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Active Control of Noise Using Actuator/Sensor ArraysCurrent research in smart structures is directed toward the integration of many actuators and sensors into a material. In this paper we investigate the possibility of using this instrumentation for active noise control from a vibrating structures. Current technology for reducing radiated sound is limited by the instrumentation for the control system. These control systems employ relatively small numbers of sensors and actuators. Hence, these control systems must rely on a model of the structure to estimate and control the global vibrations that contribute to the far field pressure. For complex, realistic structures the development of such a model is a formidable task. The model is a limiting factor in the continuing development of structural acoustics. In this paper we propose to increase the number of actuators and sensors of a smart material to offset the complexity of the model used for control design. The sensor arrays will be used to directly sense the shape of the structure rather than using a model of the structures to indirectly sense the shape of the structure. The actuator array is used to apply distributed forces to the structure, rather than using the structure itself as a load path. A control system for the active cancellation of sound is derived from standard control system methodologies.
Document ID
19960047664
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lindner, Douglas K.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA United States)
Winder, Patrice
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA United States)
Kirby, George
(Naval Research Lab. Washington, DC United States)
Date Acquired
August 17, 2013
Publication Date
March 1, 1996
Publication Information
Publication: Proceedings of the 4th Annual Workshop: Advances in Smart Materials for Aerospace Applications
Subject Category
Acoustics
Accession Number
96N33274
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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