Effects of Fluid Compressibility on Landing Gear Shimmy

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Effects of Fluid Compressibility on Landing Gear Shimmy
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Affiliation:Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle,Nanjing University of Aeronautics and Astronautics,Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle,Nanjing University of Aeronautics and Astronautics,Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle,Nanjing University of Aeronautics and Astronautics,Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle,Nanjing University of Aeronautics and Astronautics
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Abstract:

Researching on the nose landing gear of a certain pilotless aircraft,On the basis of the establishment of the hydraulic cylinder pressure differential equations,shimmy damper hydraulic model has been build. ThroughStheSsimulationSanalysisSofShydraulicSmodels,StheSareaSofSpowerSdiagramSdecreasesSbyS44%SwhenStheSoilSgasScontentSincreasesSfromS0.05%StoS0.5%.STheSco-simulationSofSkineticSmodelSandShydraulicSmodel,SbasedSonSLMSSVirtual.LabSMotionSandSAMESimSrespectively,ScompareStheSdynamicSresponsesSofSaircraftSyawSangleSinSdifferentSoilScompressibility. WithSdifferentSworkingSconditionsSofStheSshimmySflightStestSsimulation,StheSresultsSshowSthatStheSshimmySstabilitySisSverySsensitiveStoStheSoilSliquidScompressibility.SOilSgasScontentSwhichSisSnotSsoSlargeS(greaterSthanS0.12%),SisSenoughStoScauseSshimmySinstability.

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DU Jin, WEI Xiao-hui, CAI Jia-qi, Wang Yong-quan. Effects of Fluid Compressibility on Landing Gear Shimmy[J]. Advances in Aeronautical Science and Engineering,2015,6(2):171-176

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Received:December 01,2014
Revised:December 22,2014
Adopted:December 25,2014
Online: June 21,2016
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