Application of multi-input volterra theory to nonlinear multi-degree-of-freedom aerodynamic systems

Maciej Balajewicz, Fred Nitzsche, Daniel Feszty

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents a reduced-order-modeling approach for nonlinear, multi-degree-of-freedom aerodynamic systems using multi-input Volterra theory. The method is applied to a two-dimensional, 2 degree-of-freedom transonic airfoil undergoing simultaneous forced pitch and heave harmonic oscillations. The so-called Volterra cross kernels are identified and shown to successfully model the aerodynamic nonlinearities associated with the simultaneous pitch and heave motions. The improvements in accuracy over previous approaches that effectively ignored the cross kernels by using superposition are demonstrated.

Original languageEnglish (US)
Pages (from-to)56-62
Number of pages7
JournalAIAA journal
Volume48
Issue number1
DOIs
StatePublished - Jan 2010
Externally publishedYes

ASJC Scopus subject areas

  • Aerospace Engineering

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