Print Email Facebook Twitter An acoustic radiator with integrated cavity and active control of surface vibration Title An acoustic radiator with integrated cavity and active control of surface vibration Author Berkhoff, A. Tajdari, F. Publication year 2017 Abstract This paper presents a method to realize an acoustic source for low frequencies with relatively small thickness. A honeycomb plate structure which is open on one side combines the radiating surface and the major part of the air cavity. The vibration of the plate is controlled with a decentralized feedback controller. The fundamental resonance caused by the mass of the plate and the compliance of the air cavity are controlled, as well as the first-order bending mode, while avoiding possible instabilities due to the fluid-structure interaction. The smooth and well defined frequency response enables robust feedforward control for further response equalization. The influence of different actuation principles on the overall system efficiency is compared. Subject 2015 Observation, Weapon & Protection SystemsAS - Acoustics & SonarTS - Technical SciencesAcousticsFluid structure interactionFrequency responseVibrations (mechanical)Acoustic sourcesActuation principlesDecentralized feedbackFundamental resonancePlate structureRadiating surfaceSurface vibrationSystem efficiencyPlates (structural components) To reference this document use: http://resolver.tudelft.nl/uuid:ebd802ec-8c84-4f69-a12a-0d7b331a0aea TNO identifier 777347 Publisher Audio Engineering Society Source 142nd Audio Engineering Society International Convention 2017, AES 2017. 20 May 2017 through 23 May 2017 Document type conference paper Files To receive the publication files, please send an e-mail request to TNO Library.