Shimmy Simulation and Virtual Verification for Civil Aircraft Landing Gear Airworthiness Certification

He, Xufei

doi:10.3901/jme.2018.14.179

Cited by 2 publications

(3 citation statements)

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“…The last moment term is the contribution of the tire force to the lateral bending of the strut. This is M𝞴𝞭 the moment due to the lateral deformation of the tire given by: 𝑀 = 𝑙 𝐹 cos(θ) cos(ϕ) (16) where lg is the distance between the attachment point of the gear to the fuselage, and the ground.…”

Section: Lateral Motionmentioning

confidence: 99%

“…More recent experiments typically use computer software such as the software package AUTO for their simulations [4,12,13,14,15]. Others use multi-body dynamic simulation software such as MATLAB SimScape [2,16], or other software that simulates 3D model interactions [1,17]. These simulations are limited by inaccuracies in their underlying models, or limitations in computational power if using numerical methods.…”

Section: Existing Shimmy Testingmentioning

confidence: 99%

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Artificial Runway Design for Shimmy Testing on Nose Landing Gear

Kim

2023

Preprint

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<p>This report proposes a novel design for general experimentation of shimmy on the nose landing gear of aircraft. Shimmy is known to cause excessive wear on the landing gear, discomfort to occupants, and potential safety hazards. A wide body of research exists for analytical models and computer simulations of shimmy. However, these models require physical testing to challenge underlying assumptions, particularly with regards to tire dynamics. Current experimentation methods, such as flight testing or small-scale setups, are either prohibitively expensive or inaccurate. The proposed design creates an artificial runway that would simulate real world conditions for aircraft, including accurate take-off speeds, weights, and ground interactions. This creates an environment for directly measuring shimmy, as well as other related quantities such as tire slip angle and deformation. This allows for a wide range of experiments to be conducted for model and design verification.</p>

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Section: Lateral Motionmentioning

confidence: 99%

Section: Existing Shimmy Testingmentioning

confidence: 99%

Artificial Runway Design for Shimmy Testing on Nose Landing Gear

Kim

2023

Preprint

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“…The issue of aircraft flight safety has attracted widespread attention from all walks of life. Among them, in flight safety, the two most noteworthy phases in each flight phase are the take-off and landing phases 1 . The landing gearshimmy occurs when the plane takes off or taxis for landing.Shimmy is a very complex self-excited vibration caused by the coupling of the lateral vibration of the landing gear strut and the front wheel and the torsional vibration of the front wheel around the axis of the strut.…”

Section: Introductionmentioning

confidence: 99%

Research on landing gearshimmy test flight technology based on data warehouse

Liu

2023

Third International Conference on Electronics, Electrical and Information Engineering (ICEEIE 2023)

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Guided by the technical idea of modern data warehouse (ODS), focusing on the characteristics of unstructured big data of flight test data, facing the requirements of model engineering for unified management and efficient processing of flight test data, and aiming at the granular comprehensive management of flight test big data, it provides a basis for the establishment of on-line management and analysis system of flight test big data based on ODS, It meets the requirements of model engineering for efficient analysis of flight test data. In order to test the stability of the landing gear system, the landing gearshimmy test was carried out on a real airplane for the first time in China. By installing an excitation board on the runway, the relevant modes of landing gearshimmy were effectively stimulated. The modal single peak isolation combined with the least square algorithm is used to analyze the experimental data through modal parameter identification. The results show that there is no shimmy in landing gear in flight test, and landing gear is stable in this test.

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Shimmy Simulation and Virtual Verification for Civil Aircraft Landing Gear Airworthiness Certification

Cited by 2 publications

References 0 publications

Artificial Runway Design for Shimmy Testing on Nose Landing Gear

Artificial Runway Design for Shimmy Testing on Nose Landing Gear

Research on landing gearshimmy test flight technology based on data warehouse

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