DEVELOPMENT OF A NOVEL TIME-FREQUENCY ENHANCED VOLTERRA SYSTEM IDENTIFICATION METHOD FOR THE MODELING OF A NONLINEAR OWC WAVE ENERGY CONVERTER UNDER IRREGULAR SEA WAVE EXCITATION

摘要

A system identification method combining the virtues of the Volterra series and Hilbert-Huang transform and developed for the modelling of the nonlinear dynamic pressure fluctuation inside the chamber of an Oscillating Water Column wave energy converter (OWC-WEC) is presented. The proposed method is validated for the case where the excitation corresponds to a general nonlinear stationary signal.