基于科氏加速度的旋转弹滚转角测量方法

摘要

Aiming at the problems of complex structure,high cost in roll angle estimation of high spinning shell,a method based on Coriolis acceleration was proposed.The method used an accelerometer with its input axis co-aligned with the shell's longitudinal spin axis and mounted at some distance off the center in the fuze.Firstly accelerometer was used to measure the longitude acceleration,then the band-pass filter was used to pick up the Coriolis acceleration,finally,the application of Phase-Lock Loop figured out the Coriolis acceleration signal's phase,and this sinusoidal Coriolis acceleration phase was the shell's roll angle.The simulation result indicated that this method could meet the demands of two-dimension trajectory correction projectiles system,and the structure of the system was simplified sharply.%针对高动态弹道环境下的旋转稳定弹滚转角测量结构复杂、成本高的问题,提出了基于科氏加速度的滚转角测量方法.该方法加速度计安装时轴线与弹轴平行但不重合,存在偏心距,首先利用加速度计测量弹丸轴向加速度,然后利用带通滤波提取输出信号中包含的科氏加速度信号,最后用锁相环电路锁定科氏加速度信号相位,该相位即为弹丸的滚转角.仿真结果表明,该方法对于滚转角的测量精度能够满足二维弹道修正系统对弹丸滚转角测量的要求.该方法仅使用一个加速度计,结构大为简化.