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Design and Calibration of a Test Rig for Shimmy Damper Characterization

Shimmy dampers are used to attenuate the oscillatory motion encountered during ground operation of aircraft landing gear. This paper presents the development of a test rig for characterizing nose landing gear shimmy damper. This apparatus was designed to simulate ground operation of an aircraft nose landing gear. A roller drum is used to simulate landing and takeoff speeds, while an impact moment mechanism was used to induce shimmy, forcing shimmy vibration through tire slip. Weights can be used to induce vertical force which simulates the fuselage weight. Initial experimental results are presented to illustrate the operation and performance of the rig. Keywords-shimmy; damper; design; static stress;modal analysis