Download e-book for kindle: Adaptive Structural Systems with Piezoelectric Transducer by Kon-Well Wang, Jiong Tang

By Kon-Well Wang, Jiong Tang

ISBN-10: 038778750X

ISBN-13: 9780387787503

ISBN-10: 0387787518

ISBN-13: 9780387787510

Adaptive Structural platforms with Piezoelectric Transducer Circuitry presents a complete dialogue at the integration of piezoelectric transducers with electric circuitry for the improvement and enhancement of adaptive structural structures. masking a variety of interdisciplinary examine, this monograph offers a paradigm of taking complete good thing about the two-way electro-mechanical coupling features of piezoelectric transducers for structural keep an eye on and identity in adaptive structural platforms. providing descriptions of set of rules improvement, theoretical research and experimental research, engineers and researchers alike will locate this a necessary reference.

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Extra info for Adaptive Structural Systems with Piezoelectric Transducer Circuitry

Sample text

Beam response under external excitation. : open circuit response; : short circuit response (without negative capacitance); : short circuit response with negative capacitance. 14nF. ) is used to form the negative capacitance. 8nF. The primary limitation on the negative capacitance in the experiment is the current that the op-amp can sustain, which, for this specific operational amplifier, should be kept below 5mA. One may achieve larger negative capacitance by using higher current opamps. The short circuit frequency response with the negative capacitance is also shown in Fig.

Although the result is promising, it might not be easy to implement, because such approach usually requires pre-conditioning or design modification of the mechanical structure. Open-Loop Comparison and Enhancement 31 The generalized electro-mechanical coupling coefficient, actually, can be increased by electrical tailoring, that is, by introducing a negative capacitance. By connecting a negative capacitance in series with the piezoelectric material, the overall effective capacitance of the circuit is increased, resulting in a larger electro-mechanical coupling coefficient.

This configuration has the same passive damping ability as configuration (b), as 24 Adaptive Structural Systems with Piezoelectric Transducer Circuitry both of them degenerate to the parallel passive shunt (Wu, 1996) with the absence of active driving source. 2 Optimal Passive Damping Comparison In both the serial and the parallel circuitry configurations, a second order dynamics is augmented to the original system, and the optimal values for the inductance and resistance can be found based upon the analogy with the damped vibration absorber concept.

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Adaptive Structural Systems with Piezoelectric Transducer Circuitry by Kon-Well Wang, Jiong Tang

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