无人机全航空时间域电磁探测组合脉冲发射技术  

Unmanned aerial vehicle time domain electromagnetic detection combination pulse launch technology

作　　者：马洪翔 刘丽华 晏使楚[1,3] 史亦童 刘小军 方广有 MA Hongxiang;LIU Lihua;YAN Shichu;SHI Yitong;LIU Xiaojun;FANG Guangyou(Aerospace Information Research Institution,Chinese Academy of Sciences,Beijing 100094,China;School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Electromagnetic Radiation and Sensing Technology,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院空天信息创新研究院,北京100094 [2]中国科学院大学电子电气与通信工程学院,北京100049 [3]中国科学院电磁辐射与探测技术重点实验室,北京100190

出　　处：《中南大学学报（自然科学版）》2024年第10期3756-3767,共12页Journal of Central South University:Science and Technology

基　　金：国家重点研发计划项目(2023YFB3905001)。

摘　　要：针对无人机平台电磁探测需求,提出一种应用于无人机全航空时间域电磁探测的双极性组合电磁脉冲发射技术,利用可调参组合脉冲实现浅表盲区压制、深浅兼顾的近地表精细探测。针对目前轻型发射系统为降低质量普遍采用的无源钳位技术存在钳位电压和介入时间不可调整的缺点,并考虑发射脉冲智能关断需求和难点,提出一种有源自适应可调钳位技术。在对发射系统的质量、体积、功耗有严格限制的条件下,突破钳位电压固定、电流脉冲关断时间不可调的局限性,通过对发射参数实时采集反馈及相应的自适应控制策略实现发射电流下降沿自适应钳位和参数优化,实现电流脉冲关断速率自适应精确调控。研制适用于无人机平台的组合脉冲电磁发射系统,并完成整体系统搭建与集成测试。研究结果表明:发射系统在满足轻量化、小型化的条件下,可以实现高质量双极性组合电磁脉冲的长时稳定高功率发射,不仅发射脉冲的峰值、占空比、周期等参数均可调,且电流脉冲关断速率可实现自适应精确可调与参数优化,满足无人机全航空时间域电磁探测系统应用要求。Aiming at the electromagnetic detection requirements of UAV platform,a bipolar combined electromagnetic pulse transmitting technology was proposed for the full airborne time domain electromagnetic detection of unmanned aerial vehicles(UAS),which used the tunable combined pulse to achieve shallow blind area suppression and depth and shallow precision detection.In order to reduce the mass of light launch systems,the passive clamping technology has the disadvantages of unadjustable clamping voltage and intervention time,and considering the needs and difficulties of transmitting pulse intelligent shutdown,an innovative adaptive clamping technology was proposed.Under the condition that the mass,volume and power consumption of the transmitting system were strictly limited,the clamping voltage was fixed and the current pulse turn-off time was not adjustable,and the transmitting current falling edge adaptive clamping and parameter optimization were realized through real-time acquisition feedback of transmitting parameters and corresponding adaptive control strategy,and the current pulse turn-off rate adaptive accurate regulation was realized.A combined pulse electromagnetic launch system suitable for UAV platform was developed,and the whole system construction and integration test were completed.The results show that under the condition of lightweight and miniaturization,the launching system can realize long-term stable and high-power emission of high-quality bipolar combined electromagnetic pulse.Not only the peak value,duty cycle,period and other parameters of the transmitting pulse can be adjusted,but also the current pulse turn-off rate can be adaptive and accurately adjustable with parameter optimization,which meets the application requirements of the UAV all-aviation time-domain electromagnetic detection system.

关 键 词：时间域电磁法 无人机全航空 双极性组合电磁脉冲 有源自适应可调钳位 

分 类 号：P631.8[天文地球—地质矿产勘探]