Sensing oscillations in unsteady flow for better robotic swimming efficiency

Authors Organisations
  • Jaas Ježcov(Author)
    Tallinn University of Technology
  • Otar Akanyeti(Author)
    University of Verona
  • Lily D. Chambers(Author)
    University of Bath
  • Maarja Kruusmaa(Author)
    Tallinn University of Technology
Type Conference Proceeding (Non-Journal item)
Original languageEnglish
Title of host publicationProceedings 2012 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2012
Pages91-96
Number of pages6
DOI
Publication statusPublished - 13 Dec 2012
Externally publishedYes
Event2012 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2012 - Seoul, Korea (Republic of)
Duration: 14 Oct 201217 Oct 2012

Publication series

NameConference Proceedings - IEEE International Conference on Systems, Man and Cybernetics
ISSN (Print)1062-922X

Conference

Conference2012 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2012
Country/TerritoryKorea (Republic of)
CitySeoul
Period14 Oct 201217 Oct 2012
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Abstract

Turbulent flows are often treated as a noisy environment by control algorithms of underwater robots. However, aquatic animals such as fish have learned to take advantage of certain unsteady flow. Periodic complex flow, such as that found in the wake of cylinders has been shown to offer energy saving opportunities to fish. We built a fish-like robot with an integrated pressure sensor array housed in the head. The robot can control its tail beat synchronization with respect to the periodic oscillations in the flow behind a cylinder. We show that vortices, represented here by pressure maxima, can be detected and exploited to increase the swimming efficiency of the robot fish while it remains rigidly mounted to a force plate. Force measurements show an efficiency gain of 23% when the tail beat of the robotic fish is synchronized at a particular phase lag.