Inherent Stability Modes of Low-Aspect-Ratio Wings

The development of micro aerial vehicles has been hindered by a poor understanding of the flight dynamics associated with the unique aerodynamic regime. This study experimentally estimates the aerodynamic damping derivatives of flat-plate wings with aspect ratios less than 3 at a Reynolds number of 7.5×104; when combined with previously published results detailing the lateral and longitudinal static loads, a dynamic model is developed for low-aspect-ratio wings. The initial-condition response of the linear equations of motion shows that the loading created by roll stall results in purely aerodynamic lateral modes which, unlike conventional aircraft, are not attributed to geometric features, such as the vertical tail; this response was favorably compared with the integration of the full nonlinear equations. The mode is manifested by divergent, high-amplitude perturbations in sideslip, bank angle, and roll rate; furthermore, it is seen to be affected by angle of attack variations, which significantly alter ...

[1]  Charles H Zimmerman.  An analysis of longitudinal stability in power-off flight with charts for use in design , 1936 .

[2]  Joseph A Shortal,et al.  Effect of tip shape and dihedral on lateral-stability characteristics , 1937 .

[3]  W. H. Phillips,et al.  Effect of steady rolling on longitudinal and directional stability , 1948 .

[4]  W. Jones.  Wind-tunnel interference effects on measurements of aerodynamic coefficients for oscillating aerofoils , 1950 .

[5]  L. R. Fisher,et al.  Some Effects of Frequency on the Contribution of a Vertical Tail to the Free Aerodynamic Damping of a Model Oscillating in Yaw , 1952 .

[6]  W. D. Wolhart,et al.  Some Effects of Amplitude and Frequency on the Aerodynamic Damping of a Model Oscillating Continuously in Yaw , 1952 .

[7]  Albert L. Braslow,et al.  A RIGIDLY FORCED OSCILLATION SYSTEM FOR MEASURING DYNAMIC-STABILITY PARAMETERS IN TRANSONIC AND SUPERSONIC WIND TUNNELS , 1962 .

[8]  C J Schueler,et al.  TECHNIQUES FOR MEASUREMENT OF DYNAMIC STABILITY DERIVATIVES IN GROUND TEST FACILITIES , 1967 .

[9]  T. Mueller,et al.  Laminar Separation, Transition, and Turbulent Reattachment near the Leading Edge of Airfoils , 1980 .

[10]  Robert Gilmore,et al.  Catastrophe Theory for Scientists and Engineers , 1981 .

[11]  Raman K. Mehra,et al.  Bifurcation Analysis of Nonlinear Aircraft Dynamics , 1982 .

[12]  M. Dickinson,et al.  UNSTEADY AERODYNAMIC PERFORMANCE OF MODEL WINGS AT LOW REYNOLDS NUMBERS , 1993 .

[13]  Richard Hundley,et al.  Future Technology-Driven Revolutions in Military Operations , 1994 .

[14]  M. Selig.  Summary of low speed airfoil data , 1995 .

[15]  P. G. Thomasson.  The flight dynamics of a gust insensitive unmanned aircraft , 1995 .

[16]  Adrian L. R. Thomas,et al.  Leading-edge vortices in insect flight , 1996, Nature.

[17]  Louis V. Schmidt,et al.  Introduction to Aircraft Flight Dynamics , 1998 .

[18]  Joseph Katz,et al.  Wing/vortex interactions and wing rock , 1999 .

[19]  W. F. Phillips,et al.  Improved Closed-Form Approximation for Dutch Roll , 2000 .

[20]  J. Gordon Leishman,et al.  Principles of Helicopter Aerodynamics , 2000 .

[21]  Thomas J. Mueller,et al.  Low Reynolds Number Aerodynamics of Low-Aspect-Ratio, Thin/Flat/Cambered-Plate Wings , 2000 .

[22]  Matthew T. Keennon,et al.  Development of the Black Widow Micro Air Vehicle , 2001 .

[23]  Robert C. Nelson,et al.  The unsteady aerodynamics of slender wings and aircraft undergoing large amplitude maneuvers , 2003 .

[24]  Warren F. Phillips,et al.  Mechanics of Flight , 2004 .

[25]  Tang Jian,et al.  Numerical and experimental study of flow structure of low-aspect-ratio wing , 2004 .

[26]  Thomas J. Mueller,et al.  Low-aspect-ratio wing aerodynamics at low Reynolds numbers , 2004 .

[27]  Miguel R. Visbal,et al.  Unsteady aerodynamics of nonslender delta wings , 2005 .

[28]  Dan D. Vicroy,et al.  Overview of Dynamic Test Techniques for Flight Dynamics Research at NASA LaRC (Invited) , 2006 .

[29]  Deborah M. Tomek,et al.  The Next Generation of High-Speed Dynamic Stability Wind Tunnel Testing (Invited) , 2006 .

[30]  Mujahid Abdulrahim,et al.  Investigation of Membrane Actuation for Roll Control of a Micro Air Vehicle , 2007 .

[31]  Dale A. Lawrence,et al.  Autonomous Gust Insensitive Aircraft 1 , 2008 .

[32]  Robert J. Wood,et al.  The First Takeoff of a Biologically Inspired At-Scale Robotic Insect , 2008, IEEE Transactions on Robotics.

[33]  Peter Ifju,et al.  Wind-Tunnel Testing and Modeling of a Micro Air Vehicle with Flexible Wings , 2008 .

[34]  T. Colonius,et al.  Three-dimensional flows around low-aspect-ratio flat-plate wings at low Reynolds numbers , 2009, Journal of Fluid Mechanics.

[35]  Ismet Gursul,et al.  Low Reynolds number aerodynamics of free-to-roll low aspect ratio wings , 2010 .

[36]  Kamran Mohseni,et al.  Flow visualization and wall shear stress of a flapping model hummingbird wing , 2010 .

[37]  G. Spedding,et al.  Span Efficiencies of Wings at Low Reynolds Numbers , 2010 .

[38]  Ülgen Gülçat,et al.  Fundamentals of Modern Unsteady Aerodynamics , 2010 .

[39]  G C H E de Croon,et al.  Design, aerodynamics and autonomy of the DelFly , 2012, Bioinspiration & biomimetics.

[40]  Gregg Abate,et al.  Experimental Estimation of the Rotary Damping Coefficients of a Pliant Wing , 2012 .

[41]  Kamran Mohseni,et al.  Effects of Sideslip on the Aerodynamics of Low-Aspect-Ratio Low-Reynolds-Number Wings , 2012 .

[42]  Kamran Mohseni,et al.  Passive mitigation of roll stall for low aspect ratio wings , 2013, Adv. Robotics.

[43]  G. R. Spedding,et al.  Spanwise Variation in Circulation and Drag of Wings at Moderate Reynolds Number , 2013 .

[44]  M. Shields,et al.  Roll Stall for Low-Aspect-Ratio Wings , 2016 .

[45]  M. Shields,et al.  Aerodynamic damping derivatives of low aspect ratio wings at low Reynolds numbers , 2013 .

[46]  C. H. Zimmerman,et al.  AN ANALYSIS OF LATERA_L STABILITY IN POWER-OFF FLIGHT WiTH CHARTS FOR USE IN DESIGN , 2022 .