Bat Flight

Bat Flight

“Is your mama a llama?” I asked my friend Dave.

“No, she is not,” is the answer Dave gave.

“She hangs by her feet, and she lives in a cave. I do not believe that’s how llamas behave.”

“Oh,” I said. “You are right about that. I think that your mama sounds more like a…”

A very articulate animal

Kinematics of Flexible Membrane

Particle Image Velocimetry

Experiment Setup

Complex Wing Flapping

Eddy-one home? The Kelvin CirculationTheorem

a

Stokes Theorem: Why we measure vorticity

Relates path integral of velocity to vorticity

Get ready for lift-off

Wake Up!

Vorticity – one last look

Strouhal Number

Biomimic bat wing

Physics/EngineeringBiology/Physiology

Straight from the horse’s mouth

What features are being mimicked - or not?

The arm bones connects to the elbow.. (sing along now!)

Motors/actuation

Measuring lift and thrust

Going batty (?)

BAT FLIGHT AND KINEMATICS Tian, Xiaodong, et al. "Direct measurements of the kinematics and dynamics of bat

flight." Bioinspiration & Biomimetics 1.4 (2006): S10. Hubel, Tatjana Y., et al. "Wake structure and wing kinematics: the flight of the lesser

dog-faced fruit bat, Cynopterus brachyotis." The Journal of experimental biology 213.20 (2010): 3427-3440

Hardi P, “Why can airplanes fly?” http://www3.kis.uni-freiburg.de/~peter/teach/hydro/hydro05.pdf

BIOMIMIC BAT WING Bahlman, Joseph W., Sharon M. Swartz, and Kenneth S. Breuer. "Design and

characterization of a multi-articulated robotic bat wing." Bioinspiration & biomimetics 8.1 (2013): 016009.

References