Understanding the power requirements of autonomous underwater systems, Part I: An analytical model for optimum swimming speeds and cost of transport

Phillips, Alexander; Haroutunian, Maryam; Murphy, Alan J.; Boyd, Stephen; Blake, James; Griffiths, Gwyn. 2017 Understanding the power requirements of autonomous underwater systems, Part I: An analytical model for optimum swimming speeds and cost of transport. Ocean Engineering, 133. 271-279. https://doi.org/10.1016/j.oceaneng.2015.12.014

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© 2015 Elsevier B.V. This is the author’s version of a work that was accepted for publication in Ocean Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version will be published in Ocean Engineering
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Abstract/Summary

Many marine species exhibit capabilities that would be desirable for manmade systems operating in the maritime environment. However, without detracting from the potential, if bioinspiration is to prove beneficial, it is important to have a consistent set of metrics that allow fair comparison, without bias, when comparing the performance of engineered and biological systems. In this study we focus on deriving an unbiased metric of performance applicable to marine animals and engineered subsea vehicles for one of the most fundamental of properties; that of the energy cost of locomotion. We present a rational analytical model of the physics behind the total energy cost of locomotion applicable to both biological and engineered autonomous underwater marine systems. This model proposes the use of an equivalent spheroid efficiency as a fair metric to compare engineered and biological systems. The model is then utilised to identify how changes in mass, speed, spheroid efficiency and hotel load impact the performance of the system.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1016/j.oceaneng.2015.12.014
ISSN:	0029-8018
Additional Keywords:	bioinspiration; Autonomous Underwater Vehicles; hydrodynamics; cost of transport
Date made live:	15 Dec 2015 10:20 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/512442

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1016/j.oceaneng.2015.12.014

ISSN:

0029-8018

Additional Keywords:

bioinspiration; Autonomous Underwater Vehicles; hydrodynamics; cost of transport

Date made live:

15 Dec 2015 10:20 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/512442