Active noise control using piezoelectric actuator for a machine

Xiao-Qi Bao; Zoubeida Ounaies; Vijay K. Varadan; Vasundara V. Varadan

doi:10.1117/12.174058

1 May 1994 Active noise control using piezoelectric actuator for a machine

Xiao-Qi Bao, Zoubeida Ounaies, Vijay K. Varadan, Vasundara V. Varadan

Proceedings Volume 2189, Smart Structures and Materials 1994: Smart Materials; (1994) https://doi.org/10.1117/12.174058
Event: 1994 North American Conference on Smart Structures and Materials, 1994, Orlando, FL, United States

Abstract

The use of active noise control applied to an industrial machine is investigated. The control system consists of an analog controller, an optical synchronous sensor, an error microphone, and an actuator. The signal from the optical sensor, which is synchronized with the impacts, is compensated by the controller and then sent to the actuator. The controller automatically adjusts itself according to the error signal to get maximum noise reduction. Instead of the more traditional loudspeakers used in noise control systems, a piezoelectric actuator is developed to work in a harsh industrial environment. The actuator is basically a bending mode vibrator made of aluminum and PZT (lead zirconate titanate) plates and is able to work in the frequency range of interest. A computer program based on the finite element approach was developed to aid the design of the actuator. The predicted output and the measured one agree very well. The system is tested in a laboratory setup by replaying the noise recorded from the machine. A reduction of 10 dB(A) is achieved.

Citation Download Citation

Xiao-Qi Bao, Zoubeida Ounaies, Vijay K. Varadan, and Vasundara V. Varadan "Active noise control using piezoelectric actuator for a machine", Proc. SPIE 2189, Smart Structures and Materials 1994: Smart Materials, (1 May 1994); https://doi.org/10.1117/12.174058

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