Active structural acoustic control of band-limited disturbances

Arun Sampath; Balakumar Balachandran

doi:10.1117/12.239045

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1 May 1996 Active structural acoustic control of band-limited disturbances

Arun Sampath, Balakumar Balachandran

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Proceedings Volume 2717, Smart Structures and Materials 1996: Smart Structures and Integrated Systems; (1996) https://doi.org/10.1117/12.239045
Event: 1996 Symposium on Smart Structures and Materials, 1996, San Diego, CA, United States

Abstract

Experimental investigations into the control of noise in the interior of a three-dimensional enclosure with a flexible wall are presented for harmonic and multiple frequency disturbances. Lead zirconate titanate (PZT) patches mounted on the flexible wall are used as actuators and condenser microphones are used as acoustic sensors in a digital feedforward control scheme. The control system is effective in identifying the dominant resonances and achieving significant noise reduction for the dominant modes. Based on the studies on the effect of actuator redundancy on noise reduction, it is found that less noise reduction is achieved when there are more number of actuators than sensors. Modal spillover is also observed in some of the controlled cases.

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Arun Sampath and Balakumar Balachandran "Active structural acoustic control of band-limited disturbances", Proc. SPIE 2717, Smart Structures and Materials 1996: Smart Structures and Integrated Systems, (1 May 1996); https://doi.org/10.1117/12.239045

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