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Prediction of incident waves to wave energy converters (WEC) is essential tomaximize the energy absorption by controlling the WEC. Nevertheless, littlework has been done on the deterministic prediction of bi-directional waveswhose wave directions of components are 180 [deg.] opposite. To decompose andpredict such bi-directional waves, an array of three wave-rider buoys areconsidered. Buoys on both sides are used for decomposing bi-directional wavesinto progressive and regressive wave components, and the surface elevation ofthe middle buoy is predicted by these decomposed waves. The deterministic waveprediction is based on the impulse response function, and a cosine-filteredimpulse response function is proposed to reduce an error due to the truncationof the infinite length of the function. Predictions of initial uniformbi-directional waves are shown to demonstrate the performance of the impulseresponse function method to time-series prediction. Both numerical andexperimental comparisons are carried out to validate our proposals.

Decomposition and Prediction of Initial Uniform Bi-directional Water Waves Using an Array of Wave-Rider Buoys