摘要
为了探究锥形载体再入飞行时,其运动因素对雷达引信回波中多普勒频率成分的影响规律,通过建立多坐标系,利用坐标系之间的转换关系,准确构建了锥形载体的运动模型,并在时频域范围内,重点分析了飞行速度、再入倾角、摆动和锥进对多普勒频率成分的影响规律。为了验证影响规律的正确性,以短时傅里叶变换(STFT)为中心思想,利用Matlab软件对雷达引信的回波信号进行仿真,仿真结果与运动模型得到的理论值相符,表明运动模型合理,并且分析得到的影响规律正确。
In order to obtain the law of the influence of motion factors of cone carrier on the Doppler frequency of radar fuze echo in its reentry flight the motion model of the carrier is constructed accurately through the establishment of multi-coordinate system and by use of the conversion between the coordinate systems. Analysis is made to the influence of such motion factors as flight velocity reentry dip angle swing and cone on the Doppler frequency components of the radar fuze echoes in the time-frequency domain. In order to verify the correctness of the law of influence the echo signal of the radar fuze is simulated by using Matlab software with the Short-Time Fourier Transform( STFT) as the central idea. The simulation results are consistent with the theoretical values. It shows that the motion model is reasonable and the law of influence is correct.
作者
蔡尚君
左东广
朱晓菲
CAI Shang-jun;ZUO Dong-guang;ZHU Xiao-fei(Rocket Force University of Engineering,Xi'an 710025,China)
出处
《电光与控制》
CSCD
北大核心
2019年第1期55-60,共6页
Electronics Optics & Control
关键词
多普勒频率
运动因素
时频分析
短时傅里叶变换
雷达引信
锥形载体
再入飞行
Doppler frequency
motion factor
time-frequency analysis
short-time Fourier transform
radar fuze
cone carrier
reentry flight
