کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8065320 1520681 2015 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Robust frequency-domain identification of parametric radiation force models for a floating wind turbine
ترجمه فارسی عنوان
شناسایی فرکانس مستحکم مدل های نیروی تابشی پارامتری برای توربین بادی شناور
کلمات کلیدی
توربین بادی شناور، شناسایی دامنه فرکانس، شناسایی دامنه زمان، نیروهای تابش، مدل فضایی دولتی،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی دریا (اقیانوس)
چکیده انگلیسی
This paper mainly concerns the hydrodynamic responses prediction of a floating wind turbine. A new frequency-domain identification approach is first proposed to fit a parametric model (state space model) to approximate the convolution term in the Cummins equation of the floating wind turbine. This frequency-domain identification approach consists of finding the vector of parameters that give the best least squares fitting to the frequency responses, and a damped Gauss-Newton algorithm is first proposed to solve this non-linear least squares problem. The damped Gauss-Newton algorithm consists of calculating an increment vector based on the information of residuals and Jacobian values, finding a “fraction” factor by using a line search algorithm, then updating the values of the vector of parameters until the norm of the gradient vector is less than a specific tolerance value. Various kinds of hydrodynamic radiation forces (moments) and motion responses of this floating wind turbine have been calculated. For comparison purpose, the calculation results based on a time-domain identification approach for fitting the state space model are also included in this paper. This time-domain identification approach is based on finding a parametric transfer function of an auto-regressive moving-average (ARMA) filter based on prescribed time domain responses by using Prony׳s method. The accuracy and efficiency of our proposed frequency-domain identification approach have been convincingly substantiated through the comparisons of the calculation results in this article.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ocean Engineering - Volume 109, 15 November 2015, Pages 580-594
نویسندگان
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