Down-Slope Contact Transition in Railguns

Satapathy, S.; Vanicek, H.

doi:10.1109/tmag.2006.887593

Cited by 44 publications

(21 citation statements)

References 8 publications

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“…Four resistors moved the transition downstream slightly, removing all the resistors delayed transition to the end of the gun. This is a relatively clean example of downslope transition effects [12,13]. The muzzle voltage and acceleration profiles for the different launches were not markedly different so no effect on the wear, at least for the first 4.5 m, was expected.…”

Section: A Steel Rail Wear Experimentsmentioning

confidence: 68%

EM gun bore life experiments at the Naval Research Laboratory

Meger

Cairns

Douglass

et al. 2012

2012 16th International Symposium on Electromagnetic Launch Technology

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The Naval Research Laboratory (NRL) performs basic and applied research on high power railguns as part of the US Navy EM Launcher program. The understanding of damage mechanisms as a function of armature and barrel materials, launch parameters, and bore geometry is of primary interest to the development of a viable high power railgun. Research is performed on a 6m, 1.5 MJ railgun located at NRL. Barrel studies utilize in situ diagnostics coupled with detailed ex situ analysis of rail materials to provide clues to the conditions present during launch. Results are compared with coupled 3-D electromagnetic and mechanical Finite Element Analysis (FEA) models of railgun operation. Results of several experiments on rail wear will be discussed.

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Section: A Steel Rail Wear Experimentsmentioning

confidence: 68%

EM gun bore life experiments at the Naval Research Laboratory

Meger

Cairns

Douglass

et al. 2012

2012 16th International Symposium on Electromagnetic Launch Technology

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“…Wang et al [14] reported that the down-slope transition occurs when the I exit is lower than 90% of the I ref . Satapaty et al [15] made a statistical analysis based on the experiments and showed that the down-slope transition occurs when I exit is lower than 80% of the I ref . It should be noted that these studies were conducted with small and medium caliber EMLs, respectively.…”

Section: A Optimizing the Triggering Times To Obtain The Maximum Muzmentioning

confidence: 99%

Electromagnetic Launcher Speed Control with a Multilevel Fast Triggering Time Algorithm (MFTTA)

Tosun¹

2020

Preprint

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“…The statistical test data illustrate that the transition of solid armature usually occurs at the time that the pulse current drops to about 80% of peak current [9]. Table list the ratio of the pulse current at the muzzle point and the peak current (M), and the ratio of the pulse current at the transition point and the peak current (T).…”

Section: B Analysis Of the Transition Phenomenonmentioning

confidence: 99%

The experimental research on the sliding performance of solid armature under different sequential pulse current

Wang

et al. 2011

2011 International Conference on Electrical Machines and Systems

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From some experimental results of the electromagnetic rail driving system (EMRDS), it was found that the time sequence of multiple pulses current affected the sliding performance of solid armature. Therefore, how to choose the proper time sequence becomes a noticeable problem. A kind of C-shaped solid armature which has good flexibility is designed and tested at a small experimental system, in this paper, and the experimental results of the sliding performance of the armature is analyzed by the curves of the signal collecting system (SCS) and the rail condition after experiment. The experimental pulse currents include the synchronous pulse current and the sequential one. The experimental results show that at the condition of same charging energy, the muzzle velocity of solid armature under the synchronous pulse is higher than the one under the sequential pulse, that means the efficiency of the former is higher than the one of the latter; however, the solid armature can bear higher charging energy under the sequential pulse than under the synchronous one, so the former can reach the higher muzzle velocity if regardless of the magnitude of charging energy, and its sliding performance is better.

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Down-Slope Contact Transition in Railguns

Cited by 44 publications

References 8 publications

EM gun bore life experiments at the Naval Research Laboratory

EM gun bore life experiments at the Naval Research Laboratory

Electromagnetic Launcher Speed Control with a Multilevel Fast Triggering Time Algorithm (MFTTA)

The experimental research on the sliding performance of solid armature under different sequential pulse current

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