Results 21 to 30 of about 28,947 (291)
Applied Sciences, 2023 Up to date, biomimicry has aided in designing novel ideas and solving various problems in the field of civil engineering. For example, the concept of a load carrying process from a tree can be used to design an effective bridge.
Yi-Seul Kim, Wongi S. Na
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Study of transient synchrophasors for the development of relay protection and control systems [PDF]
E3S Web of Conferences, 2023 The paper discusses issues of improving control and relay protection systems based on the study and analysis of voltage and current synchrophasors of electromechanical and electromagnetic transient processes.
Mokeev Alexey, Piskunov Sergey
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Multi-layered piezoelectric composite transducers [PDF]
, 2003 Multilayered piezoelectric materials present themselves as a suitable technology for the development of sub 100kHz transducers. A variety of different configurations have been proposed, including stacked 2-2, 1-3 and 3-1 connectivity configurations ...
Hayward, G., O'Leary, R.L., Parr, A.C.S.
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Superconducting re-entrant cavity transducer for a resonant bar gravitational radiation antenna [PDF]
, 1992 Copyright @ American Institute of PhysicsA 10‐GHz superconducting niobium re‐entrant cavity parametric transducer was developed for use in a cryogenic 1.5‐tonne Nb resonant bar gravitational radiation antenna. The transducer has a very high electrical Q (
Braginsky V. B. +2 more
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Monolithic ultrasound fingerprint sensor. [PDF]
, 2017 This paper presents a 591×438-DPI ultrasonic fingerprint sensor. The sensor is based on a piezoelectric micromachined ultrasonic transducer (PMUT) array that is bonded at wafer-level to complementary metal oxide semiconductor (CMOS) signal processing ...
Boser, Bernhard E +7 more
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Probabilistic Approach for Electromechanical Impedance-Based SHM Models
OBSERVATÓRIO DE LA ECONOMÍA LATINOAMERICANA, 2023 Applying structural health monitoring techniques has become very important in engineering and aeronautics. The technique based on electromechanical impedance is one of them. In this work, the electromechanical impedance-based SHM technique is applied to determine the existence of damage in an aluminum beam using the Root Square Deviation (RMSD) damage ...
Gislene da Silva Fonseca +4 more
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Shock and Vibration, 2014 Impedance-based structural health monitoring technique is performed by measuring the variation of the electromechanical impedance of the structure caused by the presence of damage.
Lizeth Vargas Palomino +2 more
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Shock and Vibration, 2012 Structural Health Monitoring (SHM) is the process of damage identification in mechanical structures that encompasses four main phases: damage detection, damage localization, damage extent evaluation and prognosis of residual life.
L.V. Palomino +5 more
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Sensors, 2017 The emergence of composite materials has revolutionized the approach to building engineering structures. With the number of applications for composites increasing every day, maintaining structural integrity is of utmost importance.
Wongi S. Na, Jongdae Baek
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Piezoelectric Electro-Mechanical Impedance (EMI) Based Structural Crack Monitoring
Applied Sciences, 2020 To detect small cracks in plate like structures, the high frequency characteristics of local dynamics were studied with the piezoelectric electro-mechanical impedance (EMI) method, and damages were monitored by the changes of the EMI.
Tao Wang +4 more
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