NDLI: Magnetic field shielding of electromagnetic launch missile

Content Provider	IEEE Xplore Digital Library
Author	Shumei Cui Shaofei Wang Weiduo Zhao
Copyright Year	2013
Description	Author affiliation: Harbin Inst. of Technol., Harbin, China (Shumei Cui; Shaofei Wang; Weiduo Zhao)
Abstract	Over the past three decades, electromagnetic launch technology has made significant progress. Some researchers have begun to study the missile which is accelerated by a railgun to supersonic speed. Compared to conventional missile, an electromagnetic launch missile has the advantages of high muzzle velocity and strong concealment. However, a railgun represents a harsh electromagnetic environment for the missile. Pulse current in the railgun can produce a high amplitude and broad spectrum magnetic field. Electromagnetic interference might affect any sensitive electrical devices that the missile is being equipped with. For this reason, it is necessary to study the missile magnetic field shield in rail launcher environment. This paper has built 3D model of the railgun and missile. Using finite-element analysis, we study separately missile inner magnetic field distribution under various shielding configurations, including monolayer shield-multilayer shield and the shield body with having hole. The shielding effectiveness (SE) of various shielding configurations is presented. Based on the above results, we design a kind of double layer shielding for missile in railgun. And this paper investigates the impact of the drilling point the hole size and the opening directions in shielding performance. In addition, we found that the electromagnetic force on the armature, namely, inductance gradient becomes large because of magnetic field shielding of missile. The relation between inductance gradient and shield has been analyzed. Study shows that inductance gradient is increased by 20%.
Starting Page	1
Ending Page	1
File Size	106012
Page Count	1
File Format	PDF
ISBN	9781467351713
ISSN	07309244
DOI	10.1109/PLASMA.2013.6633274
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Missiles Magnetic fields Railguns Electromagnetics Inductance Acceleration Electromagnetic interference
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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