Inertial Mass Active Mounts Used in a Marine Application

• Different actuators have been developed for active noise cancellation. For volumetric applications, a loudspeaker is usually used. When the noise is induced by engines it may be more efficient to work on the noise source itself, the engine vibration. In this case it is important to have an actuator that can counteract the vibration, not the sound field. In the research project AVIIS (Active Vibration Isolation In Ships), such an actuator has been developed. The actuator is an electrodynamic, inertial mass type shaker, designed and tuned for this project. The boat used in these experiments is a Storebro Royal Cruiser 33, powered by two Volvo Penta TAMD engines. Each engine is mounted to the hull in four points. Prior research, \cite{thomas1} shows that the main transmission paths for the vibrations from the engine and the propeller to the hull, are through these mounting points. Once the hull is excited, a lot of sound and annoying noise is produced in the cabin. The main idea is to isolate these vibrations from the hull by adding a combined active and passive engine mount that will control the vibrations by minimizing the sound field in the cabin using microphones as error sensors, a so called ASAC (Active Structural Acoustic Control) approach.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Teknisk mekanik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Applied Mechanics (hsv//eng)

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