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Electromechanical impedance modeling of active material systems
SPIE Proceedings, 1994An 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 +2 more
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Modeling the electromechanical impedance technique for the assessment of dental implant stability
Journal of Biomechanics, 2015We simulated the electromechanical impedance (EMI) technique to assess the stability of dental implants. The technique consists of bonding a piezoelectric transducer to the element to be monitored. When subjected to an electric field, the transducer induces structural excitations which, in turn, affect the transducer's electrical admittance.
La Malfa Ribolla, Emma +1 more
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CURING MONITORING OF COMPOSITE PATCH USING ELECTROMECHANICAL IMPEDANCE
Proceedings of the 14th International Workshop on Structural Health Monitoring, 2023The repair technology of surface-bonded composite patches has garnered significant attention in the engineering field. The quality of the repair is directly impacted by the curing degree of the patch. Thus, monitoring the curing process of the patches is necessary.
JINSHAN WEN +3 more
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Variable impedance due to electromechanical coupling in electroactive polymer actuators
2011 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2011This paper presents a variable impedance suspension system based on electroactive polymer (EAP) actuators, leveraging their inherent compliance and damping, light weight, and low power requirements. We describe the manufacturing process used to create a small, lightweight EAP suspension and a novel control circuit used to vary its properties.
Sanjay Dastoor, Mark R. Cutkosky
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Multichannel Electromechanical Impedance Structural Diagnostics in Plate Specimens
Volume 5: Dynamics, Vibration, and Control, 2022Abstract Structural health monitoring has become increasingly important in order to save costs and improve the safety of structures. One of the methods of monitoring the health of structures is the use of thin piezoelectric wafer active sensors to measure the electromechanical impedance of the integrated structure/sensor system.
Funmilola Nwokocha +2 more
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Three-Dimensional Electromechanical Impedance Model. I: Formulation of Directional Sum Impedance
Journal of Aerospace Engineering, 2007Piezoceramic transducers (PZTs) are extensively used in vibration and noise control, and damage detection of various engineering structures. In the last decade, its application has been extended to include their interactions with the host structure in electromechanical impedance models.
Venu Gopal Madhav Annamdas +1 more
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Part Authentication Using Indirect Electromechanical Impedance Measurements
ASME 2020 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, 2020Abstract 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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Monitoring the wear of turning tools with the electromechanical impedance technique
Journal of Intelligent Material Systems and Structures, 2022In this study, Inconel 718 and Ti6Al4V alloys were machined using ceramic (WG 300), and carbide (G20M Grade) inserts, respectively. The focused application was grooving. The tool wear was observed with traditional methods and with a new approach, the electromechanical impedance (EMI) technique.
Fatih Hayati Çakir +2 more
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Electromechanical impedance for SHM of aircraft bolted joints
SPIE Proceedings, 2013Some problems of the electromechanical impedance (EMI), especially its applications for structural health monitoring of aircraft bolt-joints and innovated approach of EMI prediction at loosening of bolt-joints are objectives of research. The full-scale test was performed using the Mi-8 helicopter tail beam.
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Extracting local resonances using the electromechanical impedance method
ASNT Research Symposium 2023 Proceedings, 2023Local resonances, formed by zero-group velocity (ZGV) and cutoff frequency points, have been extensively studied using impulse induced by pulsed lasers and impacts. In this work, we demonstrated the effectiveness of the electromechanical impedance (EMI) technique in extracting ZGV and cutoff frequency resonance in a rectangular aluminum bar.
Keping Zhang, Yuning Wu, Xuan Zhu
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