NDLI: Analog Velocity Feedback Controller for Vibration Suppression and Sound Attenuation

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Boz, Utku Ku¨lah, Serkan Arıdog˘an, Ug˘ur Bas¸dog˘an, I˙pek
Copyright Year	2011
Abstract	In this paper, an analog velocity feedback controller is considered for active vibration suppression of a thin plate for attenuation of sound levels in the frequency range of 0–100 Hz. The active control methods can be applied to interior cavity noise reduction, as encountered for instance in automotive applications. For that purpose, a simplified experimental vibro-acoustic cabin model was built in our laboratory and developed methodologies are demonstrated on the set-up. The set-up includes a rectangular box (1 × 1 × 2 m) which is separated with a flexible thin plate (1 × 1 × 0.001 m) to obtain two enclosed cavities: the passenger compartment (PC) and the engine compartment (EC). The vibration control is applied only on the flexible plate since the walls enclosing the cavities are made of more rigid material (wood filled concrete). By employing piezoelectric patch as actuator and laser doppler vibrometer as vibration sensor, an analog proportional velocity feedback controller is designed and built experimentally for suppressing the low-frequency modes of the flexible plate. In order to attenuate only lower-frequency structural modes of the thin panel, pre-filters are also included in analog circuit. The vibration of thin plate and sound in the passenger compartment is measured for controller-inactive and active cases while disturbing the thin plate via shaker. By measuring vibration and sound response, closed and open loop experimental frequency responses are obtained and presented. The aim of this experimental study is to investigate performance of active vibration control applications on acoustic attenuation as the first step towards robust structural acoustic control.
Sponsorship	Aerospace Division
Starting Page	207
Ending Page	214
Page Count	8
File Format	PDF
ISBN	9780791854723
DOI	10.1115/SMASIS2011-5050
Volume Number	ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2
Conference Proceedings	ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
Language	English
Publisher Date	2011-09-18
Publisher Place	Scottsdale, Arizona, USA
Access Restriction	Subscribed
Subject Keyword	Actuators Vibration Control equipment Analog circuits Acoustics Noise control Engines Concretes Cavities Filters Laser doppler vibrometers Feedback Automotive industry Wood products Vibration suppression Vibration control Frequency response Sensors
Content Type	Text
Resource Type	Article

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