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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (6): 527063-527063.doi: 10.7527/S1000-6893.2022.27063

• Reviews • Previous Articles     Next Articles

Research progress on shimmy dynamics of aircraft landing gear systems

LIU Xiaochuan1,2,3, LIU Chongchong1,2,3, MOU Rangke1,2,3   

  1. 1. Aircraft Strength Research Institute of China, Xi'an 710065, China;
    2. Aviation Key Laboratory of Science and Technology on Structural Impact Dynamics, Xi'an 710065, China;
    3. Shaanxi Province Key Labortary of Aircraft Vibration, Impact and Noise, Xi'an 710065, China
  • Received:2022-02-23 Revised:2022-03-24 Online:2022-06-15 Published:2022-03-22
  • Supported by:
    National Level Project

Abstract: As a self-excited vibration generated by the mutual coupling of the lateral motion and the torsional motion of the landing gear strut,shimming does great harm to the maneuverability and safety of aircraft taxiing on the ground and becomes an important dynamic problem in the design of landing gear system. There are two types of shimmy,the tire-yaw shimmy and the structural-torsion shimmy. Currently,dynamic theoretical modeling, multi-body dynamics numerical analysis and full-scale physical test could be used to study the shimmy characteristics of landing gear system. Linear and nonlinear theoretical modeling methods and numerical tools have been developed, and landing gear shimmy test systems has been established, the sliding stability tests of the aircrafts under transient excitations were also carried out. To prevent the occurrence of shimmy problems, based on the understanding of the shimmy mechanism, the researchers have extensively and deeply studied the effects of landing gear design parameters, tire parameters and aircraft fuselage characteristics on the sliding response and stability. The dynamic optimization design methods and the shimmy suppression of intelligent devices, and semi-active/active control methods are developed;the test verifications or landing gear installation demonstration verifications are carried out. Drawing upon the future development of aircraft platform and the innovation of landing gear technology, the future development direction of landing gear shimmy dynamics is prospected.

Key words: aircraft taxing, landing gear, shimmy, shimmy damper, shimmy suspension

CLC Number: