Stationary and non-stationary random vibration modelling and analysis for an operating wind turbine
The output-only identification of an operating wind turbine dynamics is performed. Stationary/non-stationary methods employed and compared. TAR modeling used for the first time for wind turbines and enables TV identification. Cyclo-stationary behaviour due to blade rotation is found on the WT modes. Non-stationary behaviour due to wind strongly affects WT vibrations.
non-stationary random vibration wind turbines output-only identification time-dependent autoregressive models in-operation identification timefrequency analysis