Results 201 to 210 of about 5,593 (250)

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
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +1 more source

Electromechanical Impedance Method to Assess the Stability of Dental Implants

Structural Health Monitoring 2017, 2017
In this paper we illustrate the application of the electromechanical impedance (EMI) technique, popular in structural health monitoring, to assess the stability of dental implants. The technique consists of bonding a piezoelectric transducer to the element to be monitored.
Rizzo, P., La Malfa Ribolla, E.
openaire   +1 more source

Characterisation of CFRP adhesive bonds by electromechanical impedance

SPIE Proceedings, 2014
In aircraft industry the Carbon Fiber Reinforced Polymer (CFRP) elements are joint using rivets and adhesive bonding. The reliability of the bonding limits the use of adhesive bonding for primary aircraft structures, therefore it is important to assess the bond quality.
Pawel H. Malinowski, Tomasz Wandowski, Wieslaw M. Ostachowicz   +2 more
openaire   +1 more source

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

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
openaire   +1 more source

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
openaire   +1 more source

Aging of Solid Propellants Investigated by Electromechanical Impedance Technique

Journal of Propulsion and Power, 2021
Aging induced changes in the mechanical properties of solid propellant can lead to defects, such as cracks and grain–liner separations, which limit the service lifetime of solid rocket motors.
Shoucheng Zhang, Li Xiao, Wenzhong Qu
openaire   +1 more source

Electromechanical impedance: Analogs and duality

Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics, 1959
It is felt that 4-terminal network theory is potentially of great value in the analysis of problems in the non-electrical realm and problems which are only partially electrical. In attempting to apply 2-port theory however,1,2 some perplexing difficulties arise.
openaire   +1 more source