Rotor anisotropy as a blade damage indicator for wind turbine structural health monitoring systems
We propose a novel damage indicator for a wind turbine structural health monitoring system. The indicator is based on loss of rotor isotropy due to a blade damage. The experimental technique for extracting the damage indicator from measured vibration data is proposed. We demonstrate the damage indicator using a simple rotor model, on data from simulated wind turbine and finally, on experimentally obtained data.
rotor anisotropy wind turbine floquet analysis linear periodic time variant system operational modal analysis