摘要
确定弹体滚转角信息是进行二维弹道修正的重要条件。针对此问题,文中提出了使用锁相环跟踪弹体天线接收外辐射源信号幅度变化,进而测量滚转角的方法,锁相环进入稳态后输出频率为转速、输出相位为弹体滚转角,并进行了半物理实验验证。仿真分析了基于外辐射源照射解算弹体滚转角的误差。结果表明,该方法无需安装磁强计,且滚转角解算误差不随时间积累,满足了滚转弹药平台的精度要求。
Roll angel information of projectile is needed in trajectory correction. This article proposes the use of the phase-locked loop to track the change in received waveform with roll and then to measure the roll angle. The PLL outputs frequency when steady as roll speed and phase as the roll angel. Semi-physical experiments are implemented to verify this algorithm. Errors of roll angle solved by PLL are analyzed by simulation, which shows that the errors of roll angle solved by PLL do not accumulate over time.
出处
《电子科技》
2014年第3期99-101,105,共4页
Electronic Science and Technology
关键词
外辐射源
锁相环
滚转角
external illuminators
phase-locked loop
roll angle
