Identification of transfer functions from surge motion response of a semisubmersible platform using time-varying NARX model
Identification of transfer functions from surge motion response of a semisubmersible platform from model test data is presented in this paper. The identification is carried out by estimating the time-varying model coefficients of a time-varying NARX (TVNARX) model. The coefficients are estimated usi...
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| Main Authors: | , , , |
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| Format: | Article |
| Published: |
Elsevier Ltd
2016
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| Online Access: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84947997349&doi=10.1016%2fj.apor.2015.11.001&partnerID=40&md5=9814100203056d741055879a2de0b658 http://eprints.utp.edu.my/25559/ |
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| Institution: | Universiti Teknologi Petronas |
| Summary: | Identification of transfer functions from surge motion response of a semisubmersible platform from model test data is presented in this paper. The identification is carried out by estimating the time-varying model coefficients of a time-varying NARX (TVNARX) model. The coefficients are estimated using proposed method, named artificial bee colony-based Kalman smoother (ABC-KS). System input-output data for identification process are wave height and surge motion from a scaled 1:100 model of a prototype semisubmersible. The applicability of proposed method is assessed numerically and experimentally under unidirectional long-crested random waves. The results show that the linear and quadratic frequency response functions as well as the wave and low frequency responses of a semisubmersible platform can be well identified either in time or frequency domains. The evolution of the nonlinear wave-structure interactions also can be revealed with respect to measured time duration. © 2015 Elsevier Ltd. |
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