Results 241 to 250 of about 28,947 (291)

Part Authentication Using Indirect Electromechanical Impedance Measurements

ASME 2020 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, 2020
Abstract Motivated by its success as a structural health monitoring solution, electromechanical impedance measurements have been utilized as a means for non-destructive evaluation of conventionally and additively manufactured parts. In this process, piezoelectric transducers are either directly embedded in the part under test or bonded ...
Mohammad I. Albakri, Pablo A. Tarazaga
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Electromechanically tunable filter with impedance step

2005 15th International Crimean Conference Microwave & Telecommunication Technology, 2005
New principle of microstrip resonator and filter tuning is developed and studied. Realized idea is the operation by substrate effective dielectric constant (epsiveff) piezo-controlling. Narrow air gap (Delta) is created between substrate and ground electrode, and the piezoelectric plate controls its size.
D. Shmygin, V. Pashkov, Y. Poplavko, A. Yeremenko, M. Jeong, S. Baik   +5 more
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Electromechanical Impedance Based Part Identification via Linear Projection

ASME 2023 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, 2023
Abstract The geographical separation between various supply chain participants creates challenges in ensuring the integrity of the parts under circulation. These supply chains have to regularly deal with counterfeiting, a significant problem with an estimated value equivalent to at least the tenth-largest global economy.
Sourabh Sangle, Pablo Tarazaga
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Electromechanical realization of impedance matrices

The Journal of the Acoustical Society of America, 2001
Applications exist at both small and large length scales for which one wishes to design an electromechanical system that reproduces a desired impedance matrix. Such a matrix corresponds to one or more degrees of freedom at several attachment points. The design of MEMS filters for signal processing applications is a small length scale example. At a much
Pierre E. Dupont, Wenyuan Chen
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Electromechanical Impedance Modeling for Structural Health Monitoring

Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems; Structural Health Monitoring, 2012
Electromechanical impedance (EMI) method is an effective and powerful technique in structural health monitoring (SHM) which couples the mechanical impedance of host structure with the electrical impedance measured at the piezoelectric wafer active sensor (PWAS) transducer terminals.
Zhao, Liuxian, Gresil, Mattieu, Guo, Siming, Yu, Lingyu, Sutton, Michael   +4 more
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Electromechanical Impedance Data Fusion for Damage Detection

2021
In this paper results of application of electromechanical impedance (EMI) method for damage assessment in composite panel is presented. Artificial damage simulated by additional mass and real impact damage are investigated. Large number of measurements is analyzed and possibility of utilization of machine learning approach for clustering the damage ...
Tomasz Wandowski, Pawel Malinowski
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An electromechanical impedance-instrumented corrosion-measuring probe

Journal of Intelligent Material Systems and Structures, 2019
Corrosion of metallic structures widely existed in multiple industries, such as oil and gas, civil infrastructure, aerospace, mechanical, mining, and processing. Current available corrosion-monitoring methods are based on different sensing principles, which have their own advantages, and some drawbacks that may limit their application on some aspects.
Weijie Li, Tiejun Liu, Shasha Gao, Mingzhang Luo, Jianjun Wang, Jianchao Wu   +5 more
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Impedance tuning of an electromechanical acoustic liner

The Journal of the Acoustical Society of America, 2001
The results of a theoretical and experimental study of the impedance tuning capabilities of an electromechanical acoustic liner are presented. An electromechanical acoustic liner utilizes an array of Helmholtz resonators, each containing an electroactive, compliant-walled cavity, to couple the electrical, mechanical and acoustical energy domains.
Stephen B. Horowitz, Toshikazu Nishida, Louis N. Cattafesta, Mark Sheplak   +3 more
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Electromechanical impedance modeling of active material systems

SPIE Proceedings, 1994
An active material system may be generalized as an electro-mechanical network because of the incorporation of the actuators (electrically driven) and sensors (that convert mechanical energy into electrical energy). This paper summarizes most of our research in the area of the electro- mechanical impedance (EMI) modeling of active material systems.
Chen Liang, Fanping P. Sun, Craig A. Rogers   +2 more
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A Novel Variable Mechanical-Impedance Electromechanical Actuator

Dynamic Systems and Control: Volume 1 — Control Theory/Methodology; Robust Control; Applied Nonlinear Control Systems; QFT Designs in Industrial, Government, Academic Settings; Robot Control; Impedance Planning for Robotics; Haptic Interfaces for Virtual Environment/Teleoperator Systems; Intelligent Control Systems; Intelligent Process Control; Neural Networks, 1994
Abstract A variable mechanical-impedance, electromechanical actuator is a mechatronic device for which the mechanical impedance is modulated by a non-energetic, command signal. Such actuators can be thought of as programmable springs and dampers: within an achievable impedance range, the stiffness, equilibrium angle, and damping can ...
Ernest D. Fasse, Neville Hogan, Steve R. Gomez, Neil R. Mehta   +3 more
openaire   +1 more source