... of an inductor and a negative resistance circuit serially connected to the piezoelectric transducer that is bonded/embedded to the structure. By using the negative resistance element to reduce the overall resistance of the circuitry to be negative, the resonant vibratory response of the structural system becomes...

... mounted on a rotating hub. Assuming Euler–Bernoulli beam equations and considering the effect of a piezoelectric transducer, equations of motion are derived using the Lagrangian approach followed by relationships describing the harvested power. The equations provide a quantitative description of how...

... excessive when the bladed disk is mistuned, and may cause fatigue damage to the engine components. To effectively suppress vibration in bladed disks, a piezoelectric transducer networking concept has been explored previously by the authors. While promising, the idea was developed based on a simplified...

.... The proposed model includes the mass and stiffness of the actuator and thus provides a more accurate prediction when a structure is bonded with multiple actuators. 18 10 2004 06 06 2006 11 01 2008 structural acoustics vibrations acoustic transducers piezoelectric transducers inverse...

...Daniel M. Peairs; Pablo A. Tarazaga; Daniel J. Inman Impedance-based structural health monitoring uses collocated piezoelectric transducers to locally excite a structure at high frequencies. The response of the structure is measured by the same transducer. Changes in this response indicate damage...

... 19 02 2007 surface acoustic waves piezoelectric transducers condition monitoring Fourier transforms crack detection modal analysis ultrasonic imaging phased array radar structural health monitoring SHM Lamb waves piezoelectric wafer active sensor PWAS tuning sensors phased...

... are examined in detail. 16 05 2006 08 02 2007 condition monitoring structural acoustics acoustic waveguides composite materials piezoelectric transducers piezoceramics elasticity Conformal anisotropic macro fiber composite (MFC) transducers, shown in Fig. 1 , were developed...

..., are not taken into account, the method is apparently unable to differentiate between defects (whose detection is the purpose of the method) and nonrelevant features (related to the boundary conditions). A simple nonlinear vibration experiment is described which employs piezoelectric transducers (PZT) and two...

... complex and advanced techniques may be required. One advanced technique involves using an array of piezoelectric transducers to generate or sense elastic waves in the structure under inspection. By adjusting the spacing and/or phasing between the piezoelectric transducers, transmitted or received waves...

.... In contrast to piezoelectric bimorphs, ionomeric polymers exhibits strains greater than 2% and can be operated at voltages on the order of 1– 5 V ( 1 ). piezoelectric transducers acoustic transducers polymers cantilevers beams (structures) piezoceramics elastic moduli intelligent...

... in both design and maintenance. acoustic measurement ultrasonic materials testing acoustic emission testing piezoelectric transducers structural acoustics 19 02 2006 29 09 2006 2007 American Society of Mechanical Engineers ...

... piezoelectric transducer is calculated from Eq. 4 , when T = 0 5 I = i ω ∫ ∫ D 3 d x d y = i ω ∫ ∫ ε 33 T ( 1 − δ ) E 3 d x d y where ω is the angular frequency, δ is the dielectric loss tangent of the PZT material, and x , y...

... OF VIBRATION AND ACOUSTICS . Manuscript received June 24, 2004; final revision June 24, 2004. Associate Editor: Chin An Tan. 24 June 2004 24 June 2004 21 12 2004 low-pass filters piezoelectric transducers acoustic signal detection vibrations sensor fusion plates (structures...

... and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS . Manuscript received August 2003; Revised January 2004. Associate Editor: R. F. Keltie. 01 August 2003 01 January 2004 30 07 2004 piezoelectric transducers loudspeakers acoustic generators acoustic intensity...

... . Manuscript received May 2002; Revised March 2003. Associate Editor: M. I. Friswell. 01 May 2002 01 March 2003 30 07 2004 laser velocimetry structural acoustics piezoceramics piezoelectric actuators piezoelectric transducers In summary, the review of the technical...

... = 4 , n = 2 toroidal shell mode microcontrollers vibration control micromechanical devices vibrations piezoelectric actuators piezoelectric transducers Over the years, toroidal shells have been used or proposed for structures and/or components of tubular cooling...

... damping vibration control vibrations piezoceramics piezoelectric transducers State-switched devices are capable of swiftly altering their dynamical properties (i.e., their mass, stiffness, or damping). Such a capability, depending upon how it is controlled and implemented, broadens...

... with a piezoelectric transducer used as the actuator and tip-accelerometer as the sensor. The actuator and sensor are non-collocated. The Lagrangian formulation is used to obtain mathematical model of the flexible link dynamics with piezo actuator. For control design purposes, a finite dimensional approximate model...

... 02 2004 shells (structures) dynamic response distributed control bending piezoelectric transducers strain measurement strain sensors neural nets membranes structural acoustics electric potential Effective distributed structural control depends on accurate measurements...

... OF VIBRATION AND ACOUSTICS . Manuscript received October 2000; Revised September 2002. Associate Editor: H. S. Tzou. 01 October 2000 01 September 2002 01 04 2003 piezoelectric transducers acoustic transducers Efficient airborne sound sources are important for applications...