Results 251 to 260 of about 506,254 (285)

Online Monitoring of the Cable Insulation State Based on the Impulse Impedance Spectrum

IEEE Transactions on Instrumentation and Measurement
Zhirong Tang, Kai Zhou, Pengfei Meng
exaly   +2 more sources

Characterization of human joint impedance during impulsive motion

Journal of Electromyography and Kinesiology, 1993
The objective of the present work is to make use of the limited existing information on human joint impedance and to supplement and refine it synthetically, by means of simulation. A modular concept was applied to the construction of a joint model. The basic module was an individual revolute joint which was constrained by four resistive elements.
M, Batman, R, Seliktar
openaire   +2 more sources

Reflection of impulses as a method of determining acoustic impedance

The Journal of the Acoustical Society of America, 1984
An impulse technique has been developed which allows investigation of the reflection of acoustic transients at different angles from an impedance boundary. From measurements of the direct and reflected impulses, the complex surface impedance has been calculated from the ratio of the corresponding Fourier components.
A. J. Cramond, C. G. Don
openaire   +1 more source

Issues Concerning Determination of Impulse Voltage, Current, and Impedance

IEEE Electromagnetic Compatibility Magazine, 2021
The paper deals with satisfying the quasi-stationarity (or quasi-static) condition in studies of impulse quantities. The validity of the definition of voltage, current, and immittance is discussed. Examples are given regarding the electromagnetic compatibility issues when the quasi-stationarity condition is not met, thus the basic electric circuit ...
openaire   +1 more source

An impulse method of measuring normal impedance at oblique incidence

Journal of Sound and Vibration, 1979
Abstract An experimental method of determining the oblique incidence behaviour of sound absorbing materials is given. The method involves the measurement of acoustic impulses at the surface of an absorbing material and comparing the complex frequency components with those of a reference signal recorded remote from the surface.
J.C. Davies, K.A. Mulholland
openaire   +1 more source

Impulse response and radiation impedance of an annular piston

The Journal of the Acoustical Society of America, 1974
An approach is presented to evaluate the impulse response of an annular piston, which is mounted in an infinite planar rigid baffle. Since the impulse response is defined to be the time-dependent force on the ring, which results from an impulsive velocity of the ring, the impulse response and radiation impedance of the ring are a Fourier transform pair.
openaire   +2 more sources

Transient Impedance of High-Voltage Impulse Generating Systems

IEEE Transactions on Power Apparatus and Systems, 1970
The interaction between an impulse generating system and an impulse measuring system is dependent on the reflections that occur at the generator and divider ends of the measuring system lead. In this paper the impedances that cause these reflections are studied and discussed. The effects of the interactions are illustrated with sample oscillograms.
Frank Creed, Malcolm Collins
openaire   +1 more source

An impulse voltage calibrator of low output impedance

IEEE Transactions on Power Delivery, 2005
A calibrator that produces full lightning impulses and chopped lightning impulses with variable chopping time is described. The calibrator uses series-connected power metal-oxide field-effect transistors as the main impulse switch and insulated gate bipolar transistors (IGBTs) as the chopping switch, and its output impedance is low to drive a ...
openaire   +1 more source

Force-sensorless human joint impedance estimation utilizing impulsive force

Advanced Robotics, 2020
The paper is concerned with force-sensorless estimation of human joint impedance utilizing an impulsive force.
Keisuke Yagi, Yoshikazu Mori, Hiromi Mochiyama   +2 more
openaire   +1 more source

Impulse Impedance Tests on Laboratory Model Earth Electrode

2005 Asia-Pacific Conference on Applied Electromagnetics, 2006
The investigation was carried out with the purpose of obtaining more information about electric discharges in sandy media. A cylindrical setup was chosen for impulse testing of earth rods to simulate the voltage gradients in the field when lightning propagates to earth rod.
N.A. Idris, H. Ahmad, M.N. Isa
openaire   +1 more source