Active–passive Piezoelectric Absorbers for Systems Under Multiple Non-Stationary Harmonic Excitations

Morgan, Ronald A.; Wang, K.W.

doi:10.1006/jsvi.2001.4184

Cited by 28 publications

(24 citation statements)

References 8 publications

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“…In previous studies, it was shown that adding active control concurrently with passive piezoelectric shunts could result in very effective vibration control devices 7,8 . It was also illustrated that such arrangement could be beneficial for energy confinement 9,10 .…”

Section: Problem Statement and Objectivementioning

confidence: 99%

Vibration isolator design via energy confinement through eigenvector assignment and piezoelectric networking

Wang

2004

Smart Structures and Materials 2004: Damping and Isolation

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The objective of this research is to investigate the feasibility of utilizing eigenvector assignment and piezoelectric networking for enhancing vibration isolator design through energy confinement. For a classical periodic isolator structure, the material discontinuity creates stop bands that could suppress the wave propagation of external excitation in a particular frequency range. While effective, such method can not always create wide enough stop bands such that all the disturbance frequencies are covered. In this study, the eigenvector assignment technique and piezoelectric networks are utilized to reduce the transmissibility of the isolator modes near the boundary of the stop bands, and therefore widen the effective frequency range and enhance the performance of the isolator.The eigenvector assignment principle is to alter the mode shapes of the system so that the modal components have smaller amplitude in concerned coordinates than in other parts of the system. By applying the eigenvector assignment method on the spatially tailored periodic isolator structure, the attenuated end (the end of the isolator designed to have small vibration) response amplitude at resonant frequencies near the stop band can be reduced, which enhances the vibration isolation performance in the frequency range of interest. On the other hand, piezoelectric networks connecting to the isolator structure increase the degrees of freedom of the integrated system, and enlarge the design space for achievable eigenvectors. The right eigenvectors of this integrated system are selected such that the modal energy in the concerned area is minimized by using the Rayleigh Principle. The integrated system with assigned eigenvectors will re-distribute vibratory energy of the complete electromechanical system. Small vibration at the attenuated end of the isolator is achieved since the energy is confined in the circuitry and other parts of the isolator.Numerical simulations are performed to evaluate the effectiveness of the proposed method on vibration confinement for isolator designs. Frequency responses of the different generalized coordinates in the selected frequency range are illustrated. It is shown that with the piezoelectric networking and eigenvector assignment, the system energy is redistributed and confined in the unconcerned areas, which can greatly enhance the performance of the vibration isolation system.

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Section: Problem Statement and Objectivementioning

confidence: 99%

Vibration isolator design via energy confinement through eigenvector assignment and piezoelectric networking

Wang

2004

Smart Structures and Materials 2004: Damping and Isolation

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“…In the active-tuned solid state piezoelectric absorber developed by Davis and Lesieutre (1998), a passive capacitive shunt circuit is used for electrically adjusting the effective stiffness and consequently the resonance frequency of the piezoelectric components. In the approach suggested by Morgan and Wang (2002), an arrangement comprising an adaptive tuning inductor, a negative resistance, and a coupling creates a system with multimodal damping capacity.…”

Section: Disadvantagesmentioning

confidence: 99%

A new adaptive resonance frequency of piezoelectric components used for vibration damping

Faiz¹,

Petit

Guyomar

et al. 2010

The Journal of the Acoustical Society of America

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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.

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“…For example a typical system is floating raft on which several rotary machines are mounted [19]. Many kinds of multiple-shunt piezoelectric shunt damping which could be made effective against several frequencies have been developed [11,14]. However, the frequencies were required to be known in advance such that a suitable filter network could be designed such that each shunt acted only against a single frequency, with all other frequencies blocked.…”

Section: Introductionmentioning

confidence: 99%

“…Semi-active vibration absorbers can be separated into several types: variable stiffness through mechanical mechanisms [2,8,16,17] or using controllable new materials [6,12,13,18], variable inductor connected in series with the piezoelectric patch for piezoelectric absorbers [7,[9][10][11]. The first two types are used widely which can be tuned to the varying frequency by changing their resonant frequency.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, semi-active and active-passive vibration absorbers have been proposed to suppress harmonic excitations with time-varying frequency [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Semi-active vibration absorbers can be separated into several types: variable stiffness through mechanical mechanisms [2,8,16,17] or using controllable new materials [6,12,13,18], variable inductor connected in series with the piezoelectric patch for piezoelectric absorbers [7,[9][10][11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Application of dynamic vibration absorbers in structural vibration control under multi-frequency harmonic excitations

et al. 2008

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Active–passive Piezoelectric Absorbers for Systems Under Multiple Non-Stationary Harmonic Excitations

Cited by 28 publications

References 8 publications

Vibration isolator design via energy confinement through eigenvector assignment and piezoelectric networking

Vibration isolator design via energy confinement through eigenvector assignment and piezoelectric networking

A new adaptive resonance frequency of piezoelectric components used for vibration damping

Application of dynamic vibration absorbers in structural vibration control under multi-frequency harmonic excitations

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