串联谐振式半正弦航空电磁发射系统

A half sine electromagnetic launching system with series resonant type

为增大直升机吊舱式航空时间域电磁发射系统的发射磁矩,提高空间分辨能力,设计一种由电阻、电感和电容组成的RLC串联谐振式半正弦航空电磁发射系统。采用RLC串联谐振的方法实现提高发射电流的上升与下降速率,得到发射磁矩大、电流峰值高、波形稳定性好的半正弦波发射电流;采用单稳态触发芯片延时主控单元控制信号的方法,消除下降沿过冲;研究峰值电流采集记录技术,并通过Simulink仿真与实验验证理论分析的正确性。研究结果表明:由RLC串联谐振方法得到的发射电流峰值为2 550 A,最大发射磁矩可达510 kA·m^2,脉宽为4.1 ms,具有发射磁矩大、电流峰值高、波形稳定性好、空间分辨能力强的特点。

A half sine electromagnetic launching system with series resonant type was designed to increase the emission magnetic moment and spatial resolving power of the airborne electromagnetic transmitter system. The RLC series resonance method was used to achieve emission current and magnetic moment. The method of controlling the signal of the main control unit with a single stable trigger chip was used to eliminate the falling edge of the overshoot, the peak current collecting and recording technology was studied, and the correctness of theoretical analysis was verified by simulation and experiment. The results indicate that the emission current of the system is 2 550 A, the maximum emission magnetic moment can reach 510 kA·m^2, and the pulse width is 4.1 ms, and has the characteristics of high magnetic moment, high current peak value, good stability of wave shape and strong spatial resolution.