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Zhu Y.,PLA University of Science and Technology | Zhu Y.,Institute of Engineer Technical Equipment | Luo G.,Institute of Engineer Technical Equipment | Li H.,Institute of Engineer Technical Equipment | And 2 more authors.
Applied Mechanics and Materials | Year: 2011

The circuit that a high-voltage pulse is sharpened by an opening switch and a closing switch is designed. The electric exploding wire switch (EEOS) is adopted as the opening switch to steepen pulse primarily. When the EEOS explodes, the voltage passes through the gas switch which is used as the closing switch, and then is sharpened to high-voltage pulse on the terminal load. This high-voltage and high-current circuit is simulated by steps with the software PSPICE. The experimental results show that the rising time of the pulse steepened twice is nearly 1ns, and the peak voltage is greater than 200kV on condition that the preliminary voltage is 35kV. The results obtained from the simulation and the experiment are identical on the whole. As a result, this circuit has great prospects in the pulse mediation system. © (2011) Trans Tech Publications, Switzerland.


Zhu Y.-C.,PLA University of Science and Technology | Zhu Y.-C.,Institute of Engineer Technical Equipment | Luo G.-X.,Institute of Engineer Technical Equipment | Fang X.,PLA University of Science and Technology | And 2 more authors.
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2012

The radioactive near field emitted by a small-size EMP radiator was analyzed by the finite-difference time-domain algorithm. The principle of the convolutional perfectly matched layer (CPML) was demonstrated, and both the CPML and the modified perfectly matched layer (MPML) absorbing boundary conditions were used in simulation. The result shows that the CPML can absorb the propagating modes, but also be highly effective at absorbing low-frequency evanescent modes. Its application prospect is displayed in simulating the EMP radiator. © copyright.


Zhu Y.-C.,PLA University of Science and Technology | Zhu Y.-C.,Institute of Engineer Technical Equipment | Luo G.-X.,Institute of Engineer Technical Equipment | Fang X.,PLA University of Science and Technology | Chen Y.,Institute of Engineer Technical Equipment
Baozha Yu Chongji/Explosion and Shock Waves | Year: 2011

According to the relation between the metal conductor's specific action and resistivity and the analytical formula for the variation of the exploding wire with time brought forward by Hobson, two computational models were developed to explore the electrical characteristics of an electric exploding copper wire opening switch (EEOS) by using the software Pspice. And the voltage across the EEOS was experimentally obtained. The experimental results indicate that the Hobson model is effective only before the vaporization of the electric exploding copper wire; that the specific action-resistivity model can be used to macroscopically describe the whole electric exploding process. So these two models can be used to simulate the high-voltage and high-current circuits with the EEOSs, and the simulated results are helpful for the design of the EEOSs.


Zhu Y.-C.,PLA University of Science and Technology | Zhu Y.-C.,Institute of Engineer Technical Equipment | Chen Y.,Institute of Engineer Technical Equipment | Gao C.,PLA University of Science and Technology | And 2 more authors.
Dianbo Kexue Xuebao/Chinese Journal of Radio Science | Year: 2012

The high-power pulse modulation is designed by combing electric exploding opening switch (EEOS) with gas switch with annular electrode. This circuit is designed to modulate the output of magnetic flux compression generator (MFCG). Firstly, the experiment to test the steepening effect of gas switches with electrode shapes in hemisphere, annular and flat with inverted round horn are carried out and analyzed. The high-speed breaking characteristic of EEOS is analyzed numerically and experimentally according to the relative of specific action and resistivity by software Pspice. At last, the experiment on the pulse modulation is made. The results show that when the charging voltage is 35 kV, the rising time of the pulse voltage obtained from the load is 1.68 ns, the peak value is 197 kV, and the energy is compressed by 5 times or more. The results from the simulation and experiment are roughly matched. It offers theoretical basis and experimental support for the joint experiment combing the pulse modulation circuit with the explosive magnetic flux compression generators. Copyright © 2012 by Editorial Department of Chinese Journal of Radio Science.


Yichao Z.,PLA University of Science and Technology | Yichao Z.,Institute of Engineer Technical Equipment | Shuang Q.,Institute of Engineer Technical Equipment | Genxin L.,Institute of Engineer Technical Equipment | And 2 more authors.
Proceedings - 4th International Conference on Intelligent Computation Technology and Automation, ICICTA 2011 | Year: 2011

The radioactive field emitted by a small-size electromagnetic pulse (EMP) simulator is studied. Simulation model is built on the basis of FDTD algorithm. The loads of CUSO4 solution, excitation source and absorbing boundary condition are illustrated and analyzed respectively. A new absorbing boundary condition method named convolutional perfectly matched layer (CPML) is introduced. Both the CPML and modified perfectly matched layer (MPML) are introduced as absorbing boundary condition in simulation. According to the numerical computing results, the designing plan of EMP simulator is workable. Besides, the CPML has more application in EMP simulation by comparison. © 2011 IEEE.


Zhu Y.,Jiangsu University of Science and Technology | Zhu Y.,Institute of Engineer Technical Equipment | Li H.,Institute of Engineer Technical Equipment | Luo G.-X.,Institute of Engineer Technical Equipment | Qiu S.,Institute of Engineer Technical Equipment
Proceedings 2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011 | Year: 2011

For the need of pulse modulation, an electrode of gas switch whose front shape is annular, is introduced. The fundamental principle that how static electric field around electrode is analyzed by finite element is described. The electrodes whose front shapes are hemisphere, annular and flat with inverted round horn are numerical simulated. These three electrodes' advantage and disadvantage are analyzed and discussed, and it is concluded that the annular electrode can not only ensure that the discharging passage focus on the loop, but also has certain use age. Moreover, with regard to the field strengthen factor, it is shown that this simulation method is practical and reliable by comparison. Finally, the electric performance in high-power pulse circuit is simulated with software PSPICE. The experimental results show that the data from simulation and experiment are identical generally. The gas switch with annular electrode meets the designing demand of steepening and compressing pulse and it has practical application in the high-power pulse modulation circuit. © 2011 IEEE.

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