Dissipative Feedback Control of a Reverberant Enclosure Using a Constant Volume Velocity Source

S. A. Lane; R. L. Clark

doi:10.1115/1.2893931

Journal of Vibration and Acoustics | Volume 120 | Issue 4 | Research Paper

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Dissipative Feedback Control of a Reverberant Enclosure Using a Constant Volume Velocity Source

S. A. Lane and R. L. Clark

[+] Author and Article Information

S. A. Lane, R. L. Clark

Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708-0302

J. Vib. Acoust 120(4), 987-993 (Oct 01, 1998) (7 pages) doi:10.1115/1.2893931 History: Received April 01, 1998; Online February 26, 2008

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Abstract

Loudspeakers are commonly used as actuators in active noise control applications. In this work, a loudspeaker is compensated so that it approximates a constant volume velocity source over the piston mode frequency range (up to approximately 600 Hz). This moves the speaker dynamics out of the desired control bandwidth (20 Hz–500 Hz). A static gain feedback controller using the compensated speaker is applied to a rigid-wall enclosure to reduce the acoustic potential energy of the system while being subjected to low frequency broadband noise. The results are compared to the performance of a similar control law using an uncompensated speaker, and a model based H2 optimal controller. The results indicate that the controller using the compensated speaker offers definite advantages in terms of stability and performance, while requiring a minimal amount of control effort.

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Lane SA, Clark RL. Dissipative Feedback Control of a Reverberant Enclosure Using a Constant Volume Velocity Source. ASME. J. Vib. Acoust. 1998;120(4):987-993. doi:10.1115/1.2893931.

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Dissipative Feedback Control of a Reverberant Enclosure Using a Constant Volume Velocity Source

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