Stiffness Characterization of an Inflated Airbag Based Three Axis Motion Platform

  • Eddy TrinkleinEmail author
  • Jason Blough
  • Gordon Parker
  • Jacob Thill
  • Michael Plackett
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)


An actively controlled airbag system used as a three axis motion platform is characterized by a unique application of the multiple input H1 Frequency Response Function (FRF) estimator. The goal of the testing is to understand the lateral (in-plane) stiffness properties of the inflated airbag at different inflation pressures and heights. The characterization is required to explore the controllability of the platform. The dynamic lateral magnitude increased 11.3 %, from 0.62 to 0.69 G/N, on average while damping decreased by 11.5 %, from 0.164 to 0.147, as height increased. Furthermore, the natural frequency shifted from 8.6 to 4.2 Hz as pressure and height varied. The static lateral stiffness increased on average 3.4 fold, from 6.5 to 22.2 N/cm from the lowest to highest pressure.


Airbag Motion Platform Stiffness Estimation 


  1. 1.
    Stewart, D.: A platform with six degrees of freedom. Proc. Inst. Mech. Eng. 180(5), 371–386 (1965/1966)Google Scholar
  2. 2.
    Crewe, P., Eggington, W.: The hovercraft - a new concept in maritime transport. Trans. R. Inst. Nav. Archit. 102, 315–356 (1960)Google Scholar
  3. 3.
    Sørensen, A., Egeland, O.: Design of ride control system for surface effect ships using dissipative control. Automatica 31(2), 183–199 (1995)MathSciNetCrossRefzbMATHGoogle Scholar
  4. 4.
    Hinchey, M., Sullivan, P., Dupuis, A.: On the heave dynamics of large air cushion platforms. J. Sound Vib. 96(4), 469–484 (1984)CrossRefzbMATHGoogle Scholar
  5. 5.
    Blough, J.R., DeClerck, J.P.: Application and development of some signal processing procedures to estimate frequency response functions of a system during operation. In: Proceedings of the 15th International Seminar of Modal Analysis Conference (1996)Google Scholar
  6. 6.
    Bendat, J.S., Piersol, A.G.: Random Data. Analysis and Measurement Procedures. Wiley, New York (2000)zbMATHGoogle Scholar

Copyright information

© The Society of Experimental Mechanics, Inc. 2016

Authors and Affiliations

  • Eddy Trinklein
    • 1
    Email author
  • Jason Blough
    • 1
  • Gordon Parker
    • 1
  • Jacob Thill
    • 1
  • Michael Plackett
    • 2
  1. 1.Michigan Technological UniversityHoughtonUSA
  2. 2.Quantum Engineering Design, Inc.CorvallisUSA

Personalised recommendations