An ANVC System with Inertial Mass Actuators

Document type: Conference Papers
Peer reviewed: Yes
Author(s): Mathias Winberg, Thomas L Lagö
Title: An ANVC System with Inertial Mass Actuators
Conference name: Inter-Noise 98
Year: 1998
City: Christchurch, New Zeeland
Organization: Blekinge Institute of Technology
Department: Dept. of Signal Processing (Institutionen för signalbehandling)
Dept. of Signal Processing S-372 25 Ronneby
+46 455 38 50 00
Authors e-mail:
Language: English
Abstract: 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. 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 four 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.
Subject: Signal Processing\Active Noise and Vibration Control
Signal Processing\General