Design and characterization of a multi-articulated robotic bat wing

There are many challenges to measuring power input and force output from a flapping vertebrate. Animals can vary a multitude of kinematic parameters simultaneously, and methods for measuring power and force are either not possible in a flying vertebrate or are very time and equipment intensive. To circumvent these challenges, we constructed a robotic, multi-articulated bat wing that allows us to measure power input and force output simultaneously, across a range of kinematic parameters. The robot is modeled after the lesser dog-faced fruit bat, Cynopterus brachyotis, and contains seven joints powered by three servo motors. Collectively, this joint and motor arrangement allows the robot to vary wingbeat frequency, wingbeat amplitude, stroke plane, downstroke ratio, and wing folding. We describe the design, construction, programing, instrumentation, characterization, and analysis of the robot. We show that the kinematics, inputs, and outputs demonstrate good repeatability both within and among trials. Finally, we describe lessons about the structure of living bats learned from trying to mimic their flight in a robotic wing.

[1]  M. Dickinson,et al.  The control of flight force by a flapping wing: lift and drag production. , 2001, The Journal of experimental biology.

[2]  Pao Tai Lin,et al.  Mid-infrared materials and devices on a Si platform for optical sensing , 2014, Science and technology of advanced materials.

[3]  Sharon M Swartz,et al.  Changes in kinematics and aerodynamics over a range of speeds in Tadarida brasiliensis, the Brazilian free-tailed bat , 2012, Journal of The Royal Society Interface.

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

[5]  K. Breuer,et al.  Time-resolved wake structure and kinematics of bat flight , 2009 .

[6]  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.

[7]  Tyson L Hedrick,et al.  Software techniques for two- and three-dimensional kinematic measurements of biological and biomimetic systems , 2008, Bioinspiration & biomimetics.

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

[9]  A Hedenström,et al.  Time-resolved vortex wake of a common swift flying over a range of flight speeds , 2011, Journal of The Royal Society Interface.

[10]  T. Roberts,et al.  Variable gearing in pennate muscles , 2008, Proceedings of the National Academy of Sciences.

[11]  H. M. Karara,et al.  Direct Linear Transformation from Comparator Coordinates into Object Space Coordinates in Close-Range Photogrammetry , 2015 .

[12]  M. Dickinson,et al.  Wing rotation and the aerodynamic basis of insect flight. , 1999, Science.

[13]  Sharon M Swartz,et al.  Climbing flight performance and load carrying in lesser dog-faced fruit bats (Cynopterus brachyotis) , 2011, Journal of Experimental Biology.

[14]  York Winter,et al.  Actuator disk model and span efficiency of flapping flight in bats based on time-resolved PIV measurements , 2011 .

[15]  Berg,et al.  The moment of inertia of bird wings and the inertial power requirement for flapping flight , 1995, The Journal of experimental biology.

[16]  T. Kunz,et al.  The cost of hovering and forward flight in a nectar-feeding bat, Glossophaga soricina, estimated from aerodynamic theory. , 1993, The Journal of experimental biology.

[17]  A. Hedenström,et al.  Bat Flight Generates Complex Aerodynamic Tracks , 2007, Science.

[18]  Thomas J Roberts,et al.  Adjusting muscle function to demand: joint work during acceleration in wild turkeys , 2004, Journal of Experimental Biology.

[19]  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.

[20]  K. Breuer,et al.  Upstroke wing flexion and the inertial cost of bat flight , 2012, Proceedings of the Royal Society B: Biological Sciences.

[21]  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.

[22]  G. E. Goslow,et al.  The functional anatomy of the shoulder in the European starling (Sturnus vulgaris) , 1991, Journal of morphology.

[23]  J. Scott Altenbach,et al.  The Functional Anatomy of the Shoulder of the Pallid Bat, Antrozous pallidus , 1983 .

[24]  Kenneth Breuer,et al.  Aeromechanics of Membrane Wings with Implications for Animal Flight ArnoldSong, ∗ XiaodongTian, † EmilyIsraeli, ‡ RicardoGalvao, § KristinBishop, ¶ SharonSwartz, ∗∗ , 2008 .

[25]  A. Biewener,et al.  PECTORALIS MUSCLE FORCE AND POWER OUTPUT DURING DIFFERENT MODES OF FLIGHT IN PIGEONS (COLUMBA LIVIA) , 1993 .

[26]  Cameron Tropea,et al.  Experimental investigation of a flapping wing model , 2009 .

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

[28]  Joseph W Bahlman,et al.  Bats go head-under-heels: the biomechanics of landing on a ceiling , 2009, Journal of Experimental Biology.

[29]  Holbrook Ka,et al.  A Collagen and Elastic Network in the Wing of the Bat , 1978 .

[30]  K. Breuer,et al.  Wake structure and wing kinematics: the flight of the lesser dog-faced fruit bat, Cynopterus brachyotis , 2010, Journal of Experimental Biology.

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

[32]  T. Weis-Fogh,et al.  Biology and physics of locust flight. I. Basic principles in insect flight. A critical review , 1956, Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences.

[33]  Bernard Dieny,et al.  The 2014 Magnetism Roadmap , 2014 .

[34]  Ulla M. Norberg,et al.  Functional osteology and myology of the wing of the dog-faced bat Rousettus aegyptiacus (É. Geoffroy) (Mammalia, Chiroptera) , 1972, Zeitschrift für Morphologie der Tiere.

[35]  Anders Hedenström,et al.  High-speed stereo DPIV measurement of wakes of two bat species flying freely in a wind tunnel , 2009 .

[36]  U. M. Norberg,et al.  Aerodynamics, kinematics, and energetics of horizontal flapping flight in the long-eared bat Plecotus auritus. , 1976, The Journal of experimental biology.

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

[38]  I. Hunter,et al.  The Development of a Biologically Inspired Propulsor for Unmanned Underwater Vehicles , 2007, IEEE Journal of Oceanic Engineering.

[39]  Gabriel Taubin,et al.  3D reconstruction of bat flight kinematics from sparse multiple views , 2011, 2011 IEEE International Conference on Computer Vision Workshops (ICCV Workshops).

[40]  J. Scott Altenbach,et al.  Functional anatomy of the shoulder and arm of the fruit‐eating bat Artibeus jamaicensis , 1985 .

[41]  A. Biewener,et al.  Mechanical power output of bird flight , 1997, Nature.

[42]  U. Norberg Vertebrate Flight: Mechanics, Physiology, Morphology, Ecology and Evolution , 1990 .

[43]  Sharon M. Swartz,et al.  Biomechanics of the Bat Limb Skeleton: Scaling, Material Properties and Mechanics , 2007, Cells Tissues Organs.

[44]  J. Rayner,et al.  Ecological Morphology and Flight in Bats (Mammalia; Chiroptera): Wing Adaptations, Flight Performance, Foraging Strategy and Echolocation , 1987 .

[45]  Melissa S. Bowlin,et al.  Vortex wake, downwash distribution, aerodynamic performance and wingbeat kinematics in slow-flying pied flycatchers , 2012, Journal of The Royal Society Interface.

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

[47]  A. Hedenström,et al.  Leading-Edge Vortex Improves Lift in Slow-Flying Bats , 2008, Science.

[48]  A. Biewener,et al.  Comparative power curves in bird flight , 2003, Nature.

[49]  A. Hedenström,et al.  Kinematics of flight and the relationship to the vortex wake of a Pallas' long tongued bat (Glossophaga soricina) , 2010, Journal of Experimental Biology.

[50]  Jonathan E. Clark,et al.  iSprawl: Design and Tuning for High-speed Autonomous Open-loop Running , 2006, Int. J. Robotics Res..

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

[52]  Anders Hedenström,et al.  Stroke plane angle controls leading edge vortex in a bat-inspired flapper , 2012 .

[53]  Michael H Dickinson,et al.  Collision-avoidance and landing responses are mediated by separate pathways in the fruit fly, Drosophila melanogaster. , 2002, The Journal of experimental biology.