Velocity Precision Analysis With the Small Caliber Electromagnetic Launch

Xu, Weidong; Yuan, Wu; Che, Yunlong; Fu, Rongyao; Wang, Jiong; Zhang, Dongdong; Yan, Ping

doi:10.1109/tps.2017.2705246

Cited by 6 publications

(1 citation statement)

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“…Moreover, most studies on structural design and optimization have focused on the interaction between the armature and rails [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. It has been reported that the contact relationship between the armature and rails plays a key role in launch performance [ 14 , 15 , 16 , 17 ] by affecting the velocity and precision of the system [ 18 , 19 , 20 , 21 , 22 , 23 ]. However, few studies have investigated the relationship between rails and insulators.…”

Section: Introductionmentioning

confidence: 99%

Factors Influencing the Expansion of Arch-Shaped Electromagnetic Railguns with Pre-Stressed Composite Barrels

et al. 2023

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Rail expansion significantly impacts the launch precision of a railgun system. Higher precision can be achieved when the extent of expansion is low. This paper investigates three main factors that influence the extent of rail expansion using the finite element method, including pre-stress, electromagnetic load, and stiffness of the insulators. The mean squared error between experiment results and simulating results is less than 0.06, validating the finite element model. The simulated results reveal that the extent of rail expansion increases with a decrease in pre-stress and an increase in electromagnetic pressure and the stiffness of the insulator is the most significant influencing factor, as the use of a stiff insulator not only results in a small extent of rail expansion but also delays the separation between the rails and insulators. The mechanism of how pre-stress influences the railgun system has been proposed. It has been expressed that the pre-stress maintains the integrity of the railgun system by hindering the process of a decrease in the contact surface area between rails and insulators during launch. The study provides a platform to improve the design of the railgun system.

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