Aeroservoelastic Modeling and Analysis of a Highly Flexible Flutter Demonstrator

In this paper, the aeroservoelastic modeling of a highly fexible futter demonstrator is presented. A finite element model of the demonstrator is generated and condensed to a reduced number of degrees of freedom to represent the structural dynamics. The unsteady aerodynamics are captured by the doublet lattice method based on potential theory. By interconnection of structural dynamics and unsteady aerodynamics an aeroelastic model is derived, which provides a basis for the design of a futter suppression controller. In order to enable an efficient futter suppression a clear separation of the occurring futter mech-anisms in speed and frequency is desired. To achieve this, the positions of the actuators controlling the faps are varied within the scope of the aircraft design process. Due to their large mass contribution, the placement of the actuators has a crucial impact on the overall futter characteristics and optimal actuator positions are determined by means of a mass sensitivity study.     «

In this paper, the aeroservoelastic modeling of a highly fexible futter demonstrator is presented. A finite element model of the demonstrator is generated and condensed to a reduced number of degrees of freedom to represent the structural dynamics. The unsteady aerodynamics are captured by the doublet lattice method based on potential theory. By interconnection of structural dynamics and unsteady aerodynamics an aeroelastic model is derived, which provides a basis for the design of a futter su...     »