Document Detail


Acoustical methods for azimuth, range and heading estimation in underwater swarms.
MedLine Citation:
PMID:  18529348     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Acoustical Methods for Azimuth, Range and Heading Estimation in Underwater Swarms Enhanced, embodied autonomy in small submersibles enables the design and deployment of practical swarms of autonomous underwater vehicles (AUVs). The swarming paradigm requires for each vehicle location awareness of at least its near neighbors. The Serafina AUV swarming project additionally requires a localisation system which could cope with the dynamic and fast changing vehicle configurations while being small, reliable, robust, and energy efficient and not dependent on pre-deployed acoustic beacons. The short-range acoustical relative localisation system proposed here, uses hyperbolic and spherical localization concepts and provides each vehicles with the azimuth, range and heading of its near neighbours. The implementation utilises an acoustically transmitted MLS signal which provides extremely high robustness against interference by stochastic and systematic disturbances which are typical for underwater environments. The azimuth is obtained via hyperbolic positioning with improved resolution and accuracy with respect to conventional methods. Range and heading estimation is achieved by two independent methods for increased robustness; one uses the implicit synchronisation provided by the underlying inter-vehicle communication scheduling system to measure the difference of TOAs of an acoustic and a long-wave radio signals; the second relies on TDOAs and a reverse hyperbolic localisation scheme.
Authors:
Uwe R Zimmer; Navinda Kottege
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  123     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-06-05     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3007     Citation Subset:  IM    
Affiliation:
The Australian National University, 0200 Canberra, Australia, uwe.zimmer@ieee.org.
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