Abstract
Various representations of the aerodynamic contribution to the aircraft’s equations of motion are shown to be compatible within the common assumption of their Fréchet differentiability. Three forms of invalidating Fréchet differentiability are identified, and the mathematical model is amended to accommodate their occurrence. Some of the ways in which chaotic behavior may emerge are discussed, first at the level of the aerodynamic contribution to the equations of motion, and then at the level of the equations of motion themselves.
Analyse
Plusieurs représentations de la contribution aéro-dynamique aux équations du mouvement d’un avion sont compatibles entre elles si elles possèdent la propriété d’être différentiables selon Fréchet. Trois conditions de perte de cette propriété sont identifiées et le modèle mathématique est adapté à l’éventualité de leur occurrence. Certaines conditions d’apparition du comportement chaotique sont discutees, d’abord dans la représentation de la contribution aérodynamique aux équations du mouvement, puis dans les équations du mouvement elles-mêmes.
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Tobak, M., Chapman, G.T. & Ünal, A. Modeling aerodynamic discontinuities and onset of chaos in flight dynamical systems. Ann. Telecommun. 42, 300–314 (1987). https://doi.org/10.1007/BF02995248
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DOI: https://doi.org/10.1007/BF02995248
Key words
- Aerodynamics
- Chaos
- Mathematical model
- Dynamic system
- Airplane
- Nonlinear system
- Fluid dynamics
- Bifurcation theory