Design of pulsed coil-guns

Williamson, S.; Horne, C.D.; Haugh, D.

doi:10.1109/20.364639

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…In future work, the structure of the coil gun will be optimized, dividing the coil into several smaller coils activated sequentially. For example, scenarios using two, three, or four coils (each one having a half, a third, or a quarter of the total turns of the initial coil) triggered sequentially by software or using a position sensor instead of a single coil, as shown in Figure 17, will be evaluated as in [6,7]. This will lead to having a maximum current on each coil successively when the rod is optimally placed in the coil, leading to an increased projectile speed.…”

Section: Discussionmentioning

confidence: 99%

Modeling and Optimization of an Indirect Coil Gun for Launching Non-Magnetic Projectiles

Giès

Soriano

2019

Actuators

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This article focuses on indirect coil guns used for launching non-magnetic objects. A mechatronic model, coupling electrical, mechanical, and electromagnetic models, is proposed. This model is applied to the optimization of a kicking system used on limited size robots for propelling real soccer balls at the RoboCup. Working with an existing coil gun, we show that fine tuning its setup, especially the initial position and the length of the non-magnetic plunger extension, leads to an increase in the ball speed of 30 % compared to previous results.

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Section: Discussionmentioning

confidence: 99%

Modeling and Optimization of an Indirect Coil Gun for Launching Non-Magnetic Projectiles

Giès

Soriano

2019

Actuators

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“…A second way of improving the energy transfer of a coil gun is to modify its inner structure by splitting the coil and the energy storage capacitor into several ones [7,13], without changing the overall quantity of coil copper and the overall capacitance value. Instead of sending an energy pulse to a single coil, a sequence of smaller energy pulses will be sent to the different coils propagating the magnetic force along the coil as the plunger enters it.…”

Section: Reluctance Coil Guns: a Ball Launcher That Can Be Optimizedmentioning

confidence: 99%

Optimisation of Energy Transfer in Reluctance Coil Guns: Application to Soccer Ball Launchers

et al. 2020

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Reluctance coil guns are electromagnetic launchers having a good ratio of energy transmitted to actuator volume, making them a good choice for propelling objects with a limited actuator space. In this paper, we focus on an application, which is launching real size soccer balls with a size constrained robot. As the size of the actuator cannot be increased, kicking strength can only be improved by enhancing electrical to mechanical energy conversion, compared to existing systems. For this, we propose to modify its inner structure, splitting the coil and the energy storage capacitor into several ones, and triggering the coils successively for propagating the magnetic force in order to improve efficiency. This article first presents a model of reluctance electromagnetic coil guns using a coupled electromagnetic, electrical and mechanical models. Four different coil gun structures are then simulated, concluding that splitting the kicking coil into two half size ones is the best trade-off for optimizing energy transfer, while maintaining an acceptable system complexity and controllability. This optimization results in robust enhancement and leads to an increase by 104 % of the energy conversion compared to a reference launcher used. This result has been validated experimentally on our RoboCup robots. This paper also proves that splitting the coil into a higher number of coils is not an interesting trade-off. Beyond results on the chosen case study, this paper presents an optimization technique based on mixed mechanic, electric and electromagnetic modelling that can be applied to any reluctance coil gun.

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“…In recent years, the developments on the power electronics have provided important progress in the area of applications of electromagnetic coil-guns. The multi-stage induction coil-guns among the electromagnetic weapons with different types [1,2] and different working principles [3][4][5][6][7][8][9] might be considered as the guns having greater expectancy in the near future [10][11][12]. In our study, a micro-controller controlled, four stage induction coil-gun with new characteristics has been designed.…”

Section: Introductionmentioning

confidence: 99%

Optimization of parameters acting on a projectile velocity within a four stage induction coil-gun

Coşkun

Kalender²,

Ege

et al. 2010

Measurement

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Design of pulsed coil-guns

Cited by 6 publications

References 7 publications

Modeling and Optimization of an Indirect Coil Gun for Launching Non-Magnetic Projectiles

Modeling and Optimization of an Indirect Coil Gun for Launching Non-Magnetic Projectiles

Optimisation of Energy Transfer in Reluctance Coil Guns: Application to Soccer Ball Launchers

Optimization of parameters acting on a projectile velocity within a four stage induction coil-gun

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