摘要
对鱼雷电磁引信的接收信号进行同步检波处理是识别引信目标信号的包络、频率和相位参数的重要手段,当前的研究方法,因频域检波等方法提取的包络粗糙,且频率和相位识别精度低。为提高识别精度,建立了鱼雷电磁引信的目标信号模型,分析了乘积型和平衡叠加型两种同步检波技术的原理,用Matlab/Simulink仿真环境进行了仿真研究,得到了不同相差和频差条件下的同步检波输出信号,并通过对平衡叠加型同步检波器的一组实验数据进行最小二乘拟合处理,还得到频率特性曲线。上述仿真结果表明,同步检波技术可精确提取鱼雷电磁引信目标信号的包络参数,且频率和相位识别精度高。
Synchronous demodulation for the received signal of torpedo electromagnetic fuze is an important means to recognize the envelope,frequency and phase parameters of the target signal.Current study methods such as frequency-domain detection etc.have a disadvantage that the extracted envelope is coarse and the recognition precision of frequency and phase is low.The model of torpedo electromagnetic fuze target signal is set up,and the working principles of both the multiplication style and balanced superposition style synchronous demodulation are analyzed,and their simulation studies are done in Matlab/Simulink environment.The output signals of detector are obtained with different frequency-difference and phase-difference.According to the least-square fitting of a group of its environment data,the balanced superposition demodulator＇s frequency pass characteristic is got.The simulation results show that synchronous demodulation method can accurately demodulate the fuze target signal,and has a high precision in recognizing frequency and phase information contained in the target signal.
出处
《计算机仿真》
CSCD
北大核心
2010年第1期20-23,共4页
Computer Simulation
关键词
鱼雷
电磁引信
同步检波
仿真
Torpedo
Electromagnetic fuze
Synchronous demodulation
Simulation
