Application of a Hilbert Transform-Based Algorithm for Parameter Estimation of a Nonlinear Ocean System Roll Model

[+] Author and Article Information
O. Gottlieb, M. Feldman

Technion—Israel Institute of Technology, Haifa 32000, Israel

J. Offshore Mech. Arct. Eng 119(4), 239-243 (Nov 01, 1997) (5 pages) doi:10.1115/1.2829102 History: Received July 01, 1996; Revised June 29, 1997; Online December 17, 2007


We combine an averaging procedure with a Hilbert transform-based algorithm for parameter estimation of a nonlinear ocean system roll model. System backbone curves obtained from data are compared to those obtained analytically and are found to be accurate. Sensitivity of the results is tested by introducing random noise to a nonlinear model describing roll response of a small fishing boat. An example field calibration test of a small semisubmersible exhibiting nonlinear damping is also considered.

Copyright © 1997 by The American Society of Mechanical Engineers
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