based take-off and landing and platform take-off and landing are considered, the design of the test better accords with real use conditions, and a test result is more accurate.

Description

technical field [0001] The invention belongs to the field of fatigue life test of landing gear, and relates to a life test method of a turning control system of landing gear of an aircraft using multiple platforms. Background technique [0002] The use of aircraft on land and platforms is different. Platform take-off and landing significantly damages the landing gear of the aircraft, greatly reducing the life of the landing gear. At the same time, in order to meet the requirements of platform use, the landing gear turning control system is also different from that of land-based aircraft, which can provide a larger turning angle. How to determine the service life of the turning control system according to the use of multiple platforms has become an important issue in the strength design of landing gear. [0003] The life analysis and test technology of land-based aircraft landing gear steering control system are relatively mature, but they cannot solve two key problems in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00G01M99/00
Inventor 杜金柱姚念奎曹莹卢学峰
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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