Results 261 to 270 of about 158,369 (273)

[Analysis of Bioelectrical Impedance for Identification].

Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi, 2018
Based on bioelectrical impedance theory and pattern recognition algorithm,we in this study measured varieties of people’s bioelectrical impedance in hands and identified different people according to their bioelectrical impedance.We designed a bioelectrical impedance collection circuit with AD5933 chip to measure the impedance in different people’s ...
Xiang, He, Yuanyuan, Qin, Mingliang, Su, Yuning, Jiang, Xin'an, Wang   +4 more
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LPV subspace identification of time-variant joint impedance

2013 6th International IEEE/EMBS Conference on Neural Engineering (NER), 2013
Goal of this study was to verify the usability of a novel linear parameter varying (LPV) identification technique for the identification of time-varying joint impedance. Quantification of neuromechanical parameters describing joint impedance improves understanding of human movement control and is of clinical relevance for diagnostics and treatment ...
Stijn van Eesbeek, Frans van der Helm, Michel Verhaegen, Erwin de Vlugt   +3 more
openaire   +1 more source

Wavelet transform for high impedance fault identification

APSCOM-97. International Conference on Advances in Power System Control, Operation and Management, 1997
This paper describes the application of a wavelet transform to a high impedance fault identification. Fault simulation is carried out with EMTP96. Results demonstrate that there is a high potential in the use of wavelets to distance relaying.
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Minimal measurement time in electrochemical impedance identification

Electrochimica Acta, 1994
Abstract In this paper the appropriate combination of identification methods and input signal excitation is given in order to get a minimal measurement time in electrochemical impednace spectroscopy. It is shown that all the usual methods give the same estimation with the lowest error bound when a periodic signal is used as the input excitation ...
openaire   +1 more source

Grid Impedance Identification Using the VSC Switching Ripple

2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019
This article presents a method for estimating the grid impedance with application to islanding detection and online tuning of a current controller that regulates the grid current in a grid-tied inverter with LCL filter. The presented solution requires a low computational effort when implemented in a converter that is commanded by a finite control set ...
Diego Perez-Estevez, Jesus Doval-Gandoy
openaire   +1 more source

Accuracy of human joint impedance identification

2019
Human joint impedance represents the dynamical relationship between the torque and the angle of a joint of the human muscoskeletal system. The identification of human joint impedance of the lower limbs’ joints can provide important information for the design and control of wearable bionic devices that can assist the user in performing daily tasks ...
Cavallo, Gaia, Lataire, John
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CRACK IDENTIFICATION IN BEAM STRUCTURES USING MECHANICAL IMPEDANCE

Journal of Sound and Vibration, 2002
Abstract The influence of a transverse open crack on the mechanical impedance of cracked beams under various boundary conditions is investigated both analytically and experimentally. It is shown that the driving-point impedance changes substantially due to the presence of the crack and the changes depend on the location and the size of the crack and ...
Y. BAMNIOS, E. DOUKA, A. TROCHIDIS
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Harmonic network impedance identification with pulse response analysis

2013 3rd International Conference on Electric Power and Energy Conversion Systems, 2013
The network impedance at a point of common coupling (PCC) of public mains is an essential parameter for design and control of power electronic systems connected to the PCC. Identifying its spectral characteristic is challenging, because it requires a measureable excitation of the network in the desired frequency range. Further on, the network impedance
Michael Jordan, Trung Do Thanh, Hauke Langkowski, Detlef Schulz   +3 more
openaire   +1 more source

Identification of airway characteristics using the input impedance

Journal of Mechanical Science and Technology, 2008
To understand how the input impedance determined at the throat correlates with changes in the dynamic characteristics of the airways, a simplified 5-lobe model is developed and simulated. The model takes into account some realistic conditions such as varying cross-sectional areas, flexible wall properties and branching. The lobe terminal impedances are
S. H. Cheong, S. H. Ro, J. Y. Shon, A. M. Al-Jumaily   +3 more
openaire   +1 more source

Identification of the Mechanical Impedance of Human Fingers

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 Transients were applied to the outstretched human index finger to determine its mechanical impedance. A second order linear model was fit to the force and displacement data for flexion-extension of the metacarpophalangeal joint.
Aram Z. Hajian, Robert D. Howe
openaire   +1 more source