Quantitative aeroelastic stability evaluation of control surfaces with structural nonlinearities

Aykut Tamer, Pierangelo Masarati

Research output: Chapter or section in a book/report/conference proceedingChapter in a published conference proceeding

Abstract

This work discusses the quantitative stability evaluation of aeroelastic problems with nonlinearities in the control surfaces. Stability estimation of linear time invariant and linear time periodic systems rely on eigenanalysis of state transition matrices and implies simplifications on the problems governed by nonlinear non-autonomous equations. Lyapunov Characteristic Exponents directly provide quantitative information on the stability of nonlinear non-autonomous dynamical systems. Stability estimation using Lyapunov Characteristic Exponents does not require a special reference solution and is consistent with the eigensolution of linear time invariant and Floquet-Lyapunov analysis of linear time periodic systems. Thus, they represent a natural generalization of conventional stability analysis. The Discrete QR method is used to practically estimate the Lyapunov Characteristic Exponents. The method is applied to two- and three-dimensional aeroelastic problems with lumped nonlinearities in control surfaces.

Original languageEnglish
Title of host publication17th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2017
PublisherInternational Forum on Aeroelasticity and Structural Dynamics (IFASD)
ISBN (Electronic)9788897576280
Publication statusPublished - 28 Jun 2017
Event17th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2017 - Como, Italy
Duration: 25 Jun 201728 Jun 2017

Publication series

Name17th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2017
Volume2017-June

Conference

Conference17th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2017
Country/TerritoryItaly
CityComo
Period25/06/1728/06/17

Keywords

  • Control System Nonlinearities
  • Lyapunov Exponents
  • Stability

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanical Engineering

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