Research on the Sliding Electrical Contact of the Rapid Fire Railgun

Xu, Weidong; Yuan, Wu; Sun, Yaohong; Yan, Ping; Li, Jun

doi:10.1109/tps.2013.2252190

Cited by 18 publications

(2 citation statements)

References 7 publications

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“…However, these techniques are too expensive and their measurement results may also be affected by electrical noises and vibrations [6]. Therefore, in recent years, researchers have started to develop new methods to detect the key projectile position inside the barrel with high reliability [7][8][9]. It is difficult to detect the projectile position because of aluminum vapor attachment and smoke in the barrel during launching.…”

Section: Measurement Science and Technologymentioning

confidence: 99%

Non-contact and contact measurement system for detecting projectile position in electromagnetic launch bore

Xu¹,

Yuan²,

Xu³

et al. 2017

Meas. Sci. Technol.

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This paper introduces a new measurement system for measuring the position of a projectile within a rapid fire electromagnetic launching system. The measurement system contains both non-contact laser shading and metal fiber contact measurement devices. Two projectiles are placed in the rapid fire electromagnetic launch bore, one in the main accelerating segment and the other in the pre-loading segment. The projectile placed in the main accelerating segment should be shot first, and then the other is loaded into the main segment from the pre-loading segment. The main driving current (I-main) can only be discharged again when the second projectile has arrived at the key position (the projectile position corresponds to the discharging time) in the main accelerating segment. So, it is important to be able to detect when the second projectile arrives at the key position in the main accelerating segment. The B-dot probe is the most widely used system for detecting the position of the projectile in the electromagnetic launch bore. However, the B-dot signal is affected by the driving current amplitude and the projectile velocity. There is no current in the main accelerating segment when the second projectile moves into this segment in rapid fire mode, so the B-dot signal for detecting the key position is invalid. Due to the presence of a high-intensity magnetic field, a high current, a high-temperature aluminum attachment, smoke and strong vibrations, it is very difficult to detect the projectile position in the bore accurately. So, other measurements need to be researched and developed in order to achieve high reliability. A measurement system based on a laser (non-contact) and metal fibers (contact) has been designed, and the integrated output signal based on this detector is described in the following paper.

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Section: Measurement Science and Technologymentioning

confidence: 99%

Non-contact and contact measurement system for detecting projectile position in electromagnetic launch bore

Xu¹,

Yuan²,

Xu³

et al. 2017

Meas. Sci. Technol.

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“…During the launching process, the extreme environment of high electrical current density, high mechanical shock, high temperature rise, and strong strain pose great challenges to the material of the A&R and its contact stability. Because of the interaction within the A&R, a series of complex surface behaviors occur on the surface of the A&R, such as Joule heating, arc electrical behavior [6][7][8], and changes in contact status (solid-arc-solid, solid-liquid-solid, and solid-solid contact). Several types of damage can occur on the A&R surface (friction and wear, deposition, gouge, grooving, transition, the arc ablation of the rail, and melting of the armature) [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Research Progress on Surface Damage and Protection Strategies of Armature–Rail Friction Pair Materials for Electromagnetic Rail Launch

Wang,

Yao,

Zhou

et al. 2024

Materials

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Electromagnetic rail launch technology has attracted increasing attention owing to its advantages in terms of range, firepower, and speed. However, due to electricity-magnetism-heat-force coupling, the surface of the armature–rail friction pair becomes severely damaged, which restricts the development of this technology. A series of studies have been conducted to reduce the damage of the armature–rail friction pair, including an analysis of the damage mechanism and protection strategies. In this study, various types of surface damage were classified into mechanical, electrical, and coupling damages according to their causes. This damage is caused by factors such as mechanical friction, mechanical impact, and electric erosion, either individually or in combination. Then, a detailed investigation of protection strategies for reducing damage is introduced, including material improvement through the use of novel combined deformation and heat treatment processes to achieve high strength and high conductivity, as well as surface treatment technologies such as structural coatings for wear resistance and functional coatings for ablation and melting resistance. Finally, future development prospects of armature–rail friction pair materials are discussed. This study provides a theoretical basis and directions for the development of high-performance materials for the armature–rail friction pair.

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Research Progress on the Optimization of the Inner Bore Cross-Section Shape of the Railgun

Xiao¹,

Li²,

Yuan³

et al. 2023

Lecture Notes in Electrical Engineering

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Research on the Sliding Electrical Contact of the Rapid Fire Railgun

Cited by 18 publications

References 7 publications

Non-contact and contact measurement system for detecting projectile position in electromagnetic launch bore

Non-contact and contact measurement system for detecting projectile position in electromagnetic launch bore

Research Progress on Surface Damage and Protection Strategies of Armature–Rail Friction Pair Materials for Electromagnetic Rail Launch

Research Progress on the Optimization of the Inner Bore Cross-Section Shape of the Railgun

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