Piezoelectric Sensor Configuration for Active Structural Acoustic Control

Advanced error sensing strategy for estimating amplitudes of the first few radiation modes of vibrating surface

“…Tanaka et al [6] employed distributed PVDF sensors as error sensors to measure the radiation modes of simply supported plate. Berkhoff [7] considered the measurement of the high order radiation modes with PVDF array sensors. Also, more elaborate methods of trying to predict the radiated sound power using structurally measured variables measured at a number of points [8].…”

Practical implementation of an acoustic-based modal filtering sensing technique for active noise control

“…To date researchers have by-passed the frequency dependence problem by evaluating the error quantities, the orthogonal radiators, at the highest control frequency. This has shown to produce attenuation at lower, targeted, frequencies [18,[34][35][36]. By evaluating the radiation mode shapes at the highest control frequency, frequency variation has been effectively ignored allowing the modal filtering to be performed using only a multiplication and addition process.…”

“…In practice, some noise sources are structural, others are not. The structural approach to modal filtering has seen the use of shaped sensors [11,[13][14][15], accelrometors [7,9,12,[16][17][18][19][20][21] or pizeo patches [18,[22][23][24][25] implemented on rectangular panels with simply supported boundary conditions.…”

A rapid prototyping system for broadband multichannel active noise and vibration control

“…The use of accelerometers led to noise reductions that were approximately 1 dB higher than obtained with the piezoelectric patch sensors. However, the use of piezoelectric patches was found to lead to more robust performance, probably due to the spatial averaging by these sensors [11] andor the reduced high-frequency content of the sensor signals. In this paper only the results for the piezoelectric patch sensors will be shown.…”

“…A control system is used to reduce the sound transmitted through the panel (See Refs. [10][11][12]). Possible applications can be found in buildings, trains, cars, aircrafts, etc.…”