A new adaptive resonance frequency of piezoelectric components used for vibration damping.
This paper describes two methods for vibration damping in a broad band frequency range using a piezoelectric patch. The first method, applied to an adaptive device, uses a bias (static voltage control), which applies stresses or releases stresses in a piezoelectric component to modify its mechanical characteristics and thereby its resonance frequency. The second method is based on a semipassive approach [synchronized switch damping (SSD)], developed to control structural vibration damping using a piezoelectric component. Attenuations of 10 and 4.8 dB in vibration velocity have been obtained using the adaptive frequency and SSD methods.
Faiz
A
A
Laboratoire de Biophysique Audioprothese, Faculte de Pharmacie, Nancy University, Nancy 54000, France. adil.faiz@pharma.uhp-nancy.fr
Petit
L
L
Guyomar
D
D
Ducourneau
J
J
D000162:Acoustics / Q000295:instrumentation*; D000669:Amplifiers, Electronic; D025802:Electric Capacitance; D017097:Electric Impedance; D004867:Equipment Design; D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013314:Stress, Mechanical; D014159:Transducers; D014732:Vibration