Delocalization and Vibration Control of Nearly Periodic Structures Using Piezoelectric Networks
Delocalization and Vibration Control of Nearly Periodic Structures Using Piezoelectric Networks

Author:

Publisher:

Published: 2004

Total Pages: 0

ISBN-13:

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In this investigation, novel piezoelectric networks have been developed to create additional coupling channels among the substructures and destroy vibration localization. It was found that with proper selection of circuitry elements, the level of vibration localization the nearly periodic structure could be reduced. Parametric studies were carried out to explore the underlining mechanism for delocalization approach. The robustness of the proposed delocalization scheme was also examined, where analysis showed that circuitry imperfections have little effect on the system performance. Through working with the Wright Patterson Research Lab, non-dimensional generic study has been extended to investigate the feasibility of utilizing such a technology on turbo-machinery structures. It was shown that one can achieve the delocalization effect with very reasonable system parameters. Multi-harmonic vibration suppress ion under external forcing scenario has been investigated. A new algorithm was synthesized to analytically decide the piezoelectric damped absorber parameters. It was shown that, with capacitance networking and electrical coupling, this approach can suppress all the spatial harmonics, which cannot be achieved by traditional piezoelectric shunts. At the end of this research program, based on the findings and experience obtained from the study, several challenging issues that need to be addressed in let investigations for the realization of the new idea have been identified.

Adaptive Structural Systems with Piezoelectric Transducer Circuitry
Adaptive Structural Systems with Piezoelectric Transducer Circuitry

Author: Kon-Well Wang

Publisher: Springer Science & Business Media

Published: 2009-04-03

Total Pages: 303

ISBN-13: 0387787518

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Adaptive Structural Systems with Piezoelectric Transducer Circuitry provides a comprehensive discussion on the integration of piezoelectric transducers with electrical circuitry for the development and enhancement of adaptive structural systems. Covering a wide range of interdisciplinary research, this monograph presents a paradigm of taking full advantage of the two-way electro-mechanical coupling characteristics of piezoelectric transducers for structural control and identification in adaptive structural systems. Presenting descriptions of algorithm development, theoretical analysis and experimental investigation, engineers and researchers alike will find this a valuable reference.

Piezoelectric Tailoring with Enhanced Electromechanical Coupling for Concurrent Vibration Control of Mistuned Periodic Structures
Piezoelectric Tailoring with Enhanced Electromechanical Coupling for Concurrent Vibration Control of Mistuned Periodic Structures

Author:

Publisher:

Published: 2006

Total Pages: 33

ISBN-13:

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The objective of this research is to advance the state of the art of vibration control of mistuned periodic structures utilizing the electromechanical coupling and damping characteristics of piezoelectric networking. in this investigation, an active coupling enhancement approach through negative capacitance has been developed to increase the piezolectric electromechanical coupling. Experiments were carried out to validate the delocalization concept of the piezoelectric network. it was verified that the vibration localization level in a mistuned periodic structure can be reduced by using the piezoelectric networking and further improved by the negative capacitance. The piezoelectric networking concept was further extended and investigated as an effective means for vibration suppression of mistuned bladed disks. An optimal network was analytically derived and the performance and robustness of the optimal network was analyzed numerically through Monte Carlo simulation. The analysis showed that the optimal network can effectively suppress vibration of bladed disk systems under multiple spatial harmonic excitations, and is effective for mistuned systems. The optimal network is also robust against variations in circuitry parameters. Experiments were performed to demonstrate the multiple spatial harmonic vibration suppression effect of the piezoelectric network on a coupled blade and disk system. The test results verified the analytical predictions and showed that the proposed approach is effective in suppressing multiple engine order excitations.

Applied Vibration Suppression Using Piezoelectric Materials
Applied Vibration Suppression Using Piezoelectric Materials

Author: Mehrdad R. Kermani

Publisher: Nova Publishers

Published: 2008

Total Pages: 194

ISBN-13: 9781600218965

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The aim of this book is to provide insight on the vibration problem in structurally flexible mechanisms, particularly robotic manipulators. The book covers different aspects of flexible structures. It partially includes the fundamental formulations for modelling of a flexible structure actuated with piezoelectric actuators. Mathematical modelling, when possible, as well as experimental techniques for obtaining models of flexible structures are discussed. Additionally, different control techniques adapted for flexible robotic manipulators equipped with piezoelectric actuators and sensors are covered in the book. Depending on the system, linear and non-linear control techniques for stabilising residual vibrations in the system are discussed.