scholarly journals Susceptibility of personal computer systems to electromagnetic pulses with double exponential character

2005 ◽  
Vol 2 ◽  
pp. 63-69 ◽  
Author(s):  
M. Camp ◽  
H. Garbe
Keyword(s):  
Personal Computer ◽  
Pulse Shape ◽  
Computer Systems ◽  
Electromagnetic Pulses ◽  
Transient Electromagnetic ◽  
Double Exponential ◽  
Exponential Character ◽  
Fast Transient ◽  
Exponential Pulse ◽  
Computer Generation

Abstract. In this paper the susceptibility of personal computer systems to fast transient electromagnetic pulses with double exponential pulse shapes (EMP, UWB) is determined. The influence of the computer generation, RAM-values, different program states and the pulse shape, as well as the destruction thresholds of single PC-components (CPU, RAM, BIOS, Mainboard) have been investigated.

Simulation of Transient EMP Effects Coupling through Apertures Using Sub-Gridding FDTD Algorithm

2012 ◽  
Vol 195-196 ◽  
pp. 814-820 ◽  
Author(s):  
Jin Shi Xiao ◽  
Xiong Wei Ren
Keyword(s):  
Field Strength ◽  
Current Density ◽  
Electromagnetic Pulse ◽  
Pulse Source ◽  
Coupling Effects ◽  
Transient Electromagnetic ◽  
Double Exponential ◽  
Gauss Pulse ◽  
Em Field ◽  
Exponential Pulse

Transient electromagnetic pulse (EMP) can easily couple into the inner of targets via apertures. To calculate the EMP coupling effects on a cylinder object with openings, the coupling course is simulated using sub-gridding FDTD algorithm in this paper. Gauss pulse and double exponential pulse are selected as the incident pulse source. The coupling EM field strength E inside the object and the current density J on the surface are calculated. Several rules about EMP coupling effects are gotten both in time and frequency domain. The results can help us to understand the damage effects of transient EMP.

scholarly journals Shielding of Electronic Systems against Transient Electromagnetic Interferences

2005 ◽  
Vol 3 ◽  
pp. 131-135 ◽  
Author(s):  
H. Herlemann ◽  
S. Korte ◽  
M. Camp ◽  
H. Garbe ◽  
M. Koch ◽  
...  
Keyword(s):  
Electronic Device ◽  
Electronic Systems ◽  
Reliable Measure ◽  
Electrically Conductive ◽  
Electromagnetic Pulses ◽  
Transient Electromagnetic ◽  
Double Exponential ◽  
The Subject ◽  
Conductive Textile

Abstract. In order to protect electronic systems against the effects of transient electromagnetic interferences, shields made of electrically conductive material can be used. The subject of this paper is an electrically conductive textile. When applying the shield, a reliable measure is needed in order to determine the effectiveness of the shield to protect against electromagnetic pulses. For this purpose, a time domain measurement technique is presented using double exponential pulses. With these pulses, the susceptibility of an operating electronic device with and without the shield is determined. As a criterion of quality of a shield, the breakdown failure rate found in both cases is compared.

scholarly journals The Parameter Estimation of Double Exponential Pulse Based on a Least Infinity Norm Fitting Method

2021 ◽  
Vol 2083 (4) ◽  
pp. 042002
Author(s):  
Yuewu Shi ◽  
Wei Wang ◽  
Zhizhen Zhu ◽  
Xin Nie
Keyword(s):  
Estimation Error ◽  
Estimation Method ◽  
Maximum Amplitude ◽  
Least Square Method ◽  
Least Square ◽  
Physical Parameters ◽  
Infinity Norm ◽  
Fitting Method ◽  
Double Exponential ◽  
Exponential Pulse

Abstract This paper presents an estimation method of double exponential pulse (DEP) between the physical parameters rise time (t r), full width at half maximum amplitude (t FWHM) and the mathematical parameters α, β. A newly fitting method based on the least infinity norm criterion is proposed to deal with the estimation problem of DEP. The calculation process and equation of parameters of this method is proposed based on an m-th-order polynomial fitting model. This estimation method is compared with the least square method by the same data and fitting function. The results show that the maximum estimation error of parameters of double exponential pulse obtained by the least infinity norm method is 1.5 %.

Experiments and Analyses of Horizontal Earth Electrodes’ TGR on Various Grounds

2014 ◽  
Vol 599-601 ◽  
pp. 935-939
Author(s):  
Xin Bo Qu ◽  
Bi Hua Zhou ◽  
Ya Peng Fu ◽  
Yan Xin Li ◽  
Tao Wang
Keyword(s):  
Time Domain ◽  
Pulse Current ◽  
Grounding Resistance ◽  
Ground Measurement ◽  
Double Exponential ◽  
New Type ◽  
Exponential Pulse ◽  
Discharging Capacity ◽  
Horizontal Grid ◽  
Earth Electrode

In this paper, a new type of portable horizontal grid earth electrode has been designed for mobile equipments. With the impulse ground measurement system, the responses to double exponential pulse current of five earth electrodes in two arrangements have been tested on soil, grassplot and cement floor respectively. After filtering and calculating, the curve of transient grounding resistance (TGR) in time domain can be gotten. And in the end, some conclusions have been drawn. The analysis of discharging capacity of horizontal grid earth electrodes in time domain has great significance in the design of mobile equipments’ earth devices.

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