Adaptive second-order Volterra filtering and its application tosecond-order drift phenomena |
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Authors: | Kiho Kim Sung Bae Kim Powers E.J. Miksad R.W. Fischer F.J. |
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Affiliation: | Offshore Technol. Center, Texas Univ., Austin, TX ; |
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Abstract: | This paper presents an adaptive second-order Volterra filter and its application to model-test data of a prototype tension leg platform (TLP). The least-squares approach of a second-order Volterra model and its adaptive filtering algorithm based on recursive least-squares are introduced. The second-order Volterra filter is applied to identify the linear and quadratically nonlinear relationship between irregular sea wave excitation and the surge response of a tension leg platform. Next, a deconvolution technique, based on the impulse invariance standard Z-transform, is utilized to recover the linear and quadratic forces exerted on the TLP |
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