In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 131, No. 4_Supplement ( 2012-04-01), p. 3472-3472
Abstract:
Previous studies have shown that, similar feedback gains are required to minimize the kinetic energy of a plate and to maximize the absorbed energy by each force actuator in a wide-band excitation. The energy absorption of a force actuator is easy to measure, but it is hard to get the energy absorption by a moment actuator such as a piezoelectric patch actuator which needs the angular velocity at the mounting point of the actuator. In this paper, the energy absorption of piezoelectric patch actuators for decentralized velocity feedback control of plate vibrations is investigated numerically. A kind of virtual energy absorption of the piezoelectric patch actuator is proposed, which is the multiplication of the torque produced by the piezoelectric patch actuator and the velocity at the mounting point of the actuator. Numerical investigations are performed to explore the relationship of the virtual energy absorption by the piezoelectric patch actuators and the kinetic energy of the structure. The results show that maximizing the wide-band virtual energy absorption is nearly equivalent to minimizing the kinetic energy.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
2012
detail.hit.zdb_id:
1461063-2
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