Variable Stiffness Noise Reducer for Wind Turbine Rotor Blades

The patent applies local quality by varying the stiffness of different portions of the serrations. Specifically, the serrations are designed with different thicknesses along their length, creating regions of different stiffness. This allows the noise reducer to have both manufacturing simplicity and improved noise reduction effectiveness, as the variable stiffness enables better flexibility response to wind flow while maintaining a relatively simple overall structure.

The patent implements parameter changes by modifying the physical dimensions of the serrations to create variable stiffness characteristics. The thickness of the serrations is varied along their length, changing the structural parameter from constant to variable. This parameter change allows the noise reducer to adapt to wind flow conditions more effectively, improving noise reduction performance while maintaining ease of manufacture through a systematic design approach.

The patent resolves the complexity issue by applying local quality in a controlled manner. Instead of making the entire structure complex, only specific portions of the serrations are varied in thickness to create local stiffness differences. This localized approach achieves the desired flexibility and noise reduction effectiveness without requiring complex overall structural design, manufacturing processes, or assembly procedures.

The patent manages device complexity by implementing parameter changes in a systematic and manageable way. The thickness variation of serrations follows a defined pattern along the length of each serration, creating variable stiffness without requiring complex geometry. This approach achieves improved wind flow response and noise reduction while maintaining relatively simple manufacturing and assembly processes.