基于锁相环的滚转姿态测量仿真研究

为实时监测高旋弹飞行过程中的滚转速率与相位,常规测量方法难以满足量程、精度上的工程需求,提出一种基于地磁传感器的锁相环跟踪环路测量方法.通过SIMULINK建立不同阶次锁相环的滚转测量模型,确定合适的环路滤波器阶次与积分清除时间,完成对滚转速率与相位的实时测量.仿真结果表明,2阶锁相环在对高旋弹滚转测量中,相位跟踪存在一定跟踪误差且跟踪较为缓慢;3阶及4阶锁相环可以对地磁传感器输入信号实现频率与相位的有效跟踪,从而精确解算出高旋弹滚转速率与滚转相位,具有较高的应用实现价值.

Simulation of rolling aattitude measurement based on PLL

To real-time monitor the Rolling Rate and Phase of high spin projectile in flighting,general measurement method is difficult to meet the engineering requirements,this paper presents a geomagnetic sensor based phase-locked loop tracking loop measurement method.The rolling measurement model of PLL with different order is established by SIMULINK,determine the appropriate loop filter order and integral-dump time,complete the real-time measurement of the rolling rate and phase.Simulation results show,2nd order phase PLL in high-spin roll measurement,there is a large tracking error and tracking more slowly in phase tracking;3rd and 4th order phase PLL can tracking effectively to carry the frequency and phase of geomagnetic sensor signal,thereby calculating the high spin rolling speed and phase,it has a higher application value.