Abstract
Renewable energy sources especially wind energy have gained much attention due to the recent energy crisis and the urge to obtain clean energy. To maintain the wind turbine in operation healthily, implementation of condition monitoring system and fault detection system is necessary. In wind turbine condition monitoring, vibration analysis is a common and affective way to apply in the feature extraction and fault diagnosis, especially in the rotation parts. The blade–cabin–tower coupling system is analyzed in this paper. At first, the coordinate system and the kinetic equation are established. The tower natural frequency is calculated based on the coordinate system and the random following wind vibration is analyzed. In the end, the total wind force in blade–cabin–tower coupling system is solved.
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