窄带多普勒信号实时处理系统设计  

Design of real-time processing system for narrowband Doppler signal

作　　者：郭善峰 张丕状[1] Guo Shanfeng;Zhang Pizhuang(Key Laboratory of Instrumentation Science ＆ Dynamic Testing of the Ministry of Education, The North University of China, Taiyuan 030051, China)

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室

出　　处：《国外电子测量技术》2018年第4期87-90,共4页Foreign Electronic Measurement Technology

摘　　要：在当今这个智能信息时代,火炮发射的自动控制程度将直接影响到战局的走向,其中炮口速度的实时反馈是实现自动控制最重要的一环。论文使用多普勒雷达测量制式火炮弹丸炮口速度,针对制式炮炮口速度变化维持在较小范围内的特征,根据多普勒信号在频域中频谱为窄带信号的特点,提出了将多普勒信号进行频移,使窄带信号转移到低频频段进行处理的方法,同时为了提高处理速度,优化了数据采集和处理方法。本系统通过对多普勒信号进行放大、滤波、混频、采集,使用实数快速傅里叶变换法和多普勒原理,求出火炮弹丸在炮口的速度。速度测量精度达到了实战要求,数据处理速度小于装弹时间,能够及时反馈给控制单元以调整发射角度,可以实现智能化控制。In today＇s era of intelligent information,the degree of automatic control of artillery firing will directly affect the direction of the war.Real-time feedback of muzzle velocity is the most important part of automatic control.In this paper,the muzzle velocity of the artillery projectile was measured by using Doppler radar.According to the characteristic that the Doppler frequency spectrum is a narrowband signal in the frequency domain,Doppler signal frequency shift,the narrowband signal to the low frequency band for processing method,and in order to improve the processing speed,optimizing the data acquisition and processing methods.The system through the Doppler signal amplification,filtering,mixing,acquisition,the use of real fast Fourier transform and Doppler principle,to find the speed of artillery projectile in the muzzle.Speed measurement accuracy to meet the actual requirements,data processing speed is less than the loading time,timely feedback to the control unit to adjust the launch angle,you can achieve intelligent control.

关 键 词：窄带信号 数据处理 炮口速度 实时性 

分 类 号：TJ306.1[兵器科学与技术—火炮、自动武器与弹药工程] TN958.95[电子电信—信号与信息处理]