Broadband noise reduction of piezoelectric smart panel featuring negative-capacitive-converter shunt circuit

A broadband noise reduction of a piezoelectric smart panel featuring a negative capacitance converter (NCC) shunt circuit is experimentally investigated. Piezoelectric shunt damping utilized on the panel structure is attractive for noise reduction especially at low resonance frequencies of the structure. To achieve a broadband noise reduction, however, a multimode shunt is necessary. The NCC circuit can be an ideal broadband shunt circuit by nullifying the capacitance of the piezoelectric patch with the circuit. Since the intrinsic capacitance of the patch is not constant with the frequency, the broadband shunt performance of the NCC can be deteriorated. Thus, we introduce the dual-patch NCC circuit on the smart panel. The proposed concept is explained and the tuning and implementation procedures are addressed. The noise reduction performance of the panel is tested in terms of transmission loss according to the standard transmitted noise measurement. The broadband damping performance of the smart panel featuring a dual-patch NCC shunt is compared with the panels featuring resonant shunt circuit and ordinary NCC shunt circuit in terms of acceleration and noise transmission loss. It is found that the dual-patch NCC shunt is more efficient than ordinary NCC and resonant shunt for achieving broadband noise reduction with smart panels.

[1]  Jaehwan Kim,et al.  Multimode shunt damping of piezoelectric smart panel for noise reduction. , 2004 .

[2]  Kenji Uchino,et al.  Origins of Electric Field Induced Strains , 1997 .

[3]  Jaehwan Kim,et al.  New shunting parameter tuning method for piezoelectric damping based on measured electrical impedance , 2000 .

[4]  Chris R. Fuller,et al.  Active control of sound transmission/radiation from elastic plates by vibration inputs. I - Analysis , 1990 .

[5]  A. D. Belegundu,et al.  A general optimization strategy for sound power minimization , 1994 .

[6]  Gary H. Koopmann,et al.  A Design Method for Minimizing the Sound Power Radiated from Plates by Adding Optimally Sized, Discrete Masses , 1995 .

[7]  J. Hollkamp.  Multimodal Passive Vibration Suppression with Piezoelectric Materials and Resonant Shunts , 1994 .

[8]  Ahsan Kareem,et al.  Stochastic response of structures with fluid-containing appendages , 1987 .

[9]  A. Larky,et al.  Negative-Impedance Converters , 1957 .

[10]  Chris R. Fuller,et al.  Smart foam for applications in passive–active noise radiation control , 1997 .

[11]  Shu-yau Wu,et al.  Multiple PZT transducers implemented with multiple-mode piezoelectric shunting for passive vibration damping , 1999, Smart Structures.

[12]  Nesbitt W. Hagood,et al.  Damping of structural vibrations with piezoelectric materials and passive electrical networks , 1991 .

[13]  J. S. Bolton,et al.  SOUND TRANSMISSION THROUGH MULTI-PANEL STRUCTURES LINED WITH ELASTIC POROUS MATERIALS , 1996 .

[14]  B Balachandran,et al.  Analytical study of active control of wave transmission through cylindrical struts , 2001 .

[15]  Jaehwan Kim,et al.  Broadband transmission noise reduction of smart panels featuring piezoelectric shunt circuits and sound-absorbing material. , 2000 .