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Study into the use of the GNSS for maritime structure analysis

Bélanger, Joseph François Maurice (2009) Study into the use of the GNSS for maritime structure analysis University of Southampton, School of Engineering Sciences, Doctoral Thesis , 160pp.

Record type: Thesis (Doctoral)

Abstract

Certain civilian uses of the Global Positioning System (GPS) now demand levels of precision exceeding the original military specifications for the system. For example, at present, GPS is used in surveying, navigation and monitoring applications. Although GPS has been used previously to monitor the structural integrity of civilian structures such as bridges and towers, the experimental conditions have one significant difference: These structures are all immobile allowing for fixed references to be used.
This research’s ultimate aim was to conduct a feasibility study into the use of GPS, and of the soon to be deployed Galileo constellation, in structural monitoring of maritime vessels. Under these conditions, a fixed base station as was used in previous structural monitoring is not a valid approach. New techniques, or variations on the current ones, were examined to deal with this lack of a fixed reference.
This thesis considers the simulator that was developed in the early phases of the project and the results that were generated. An expanded version of the simulator is then explained, alongside the processes used to model structural deformation experienced by a ship at sea. Frequency analysis of the simulator results is also performed and the results detailed. It is found that frequency-domain analysis allows for the identification of different movements seen on the structure. In addition, an analysis of the impact the deployment of the Galileo constellation is conducted using simulation. This simulation found a drop of about 20% in Dilution of Precision (DOP) over several areas.
This thesis then examines some of the field work, that aimed to measure rigidbody motion, that was conducted onboard Red Jet 4, a catamaran-type vessel. The experimental setup is described, and the results are briefly considered.
A method for determining the optimal configuration of the receiver network is also proposed alongside an algorithm to detect plastic deformation of a vessel structure. Finally, this report considers the original project objectives and how these were or were not met. Should sufficient accuracy be achieved by a GPS receiver network, it is possible to use the system to monitor ship structures.

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More information

Published date: 13 January 2009
Organisations: University of Southampton, Astronautics Group

Identifiers

Local EPrints ID: 67321
URI: http://eprints.soton.ac.uk/id/eprint/67321
PURE UUID: 10cc69da-fee0-4ace-a6a8-648204d3cc41

Catalogue record

Date deposited: 27 Aug 2009
Last modified: 19 Jul 2017 00:20

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Contributors

Author: Joseph François Maurice Bélanger
Thesis advisor: Adrian Tatnall

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