Nonparametric Subspace Identification of Nonlinear Structures - Application to a Spacecraft

Jean-Philippe Noël, Gaetan Kerschen
2013 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference   unpublished
Chemin des chevreuils 1 (B52/3), 4000, Liège, Belgium The objective of the present paper is to address the identification of a strongly nonlinear satellite structure by exploiting a new nonlinear subspace identification method formulated in the frequency domain, referred to as the FNSI method. The modal parameters of the underlying linear structure and the coefficients of the nonlinear internal forces will be estimated by this approach. Moreover, because a priori knowledge about nonlinear
more » ... out nonlinear behaviour may be limited, the paper also proposes a nonparametric spline-based modelling strategy, encapsulated in the FNSI method. The application of interest is the SmallSat spacecraft developed by EADS-Astrium, which possesses an impact-type nonlinear device consisting of eight mechanical stops limiting the motion of an inertia wheel mounted on an elastomeric interface.
doi:10.2514/6.2013-1883 fatcat:mlkhfxkje5bx3kat5kbd7pfo4i