Analysis of the Influence of System Parameters on Launch Performance of Electromagnetic Induction Coil Launcher

Guan, Shaohua; Guan, Xiaocun; Wu, Baoqi; Shi, Jingbin

doi:10.3390/en15207803

Cited by 5 publications

(4 citation statements)

References 34 publications

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“…Reluctance coil gun (RCG) is a device that spits projectiles of ferromagnetic materials out of the barrel by electromagnetic force [1]. Compared with other types of electromagnetic launchers, RCGs have the following advantages: 1) the armature does not need to be power fed, which is suitable for harsh working environment; 2) the armature can be magnetically suspended in the launch tube to accelerate [2], [3], so it is not easy to be damaged by friction; 3) small induction eddy current on the armature [4], [5], not easy to heat up; 4) it is easy to realize small size and lightweight design; 5) the driving current is low [6], the components are small and low cost [1], and high safety of launch. Therefore, the RCG is easier to realize portable design.…”

Section: Introductionmentioning

confidence: 99%

Specified Velocity Launching of Reluctance Coil Gun Based on Genetic Algorithm

Zhang

2024

IEEE Access

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In this study, a method is proposed to obtain the initial voltage of the capacitor and the initial relative position of the projectile of a reluctance coil gun using a genetic algorithm to make the projectile launch at a specified muzzle velocity with high efficiency. Firstly, the equivalent inductance change during the launching process is used as a link for multi-physics field analysis, and a set of electromagnetic dynamics equations is derived to correct the effect of magnetic saturation on the inductance according to the current value in the coil. Further the set of equations is constructed as a Simulink discretized numerical computational program and called by a genetic algorithm written in MATLAB to approximate the optimal solution by generation-by-generation optimization. When the specified projectile muzzle velocity is set to 10 m/s, the initial voltage of the capacitor calculated using the genetic algorithm is 156 V, and the initial position of the projectile is −14.3 mm. We input the parameters into the finite element analysis model and the launch experiment platform, and the obtained projectile muzzle velocity is 9.67 m/s and 9.8 m/s respectively, and the efficiency is close to the optimal value, also the comparison of voltage and current waveforms also shows that the method proposed in this study is effective.INDEX TERMS reluctance coil gun, equivalent inductance, genetic algorithm, specified muzzle velocity, launching efficiency.

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Section: Introductionmentioning

confidence: 99%

Specified Velocity Launching of Reluctance Coil Gun Based on Genetic Algorithm

Zhang

2024

IEEE Access

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“…[1], [2]. Reluctance coil launcher is one of the coiltype launchers, mainly characterized by a ferromagnetic projectile material [3], whose launching process is not only transient, but also very difficult to analyze due to the strong nonlinearity [4]. Compared to other types of EMLs, the advantages of reluctance coil launchers include small size, light weight, low drive current, no friction, low sound, and good controllability [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Reluctance Coil Launchers Driven by Distributed Feeder Circuit

Lu,

Yi,

Yuan

et al. 2024

IEEE Access

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Reluctance coil launchers usually use a pulse current formed by capacitive discharge to excite the excitation coil when launching. The pulse current peaks are high, and the projectile usually undergoes deep magnetic saturation, resulting in low launching efficiency. To address this problem, this article proposes using distributed feeder circuit to drive reluctance coil launchers, replacing the traditional single set of large-capacity capacitor discharge scheme with multiple small-capacity capacitors discharged in a time-sequential manner, so as to reduce the peak current and suppress magnetic saturation problems. The study includes two main aspects, one is to study the effect of the driving method on the launch performance and analyze the reasons; the other is to propose the calculation of the time-varying data in the launch process by the time-segmented calculation method. The efficiency of the model described in the paper is only 1.301% when using a single high-capacity capacitor for launching, while the launching efficiency is increased to 3.535% when driven by the distributed feeder circuit, indicating that the method can effectively improve the launching performance.INDEX TERMS Reluctance coil launcher, magnetic saturation, distributed feeder circuit, flat-topped wave current, time-segmented calculation method.

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“…24 Shaohua Guan focused on analyzing the influence of system parameters on the launch performance of electromagnetic induction coil launchers. 25 The electromagnetic force calculation model of magnetoresistive electromagnetic launch is widely used. 26,27 Vangheluwe L proposed a numerical simulation model that can calculate the tension curve of weft yarn during weft insertion.…”

Section: Introductionmentioning

confidence: 99%

Dynamic prediction model of segmented combined electromagnetic launch weft insertion for super-wide width industrial fabrics

Ding

Zhang

et al. 2023

Journal of Industrial Textiles

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Stable, reliable and high-speed weft insertion is an urgent challenge for high-speed industrial textile weaving devices. More stable and large electromagnetic forces can be provided by the segmented combined electromagnetic launch weft insertion, compared to the conventional electromagnetic launch weft insertion, which facilitates the realization of high-speed weft insertion. For digital electromagnetic launch weft insertion textile devices, it is necessary to respond quickly to the signals fed back by the sensors. Therefore, a fast and high-precision dynamical model capable of characterizing the kinematic properties of the weft inserter is extremely essential for control, which is conducive to the stable and reliable operation of the device. In this paper, we consider the electromagnetic force, weft yarn tension, air resistance, pipe wall friction, and gravity during the movement of the weft inserter, and establish a dynamic prediction model of segmented combined electromagnetic launch weft insertion (DPMSCEI) for control. Combining simulations and experiments to evaluate the performance of DPMSCEI validates the effectiveness and professionalism of DPMSCEI in solving electromagnetic weft insertion dynamics.

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Analysis of the Influence of System Parameters on Launch Performance of Electromagnetic Induction Coil Launcher

Cited by 5 publications

References 34 publications

Specified Velocity Launching of Reluctance Coil Gun Based on Genetic Algorithm

Specified Velocity Launching of Reluctance Coil Gun Based on Genetic Algorithm

Performance Analysis of Reluctance Coil Launchers Driven by Distributed Feeder Circuit

Dynamic prediction model of segmented combined electromagnetic launch weft insertion for super-wide width industrial fabrics

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