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Study on the Estimation Method for Wind Speed and Direction on Ship Surface Based on Wavelet Transform and Least Squares Support Vector Machine(LS-SVM)
Author(s): 
Pages: 66-70
Year: Issue:  2
Journal: Ocean Technology

Keyword:  wavelet transformleast squares support vector machineshort-term wind speed and directionestimation methodanchoring condition;
Abstract: In order to estimate the wind speed and direction on ship surface in the next half hour under the anchoring condition, an estimation method is proposed in this paper based on wavelet transform and least squares support vector machine. Firstly, the X-axis and Y-axis wind speeds are obtained by orthogonal decomposition from the original wind data series. Then the low and high frequency data series are extracted by wavelet decomposition. Secondly, based on the theory of least squares support vector machines, the prediction is made for the low and high frequency series, and the wind estimation values of X-axis and Y-axis are obtained respectively by the superposition of the predicted results of all series. Finally, the estimation values of wind speed and direction in the next half hour are obtained simultaneously by using the vector algorithm. The proposed method is evaluated with the wind data measured by the ship-borne meteorological instrument on the anchoring ship in the East China Sea. The results show that this method has high estimation precision.
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