Reduced-Order Aeroelastic Models for the Dynamics of Manoeuvring Flexible Aircraft

Hesse, H. and Palacios, R. (2013) Reduced-Order Aeroelastic Models for the Dynamics of Manoeuvring Flexible Aircraft. In: International Forum of Aeroelasticity and Structural Dynamics (IFASD 2013), Bristol, UK, 24-26 June 2013, pp. 772-796. ISBN 9781634391023

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Abstract

We investigate model reduction, using balancing methods, of the unsteady aerodynamics of flexible aircraft subject to asymmetric gust excitations. The aeroelastic response of the vehicle, with possibly large wing deformations at trim, is captured by coupling a geometrically-exact beam formulation with the three-dimensional unsteady vortex lattice method. Consistent linearisation of the structural degrees of freedom allows the projection on a few vibration modes of the unconstrained aircraft and permits the vehicle flight dynamics to have arbitrarily-large angular velocities. The linearised aerodynamic system, which defines the mapping between the small number of generalised coordinates and the aerodynamic loads, is then reduced through balanced truncation. Numerical studies on a representative high-altitude, long-endurance aircraft demonstrate the reduced-order modelling approach for spanwise non-uniform discrete gusts over a range of gust lengths and lateral placement.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hesse, Dr Henrik
Authors: Hesse, H., and Palacios, R.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
ISBN:9781634391023

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