ADD.Sound® – Active Tonal Noise Reduction in the Drive Train

ADD.Sound is an active system for reducing tonalities in wind turbines. It measures vibrations directly on the gearbox, calculates in real time the counterforces required and applies them precisely in phase via actuators. This actively stabilises the drive train and significantly reduces the emission of tonal noise – with full energy yield and unchanged operating behaviour.

ADD.Sound can be used both during the development phase of new turbines and in existing wind turbines. Owing to its modular design, the system can be flexibly integrated – directly on the gearbox or in the hub – and thus adapted to different drive train concepts and installation space requirements.

ADD.Sound combines efficiency, flexibility, and scalability to ensure optimal vibration damping in wind turbines.

• High force scalability through multiple actuators, allowing flexible adaptation to various requirements.
• High damping force with minimal moving mass, enabling efficient vibration reduction.
• Flexible positioning on the gearbox or hub thanks to a modular concept, facilitating easy integration even in confined spaces.
• Retrofit option available, allowing for seamless upgrades to existing systems.
• Broadband compensation across the entire operational range, without the need for hardware adjustments.
• Simultaneous compensation of multiple vibration orders (Single or synchronous damping of 1st and 2nd gear mesh / excitation frequency).
• Damping of all relevant gearbox or hub modes (e.g., rolling, yaw, pitch, and torsion).