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The Performance Estimation of a Landing Gear With In-Service Variations

[+] Author Affiliations
Tae-Uk Kim, Jeong Woo Shin, In Hee Hwang

Korea Aerospace Research Institute, Daejeon, South Korea

Paper No. IMECE2007-41369, pp. 9-15; 7 pages
  • ASME 2007 International Mechanical Engineering Congress and Exposition
  • Volume 1: Advances in Aerospace Technology
  • Seattle, Washington, USA, November 11–15, 2007
  • Conference Sponsors: ASME
  • ISBN: 0-7918-4295-9 | eISBN: 0-7918-3812-9
  • Copyright © 2007 by ASME


The performance estimation of a landing gear with uncertain parameters is presented. In actual use, many parameters can have a certain amount of variations which affect the overall performance of impact energy absorption. For example, the shock strut gas pressure, oil volume, tire pressure and temperature can have deviations from their nominal values. The objective function in this research is the ground reaction during the aircraft’s touchdown which is a function of the above-mentioned parameters and time. To consider the uncertain properties, the convex modeling and interval analysis are used in calculating objective function. The numerical results show that the ground reaction characteristics are quite different from those of the deterministic method. The peak load, which affects the overall efficiency and the structural integrity, is considerably increased when the uncertainties considered. Therefore, it is important to consider the possible uncertainties and the proposed methodology can be an efficient way to estimate the effect of such uncertainty.

Copyright © 2007 by ASME
Topics: Gears



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