Representation and analysis of control surface freeplay nonlinearity

R. Vasconcellos, A. Abdelkefi, F. D. Marques, M. R. Hajj

Research output: Contribution to journalArticlepeer-review

84 Scopus citations

Abstract

Different representations for a control surface freeplay nonlinearity in a three degree of freedom aeroelastic system are assessed. These are the discontinuous, polynomial and hyperbolic tangent representations. The Duhamel formulation is used to model the aerodynamic loads. Assessment of the validity of these representations is performed through comparison with previous experimental observations. The results show that the instability and nonlinear response characteristics are accurately predicted when using the discontinuous and hyperbolic tangent representations. On the other hand, the polynomial representation fails to predict chaotic motions observed in the experiments.

Original languageEnglish
Pages (from-to)79-91
Number of pages13
JournalJournal of Fluids and Structures
Volume31
DOIs
StatePublished - May 2012

Keywords

  • Aeroelasticity
  • Control surface
  • Duhamel formulation
  • Experimental identification
  • Freeplay nonlinearity
  • Poincaré section

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