Inertial attitude control of a bat-like morphing-wing air vehicle.

This paper presents a novel bat-like unmanned aerial vehicle inspired by the morphing-wing mechanism of bats. The goal of this paper is twofold. Firstly, a modelling framework is introduced for analysing how the robot should manoeuvre by means of changing wing morphology. This allows the definition of requirements for achieving forward and turning flight according to the kinematics of the wing modulation. Secondly, an attitude controller named backstepping+DAF is proposed. Motivated by biological evidence about the influence of wing inertia on the production of body accelerations, the attitude control law incorporates wing inertia information to produce desired roll (ϕ) and pitch (θ) acceleration commands (desired angular acceleration function (DAF)). This novel control approach is aimed at incrementing net body forces (F(net)) that generate propulsion. Simulations and wind-tunnel experimental results have shown an increase of about 23% in net body force production during the wingbeat cycle when the wings are modulated using the DAF as a part of the backstepping control law. Results also confirm accurate attitude tracking in spite of high external disturbances generated by aerodynamic loads at airspeeds up to 5 ms⁻¹.

[1]  Ulla M. Norberg,et al.  Moments of Inertia of Bat Wings and Body , 1991 .

[2]  Sharon M Swartz,et al.  Whole-body kinematics of a fruit bat reveal the influence of wing inertia on body accelerations , 2011, Journal of Experimental Biology.

[3]  Nguyen Trong Tai,et al.  Adaptive proportional?integral?derivative tuning sliding mode control for a shape memory alloy actuator , 2011 .

[4]  Daniel J. Inman,et al.  Macro-Fiber Composite Actuators for Flow Control of a Variable Camber Airfoil , 2011 .

[5]  David Lentink,et al.  How swifts control their glide performance with morphing wings , 2007 .

[6]  John Yen,et al.  Design and Implementation of a Shape Memory Alloy Actuated Reconfigurable Airfoil , 2003 .

[7]  Ruxandra Botez,et al.  Closed-loop control validation of a morphing wing using wind tunnel tests , 2010 .

[8]  David Lentink,et al.  Nature-inspired flight—beyond the leap , 2010, Bioinspiration & biomimetics.

[9]  Roy Featherstone,et al.  Rigid Body Dynamics Algorithms , 2007 .

[10]  Jian Chen,et al.  Quantifying the complexity of bat wing kinematics. , 2008, Journal of theoretical biology.

[11]  K. Breuer,et al.  The effect of body size on the wing movements of pteropodid bats, with insights into thrust and lift production , 2010, Journal of Experimental Biology.

[12]  Mustapha Ouladsine,et al.  Longitudinal modelling and control of a flapping-wing micro aerial vehicle , 2010 .

[13]  J Colorado,et al.  Corrigendum: Biomechanics of smart wings in a bat robot: morphing wings using SMA actuators , 2012, Bioinspiration & biomimetics.

[14]  Roy Featherstone,et al.  An Architecture for Fast and Accurate Control of Shape Memory Alloy Actuators , 2008, Int. J. Robotics Res..

[15]  Ephrahim Garcia,et al.  Optimization of Perching Maneuvers Through Vehicle Morphing , 2008 .

[16]  K. Breuer,et al.  Direct measurements of the kinematics and dynamics of bat flight , 2006, Bioinspiration & biomimetics.

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

[18]  S. Swartz,et al.  A computational model for estimating the mechanics of horizontal flapping flight in bats: model description and validation. , 2001, The Journal of experimental biology.

[19]  Ephrahim Garcia,et al.  Morphing unmanned aerial vehicles , 2011 .

[20]  Samir Bouabdallah,et al.  Design and control of quadrotors with application to autonomous flying , 2007 .

[21]  Sharon M Swartz,et al.  Kinematics of slow turn maneuvering in the fruit bat Cynopterus brachyotis , 2008, Journal of Experimental Biology.

[22]  Wei Xian,et al.  Bat wing sensors support flight control , 2011, Proceedings of the National Academy of Sciences.

[23]  A. Hedenström,et al.  Bird or bat: comparing airframe design and flight performance , 2009, Bioinspiration & biomimetics.

[24]  Ola Härkegård,et al.  Flight Control Design using Backstepping , 2001 .

[25]  J. Denavit,et al.  A kinematic notation for lower pair mechanisms based on matrices , 1955 .

[26]  Michael W. Oppenheimer,et al.  Wingbeat Shape Modulation for Flapping-Wing Micro-Air-Vehicle Control During Hover (Postprint) , 2010 .

[27]  Rick Lind,et al.  Time-varying dynamics of a micro air vehicle with variable-sweep morphing , 2009 .

[28]  Gangbing Song,et al.  Position control of shape memory alloy actuators with internal electrical resistance feedback using neural networks , 2004 .

[29]  Antonio Barrientos,et al.  Mini-quadrotor attitude control based on Hybrid Backstepping & Frenet-Serret theory , 2010, 2010 IEEE International Conference on Robotics and Automation.

[30]  Ron Barrett,et al.  Morphing wing flight control via postbuckled precompressed piezoelectric actuators , 2007 .

[31]  William R. Walsh,et al.  Mechanical properties of bat wing membrane skin , 1996 .

[32]  Kevin A. Snook,et al.  縦方向電界場中で曲げたPIN-PMN-PT単結晶の強度 , 2011 .