Journal ArticleDOI
Judging the Abnormal Rail-Armature Contact States With Waveforms of B-Dot Probes
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In this paper, two kinds of abnormal rail-armature contact states are assumed and simulated, and the simulated B-dot probe waveforms are compared with the results from the experiments.Abstract:
In this paper, two kinds of abnormal rail-armature contact states are assumed and simulated, and the simulated B-dot probe waveforms are compared with the results from the experiments Through theoretical analysis, simulations, and experiments, relations between the abnormal contact states and the output waveforms of the B-dot probe are investigated Results show that with the help of the B-dot probe output waveforms, the transition position can be obtained and the intervals between the parallel circuit branches, which are created by the arcs arising from the abnormal contact states, can be primarily measuredread more
Citations
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Journal ArticleDOI
Modeling and simulation of muzzle flow field of railgun with metal vapor and arc
TL;DR: In this paper, a multi-component plasma transport model is used to analyze the muzzle arc plasma flow process of the mixed gas of Al vapor and the air, and the pressure boundary conditions are fitted by the dynamic mesh simulation results.
Journal ArticleDOI
Simulation and Analysis of the Railgun Muzzle Flow Field Considering the Arc Plasma
TL;DR: In this paper, an analysis of the railgun muzzle fluid flow field after the armature left the barrel is presented, and a three-dimensional numerical model for arc plasma is obtained based on the electromagnetic and hydrodynamic equations.
Journal ArticleDOI
A Novel Measurement Method of Solid Armature’s in-Bore Motion State Using B-Dot Probes for Rail Gun
TL;DR: Wang et al. as mentioned in this paper used B-dot probes to acquire the discrete time points when the armature passes by them and interpolated these points into a curve of the armatures displacement.
Journal ArticleDOI
Electrodynamic response study on railgun launcher based on electromechanical coupling model
TL;DR: In this article, the electrodynamic behavior of a medium caliber railgun was studied based on an electromechanical coupling model, which uses a unified modeling method for both electromagnetic and electromachanical field.
Proceedings ArticleDOI
Research on the instantaneous temperature rise prediction of continuous electromagnetic launch guide rail based on data-driven technology
TL;DR: In this article, a multi-variable coupled feature series neural network prediction model is constructed to predict the instantaneous temperature rise curve of the continuously launching guide rail on line, and the parameters of the model are obtained based on the emission data as training sample, and prediction of feature sequence is performed.
References
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Journal ArticleDOI
Dynamic response of electromagnetic railgun due to projectile movement
TL;DR: In this paper, a model is developed to investigate the dynamic response of an electromagnetic railgun, induced by a moving magnetic pressure during launch of projectiles, and a study is performed to show the effect of these parameters on the critical velocity of the barrel.
Journal ArticleDOI
Model of contact transitioning with "realistic" armature-rail interface
J.P. Barber,Y.A. Dreizin +1 more
TL;DR: In this article, the authors combine the two approaches to obtain a more realistic picture of the velocity skin effect and its role in transitioning of armature contacts, and they show that when realistic properties of the contact interface are taken into account, the structure of the velocities and the speed of a wave of local transitioning may significantly differ from the "ideal" theory.
Journal ArticleDOI
Effect of geometry change on the current density distribution in C-shaped armatures
TL;DR: In this paper, the authors examined if the peak current density distribution can be made more uniform by altering the armature geometry by curving surface edges and strategically adding and subtracting material from the original armature.
Journal ArticleDOI
On the origins of muzzle voltage
Y.A. Dreizin,J.P. Barber +1 more
TL;DR: For low voltage, nonarcing armatures, analysis of various contributions to muzzle voltage in railguns is presented in this article, where it is shown that there is an important contribution associated with the currents induced in the rails in front of the armature.
Journal ArticleDOI
Effect of Geometry Change on Armature Behavior
TL;DR: In this article, a saddle-shaped armature with curved trailing edge and a front tab was designed to reduce current concentration and heating at the leading edge of the contact area, thus reducing the nonuniformity of current density distribution.