Innovative Aircraft Aeroelastic Modelling and Control

The aeroelastic design of innovative aircraft wing configurations imposes the designer to deal with specific phenomena, which are not usually considered in classical aircraft definition. The design process itself, though, gives the designer several indications on how to maintain the safety standards imposed by regulations. The investigation of the basic aeroelastic principles for unconventional wings with high aspect ratios can be extremely interesting as, once introduced in a multidisciplinary design, they can be very effective in giving an early determination of the static and dynamic behaviour of the aircraft, leading to significant improvements in the configuration weight, cost, and overall performance. The paper shows some preliminary results as part of the main objectives of the In.A.Team group (Innovative Aircraft Theoretical-Experimental Aeroelastic Modelling) at Politecnico di Torino, Italy. The In.A.Team Project has the following main objectives: 1) to develop multidisciplinary analysis methods appropriate to unconventional aircrafts (highly flexible, "morphing" vehicles); 2) to develop the capability of illustrating and understanding the effects of uncertainties on the behaviour of an aeroelastic system; 3) to apply the innovative adaptive L1 control techniques to highly flexible wings, 4) to integrate theoretical analysis with commercial structural (FEM) and aerodynamic tools (CFD). 5) to design and manufacture an aeroelastic experimental-test-model. 6) to validate theoretical/numerical results by vibration and aeroelastic wind tunnel tests

[1]  Chengyu Cao,et al.  Design and Analysis of a Novel L1 Adaptive Controller, Part I: Control Signal and Asymptotic Stability , 2006, 2006 American Control Conference.

[2]  Earl H. Dowell,et al.  Nonlinear equations of motion for the elastic bending and torsion of twisted nonuniform rotor blades , 1974 .

[3]  Dewey H. Hodges,et al.  Flight Dynamics of Highly Flexible Flying Wings , 2006 .

[4]  K. L. Roger,et al.  Airplane Math Modeling Methods for Active Control Design , 1977 .

[5]  Enrico Cestino,et al.  Critical behaviour of slender wing configurations , 2010 .

[6]  Naira Hovakimyan,et al.  Design and Analysis of a Novel ${\cal L}_1$ Adaptive Control Architecture With Guaranteed Transient Performance , 2008, IEEE Transactions on Automatic Control.

[7]  Dewey H. Hodges,et al.  Theory of Anisotropic Thin-Walled Beams , 2000 .

[8]  M. R. Silva,et al.  Nonlinear Flexural-Flexural-Torsional Dynamics of Inextensional Beams. I. Equations of Motion , 1978 .

[9]  T. S. Beddoes A synthesis of unsteady aerodynamic effects including stall , 1975 .

[10]  S. J. Price,et al.  NONLINEAR AEROELASTIC ANALYSIS OF AIRFOILS : BIFURCATION AND CHAOS , 1999 .

[11]  Irene M. Gregory,et al.  Adaptive control laws for flexible semi-span wind tunnel model of high-aspect ratio flying wing , 2007 .

[12]  Giulio Romeo,et al.  Nonlinear Aeroelastic Modeling and Experiments of Flexible Wings , 2006 .

[13]  Jennifer Heeg,et al.  An analytical and experimental investigation of flutter suppression via piezoelectric actuation , 1992 .

[14]  Giulio Romeo,et al.  Non-linear Aeroelastic Behavior of Highly Flexible HALE Wings , 2006 .

[15]  A. Nayfeh,et al.  Linear and Nonlinear Structural Mechanics , 2002 .

[16]  Robert R. Bitmead,et al.  Transient bounds for adaptive control systems , 1994, IEEE Trans. Autom. Control..

[17]  Erian A. Armanios,et al.  Free Vibration Analysis of Anisotropic Thin-Walled Closed-Section Beams , 1994 .

[18]  Afzal Suleman,et al.  Aeroelastic Control of a Wing with Active Skins Using Piezoelectric Patches , 2007 .

[19]  Earl H. Dowell,et al.  COMMENTS ON THE ONERA STALL AERODYNAMIC MODEL AND ITS IMPACT ON AEROELASTIC STABILITY , 1996 .

[20]  Giulio Romeo,et al.  Stability and Control of a High-Altitude, Long-Endurance UAV , 2007 .

[21]  Enrico Cestino,et al.  Structural Uncertainty Effect on Classical Wing Flutter Characteristics , 2010 .

[22]  J. G. Leishman,et al.  A Semi-Empirical Model for Dynamic Stall , 1989 .

[23]  Enrico Cestino,et al.  Critical Aeroelastic Behaviour of Slender Composite Wings in an Incomprenssible Flow , 2010 .

[24]  Taehyoun Kim,et al.  Reduced-Order Aeroservoelastic Model with an Unsteady Aerodynamic Eigen Formulation , 1997 .

[25]  Carlos E. S. Cesnik,et al.  Nonlinear Aeroelastic Modeling and Analysis of Fully Flexible Aircraft , 2005 .