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Impedance approach to designing efficient vibration energy absorbers
Acoustical Physics, 2017The concept introduced previously by the authors on the best sound absorber having the maximum allowable efficiency in absorbing the energy of an incident sound field has been extended to arbitrary linear elastic media and structures. Analytic relations have been found for the input impedance characteristics that the best vibrational energy absorber ...
Y. I. Bobrovnitskii +2 more
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Mutual radiation impedance of multiple mode vibrators
The Journal of the Acoustical Society of America, 1985Most analyses of mutual radiation coupling to-date have assumed that the velocity distribution on each piston is fixed and known. In some problems, however, the velocity distribution on each radiator is made up of several modes and the modes interact acoustically as well as mechanically.
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Measurer of impedance characteristics of ultrasonic vibrational systems
Южно-Сибирский научный вестник, 2018В статье говорится о необходимости проведения измерений параметров ультразвуковых колебательных систем с преобразователем пьезоэлектрического типа. Рассматривается структура прибора для измерения импедансных характеристик ультразвуковых колебательных систем. The
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Broadband Vibration Suppression Assessment of Negative Impedance Shunts
Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1, 2008Piezoelectric materials allow for the manipulation of stiffness and damping properties of host structures by the application of electrical shunting networks. The use of piezoelectric patches for broadband control of vibration using a negative impedance shunt has been shown to be an effective active control solution.
Benjamin Beck +2 more
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Control of a Vibrating String using Impedance Matching
1993 American Control Conference, 1993The problem of adding damping to a vibrating string considered. An approach novel to the control community is used to define the time optimal control for this system. This approach treats the string as a waveguide and oscillations as a result of reflections at discontinuities -- namely the end points.
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Seismic vibrator earth impedance determination and compensation system
The Journal of the Acoustical Society of America, 1988An earth impedance determination and compensation system for use with a seismic vibrator utilizes output signals from accelerometers on the baseplate and reaction mass portions of the vibrator to create a signal indicative of the near-surface weathered earth layer impedance below the baseplate.
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ANALYZER OF IMPEDANCE CHARACTERISTICS OF ULTRASONIC VIBRATIONAL SYSTEMS
Южно-Сибирский научный вестник, 2018В статье приведены данные научных исследований, по разработке усовершенствованного УЗ прибора, связанных с изучением влияния акустической нагрузки на параметры и характеристики ультразвуковых колебательных систем. Отличительной особенностью представленного УЗКС, является повышение эффективности работы ультразвуковых излучателей, а так же снижение их ...
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Optical, Vibrational and Complex Impedance Studies of Linasrp2o7 Ceramic
Journal of Solid State Chemistry, 2023N. Chakchouk +3 more
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