Design and experimental analysis of magnetic shielding of electronic-magnetic rail gun ammunition fuse

Shen, Na; Zhang, Xiangjin; Liao, Qiaosheng; Zhang, Miao

doi:10.3233/jae-160060

Cited by 3 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Taking into account the relationship between the magnetic field diffusion and input current, it is important to note that the input current directly affects the simulation results. The commonly used input current is equivalent to a Bi-exponential [ 28 ] or a three-segment function [ 29 ] based on test results, as illustrated in Figure 15 . The total duration is set to 12 ms and the peak current value reaches 3.15 MA.…”

Section: Resultsmentioning

confidence: 99%

Simulation and Experimental Verification of Magnetic Field Diffusion at the Launch Load during Electromagnetic Launch

Yang,

Yin,

et al. 2023

Sensors

View full text Add to dashboard Cite

The unique magnetic field environment during electromagnetic launch imposes higher requirements on the design and protection of the internal electronic system within the launch load. This low-frequency, Tesla-level extreme magnetic field environment is fundamentally distinct from the Earth’s geomagnetic field. The excessive change rate of magnetic flux can readily induce voltage within the circuit, thus disrupting the normal operation of intelligent microchips. Existing simulation methods primarily focus on the physical environments of rails and armatures, making it challenging to precisely compute the magnetic field environment at the load’s location. In this paper, we propose a computational rail model based on the magneto–mechanical coupling model of a railgun. This model accounts for the dynamic current distribution during the launch process and simulates the magnetic flux density distribution at the load location. To validate the model’s accuracy, three-axis magnetic sensors were placed in front of the armature, and the dynamic magnetic field distribution during the launch process was obtained using the projectile-borne-storage testing method. The results indicate that compared to the previous literature methods, the approach proposed in this paper achieves higher accuracy and is closer to experimental results, providing valuable support for the design and optimization of the launch load.

show abstract

Section: Resultsmentioning

confidence: 99%

Simulation and Experimental Verification of Magnetic Field Diffusion at the Launch Load during Electromagnetic Launch

Yang,

Yin,

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…The projectile is mainly composed of various alloy materials with different performances in pulsed high magnetic fields [13]. Shen [14] explored the shielding effect of a projectile material on a stable magnetic field, but did not use a projectile suitable for an electromagnetic launch. Becherini [15] studied the effectiveness of shielding packages with different shapes in a pulsed high magnetic field.…”

Section: Introductionmentioning

confidence: 99%

The Influence of projectile shielding on the internal magnetic field during an electromagnetic launch

Yang¹,

Liu²,

Li³

et al. 2022

J. vibroeng.

View full text Add to dashboard Cite

Compared with a conventional propulsion system, an electromagnetic railgun is characterized by an in-bore pulsed high magnetic field. However, the dynamic distribution of the magnetic field in the projectile has rarely been experimentally studied. To this end, this paper discusses the possibility of utilizing magnetic field environment information. An equivalent model of an electromagnetic railgun is established by using the finite element method. Based on the magnetic diffusion equation and the Biot-Savart law, the in-bore magnetic induction is determined. The velocity skin effect and projectile shielding are considered in the model. Furthermore, the magnetic measurement method is presented to validate a simulation result. The results obtained from the simulation and experiment show that package shielding affects the pulse width and amplitude of the internal value. The peak magnetic induction of low carbon steel and copper is reduced by 33.6 %, and the pulse width lags by 2.7 ms. Moreover, projectile shielding has a substantial influence on the timing accuracy during launch, and the time error reaches approximately 18 %. Therefore, the in-bore magnetic field is a practical signal for the control module since it considers the influence of different projectile shields.

show abstract

Investigation of the influence mechanism of shield on the strong magnetic field during electromagnetic launch

Yang,

Liu,

et al. 2024

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

Design and experimental analysis of magnetic shielding of electronic-magnetic rail gun ammunition fuse

Cited by 3 publications

References 10 publications

Simulation and Experimental Verification of Magnetic Field Diffusion at the Launch Load during Electromagnetic Launch

Simulation and Experimental Verification of Magnetic Field Diffusion at the Launch Load during Electromagnetic Launch

The Influence of projectile shielding on the internal magnetic field during an electromagnetic launch

Investigation of the influence mechanism of shield on the strong magnetic field during electromagnetic launch

Contact Info

Product

Resources

About