PG-EAM - Graduate Program in Aeronautical and Mechanical Engineering
PT EN
Master's Dissertation 2001

Aeroelastic analysis including servomechanism transfer functions.

Author

Marcelo Nogueira

Advisor

  • Advisor Maher Nasr Bismarck-Nasr

Concentration Area

Mecânica dos Sólidos e Estruturas

Defense Date

2001

Thesis Number

000463820

Abstract

This study presents an aeroelastic analysis including the servomechanism transfer functions. The aeroelastic (flutter) behavior of the dynamic structure is analyzed when a feedback control is introduced. A structural dynamic model is elaborated together with an aerodynamic model in order to obtain the aeroelastic model. A feedback control model was then implemented in the aeroelastic model to obtain the servomechanism model that is the focus of the analysis. A parametric study was made to analyze the behavior of the aeroelastic model with the feedback control. This parametric study consists in the variation of the parameters (gains of the transfer functions), which compound the feedback control model, and for each variation, a stability analysis (flutter analysis) was made and the results were plotted in the "v-g-f" graphs for obtaining the stability boundaries. From these graphs the stability tendencies with the introduction of the control system in the analysis could be determined.

Keywords

Aeroelasticidade Análise estrutural dinâmica Estrutura de aeronaves Servomecanismos Controle com realimentação Funções de transferência Vibração aeroelástica Mecânica dos sólidos Aerodinâmica Engenharia eletrônica Engenharia mecânica