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Aided Inertial Measurement System Applied to Torpedo Pile Trajectory Reconstruction

[+] Author Affiliations
Rodrigo Sauri Lavieri, Eduardo Aoun Tannuri, André L. C. Fujarra

University of São Paulo, São Paulo, SP, Brazil

Diego Cascelli Corrêa

Petrobas E&P, Rio de Janeiro, RJ, Brazil

Paper No. OMAE2011-49080, pp. 59-66; 8 pages
doi:10.1115/OMAE2011-49080
From:
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 1: Offshore Technology; Polar and Arctic Sciences and Technology
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4433-5
  • Copyright © 2011 by ASME

abstract

Torpedo pile has become one of the most popular foundation systems in Brazil’s offshore oil exploitation, mostly, due to its low installation cost. Additionally, torpedo piles have shown good fixation capability even when applied in mooring configuration such as taut leg with relatively close angles to the vertical. This fixation capability is closely dependent to the depth of penetration and the final attitude of the pile. In order to determine these parameters, MEMS-based Inertial Measurement Units have been used. Units of this kind are known for high noise density and, alone, are not adequate to any kind of navigation. Concerning these limitations, other sources of data are added to the inertial measurements, in order to improve the system state estimation. This data fusion is carried out by the Kalman Filtering and is also called Aided Inertial Measurement Units. This paper presents the Kalman Filter implementation and the results obtained from the fusion of the pressure gage signal, alternative pitch and roll measurements and the inertial measurements applied to the torpedo pile deployment.

Copyright © 2011 by ASME

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