Analyse des systemes aeroservoelastiques boucles en configuration de retroaction: Application aux phenomenes de battement (French text).

摘要

The first goal of this document is to present and clarify the fundamental basis of aeroservoelasticity theory, and more specifically to emphasize how aeroelasticity and flight dynamics theories merge together to form aeroservoelasticity. The link between aeroelasticity and flight dynamics is rarely described in literature, and the same goes for aeroservoelasticity foundations from a theoretical point of view. That is why it is proposed in this document an approach to link all those theories together.; A method to analyse closed-loop aeroservoelastic dynamics is developed next. This method is inspired from the P method, which characterizes aeroelastic dynamics, and incorporates all the components of an aeroservoelastic system, such as flexible structure, aerodynamics, actuation and control system.; Furthermore, a linearisation approach is proposed to approximate unsteady aerodynamic forces as rational functions of the Laplace variable in the equations of motion.; Finally, in order to illustrate and validate all these concepts, the ATM aircraft model is studied in this document. This model was developed by NASA, using STARS computer software. It contains all the components essential to aeroservoelastic analysis, as well as some aeroservoelastic results obtained by NASA. (Abstract shortened by UMI.)