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An Accurate Inverter Impedance Estimation Method
2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia), 2020Grid-connected inverters are widely used in renewable energy systems. Interaction between the grid and the inverter, however, may generate harmonic resonances that leads to reduced power quality and even instability. To analyze the stability of the inverter-grid system using impedance-based stability criterion, inverter impedance has to be known.
Junliang Liu +5 more
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Time‐domain estimation of MT Impedance tensor
GEOPHYSICS, 1994The spectral analysis of magnetotelluric (MT) data for impedance tensor estimation requires the stationarity of measured magnetic (H) and electric (E) fields. However, it is well known that noise biases timedomain tensor estimates obtained via an iterative search by a descent algorithm to determine the least‐mean‐square residual between measured and ...
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Analytical Estimation of Transit Access Impedances
Transportation Engineering Journal of ASCE, 1972Access to transit lines has a significant impact on transit ridership. Accordingly, models developed by the UTP process very often distinguish between access time and line-haul time. A systematic technique for determining access link characteristics from a zone to a single transit stop or to a given transit line is developed herein.
Paul R. Rassam, Raymond H. Ellis
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Estimation of Physiological Impedance from Neuromuscular Pulse Data
2021 43rd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), 2021A Conducted Electrical Weapon (CEW) deploys 2, or more, probes to conduct current via the body to induce motor-nerve mediated muscle contractions, but the inter-probe resistances can vary and this can affect charge delivery. For this reason, newer generation CEWs such as the TASER® X3, X2 and X26P models have feed-forward control circuits to keep the ...
Bryan D, Chiles +5 more
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Environment estimation for enhanced impedance control
Proceedings of 1995 IEEE International Conference on Robotics and Automation, 2002Impedance control is a popular method of controlling the dynamic response a robot has to external forces. The advantage of such a control paradigm is the ability to manipulate in both unconstrained and constrained environments. Unlike hybrid control methods that attempt to control forces and motions in orthogonal directions, impedance control consists ...
L.J. Love, W.J. Book
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Non-invasive estimation of vascular impedance
1996 IEEE Ultrasonics Symposium. Proceedings, 2002Vascular impedance is a quantity that characterises the properties of the vascular bed. In the large arteries, the impedance has a close relationship to the pulse wave velocity. Due to the elastic properties of an artery, the wall pulsation was used for non-invasive estimation of the pulse wave velocity.
A. Eriksson, H.W. Persson, K. Lindstrom
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Adaptive estimation of impedance cardiographic signals
Proceedings of 16th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2002An adaptive filter to estimate the deterministic component of the impedance cardiographic signal is presented. This filter removes the noise uncorrelated with the impedance cardiographic signal time-locked to the R-R interval of ECG, using the least mean square (LMS) algorithm.
A.K. Barros, M. Yoshizawa, Y. Yasuda
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Comparative Estimation of Impedance Measurement Errors
Measurement Techniques, 2002Comparing impedance measurement errors in various coordinate systems is considered. An estimator may be based on the area in the complex plane within which the coordinates are undefined on account of the errors.
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Acoustic impedance estimation using calibration curve for scanning acoustic impedance microscope
2016 International Conference on Knowledge Creation and Intelligent Computing (KCIC), 2016Ultrasonic has been used since several decades ago. One of ultrasonic application is used in medical field to observe mechanical properties of target, such as speed of sound, density, acoustic impedance, attenuation, etc. Several methods are also available to estimate mechanical property of target.
Agus Indra Gunawan +5 more
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Bioelectrical Impedance to Estimate Changes in Hydration Status
International Journal of Sports Medicine, 2002Bioelectrical impedance analysis (BIA) has been suggested as a simple, rapid method to assess changes in hydration status. BIA measures the electrical impedance to a low amperage current that is affected by both water and electrolyte content of the body.
C, O'Brien, A J, Young, M N, Sawka
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