Design Considerations for an Electromagnetic Railgun to be Used Against Antiship Missiles

Gallant, Johan; Vanderbeke, Eline; Alouahabi, Farid; Schneider, M.

doi:10.1109/tps.2013.2278779

Cited by 11 publications

(3 citation statements)

References 11 publications

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“…근접방어시스템(CIWS, close-in weapon system)은 구축 함 및 호위함에 탑재되어 해군 함정에 위협이 되는 적 항 공기, 대함 유도탄 및 소형/고속 수상함정 위협에 대응하 기 위한 근접방어무기체계이다 [1] . 이러한 CIWS는 함정계 층방어의 최종 방어수단이기 때문에, 높은 정확도를 갖는 레이다를 이용하여 목표물을 탐지하고, 해당 목표물의 정 확한 거리 및 각도를 계산하는 것이 매우 중요하다 [2] . 하 지만 포신, 레이돔, 철제 지지대 등 탑체 구조체에 의해 발생하는 물리적•전기적인 전자파 차폐 혹은 다중경로 현상은 탐지 및 추적 레이다의 각도 예측 정확도를 열화 시킨다 [3], [4] .…”

Section: ⅰ 서 론unclassified

Performance Evaluation of Radar Array Antennas Based on Complex Received Currents Using Full-Wave Simulations with Surrounding Platforms

Yu¹,

Lee²,

Park³

et al. 2021

J. Korean Inst. Electromagn. Eng. Sci.

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In this study, we propose a systematic performance evaluation process based on complex received currents for searching and tracking radars. This process incorporates an approach to simplified geometries of array antennas and cannon platforms that accurately represent the electromagnetic properties of the original geometries. The simplified geometries are used in full-wave electromagnetic simulations to compute the current magnitudes and phases induced in array antenna ports, and the values are saved as complex steering vectors. In addition, we propose a novel metric for evaluating the received performance distortions using the saved complex steering vectors, which were cross-checked with a conventional pattern distortion metric. To verify the feasibility of the proposed process, the optimal placement of array antennas for a commercial searching and tracking radar system was determined. The results demonstrate that average magnitudes and phases distortions of less than 1 mA and 3°, respectively, can be obtained when the array antennas are placed at 0.6and 1.1-m heights above the platform.

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Section: ⅰ 서 론unclassified

Performance Evaluation of Radar Array Antennas Based on Complex Received Currents Using Full-Wave Simulations with Surrounding Platforms

Yu¹,

Lee²,

Park³

et al. 2021

J. Korean Inst. Electromagn. Eng. Sci.

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“…However, we have shown that a goalkeeper is not able to defeat supersonic missiles (v = 600 m/s). A parametric analysis indicated that higher fire rates (300 Hz) are required to intercept these missiles [1]. Railguns have the potential to realize such fire rates.…”

Section: Introductionmentioning

confidence: 99%

“…2. This curve has been calculated with the model described in detail in [1] for a projectile with a muzzle velocity of 1200 m/s and a mass of 234 g. At 0 m, the gun's position, the SSHP is 100%. However, the SSHP drops to 10% at 285 m, and to only 1% at 885 m. It is, therefore, important that the projectiles strike the target as close as possible to the kill range, which can be obtained by increasing the fire rate or by varying the muzzle velocity.…”

Section: Introductionmentioning

confidence: 99%

Design Considerations for an Electromagnetic Railgun Firing Intelligent Bursts to Be Used Against Antiship Missiles

Gallant

Vancaeyzeele

Lauwens

et al. 2015

IEEE Trans. Plasma Sci.

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Railguns can reach higher muzzle velocities and fire rates than conventional guns. Muzzle velocities up to 2400 m/s and fire rates of more than 50 Hz have already been demonstrated with projectiles having a mass of 140 g and a square caliber of 25 mm. We investigated if a close-in weapon system (CIWS) based on a railgun performs better against incoming antiship missiles than a conventional CIWS such as the goalkeeper and propose solutions to optimize the performance of such a railgun. CIWSs are operational systems that defend a ship against incoming subsonic antiship missiles. However, the future antiship missiles will be supersonic and more difficult to defeat with conventional gun systems. Railguns are expected to perform better against these future threats thanks to their higher muzzle velocity and fire rate. Furthermore, the muzzle velocity within a single burst can be varied easily from shot to shot, generating a so-called intelligent burst. It allows varying the velocity of each projectile such that all projectiles arrive on the target at the same time. The number of projectiles, and thus the electrical energy required to achieve a target kill with an intelligent burst is expected to be lower than for railguns firing at constant muzzle velocity. In the first part, the performance of an electromagnetic CIWS is discussed using simulation models calculating the hit probability of a burst of projectiles fired with muzzle velocities ranging from 1200 to 2400 m/s and fire rates ranging from 75 to 300 rounds/s. The geometry of the target is that of a typical antiship missile, its velocity ranges from subsonic (300 m/s) to supersonic (600 m/s). The influence of the projectile mass on the performance of the system and the required electric energy was also investigated. We confirmed that the concept of intelligent burst reduces the required electric energy, especially against supersonic targets. The second part deals with some technical aspects of high fire rate railguns. We have shown experimentally that an automatic loading system allows increasing the fire rate of a medium caliber railgun from 50 to 75 Hz.

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Electrodynamic response study on railgun launcher based on electromechanical coupling model

Xiao

Yin

2019

Defence Technology

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Design Considerations for an Electromagnetic Railgun to be Used Against Antiship Missiles

Cited by 11 publications

References 11 publications

Performance Evaluation of Radar Array Antennas Based on Complex Received Currents Using Full-Wave Simulations with Surrounding Platforms

Performance Evaluation of Radar Array Antennas Based on Complex Received Currents Using Full-Wave Simulations with Surrounding Platforms

Design Considerations for an Electromagnetic Railgun Firing Intelligent Bursts to Be Used Against Antiship Missiles

Electrodynamic response study on railgun launcher based on electromechanical coupling model

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