Fish-like locomotion using bio-inspired plates

Georgia Institute of Technology, USA

Date(s) : 27/05/2020   iCal
16 h 00 min - 17 h 00 min

We develop a fluid-structure interaction computational model based on the lattice Boltzmann method and the thin plate model to investigate the impact of different strategies for bio-inspired locomotion with an oscillating elastic plate. We first probe the effects of actuation patterns on the dynamic response of plates with different mechanical and geometrical properties. In particular, we consider the actuation using a distributed internal moment that represents the actuation of piezoelectric smart materials and compare the hydrodynamic performance of such plates with the hydrodynamics of a plunging elastic plate. We then examine the combined plate actuation that integrates plunging using an external actuator with internal piezoelectric actuation. We search for hydrodynamic regimes in which the synergy of two different actuation modes leads to improved thrust production and efficiency. Furthermore we probe how passive attachments to active plates, including attachments with tapered geometry, can be harnessed to enhance the thrust production and efficiency. Finally, we study how complex actuation patterns integrating external and internal actuations can be used for navigation and maneuvering of robotic swimmers.

Ersan Demirer, Georgia Institute of Technology, USA


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