基于GPS载波相位差的炮弹滚转角测量方法

Measurement Method of Projectile Roll Angle Based on GPS Phase Difference

针对高速旋转炮弹滚转角的测量问题,在分析相邻天线载波相位与滚转角数学关系的基础上,将载波相位差作为弹体滚转角的量测,最后使用扩展卡尔曼滤波技术估计弹体滚转角和滚转角速率。实验和数字仿真结果表明基于GPS载波相位差的滚转角测量方法在工程应用上是可行的,为高速旋转制导修正炮弹滚转角的实时测量提供了一种技术途径。

For fast spinning projectile roll angle measurement problems, we first analysis the mathematical relationship between roll angle and adjacent antennas＇ carrier phases, then take the carrier phases＇ differences as roll angle measurements and process them in an Extended Kalman filter to obtain the roll angle and roll rate. Experiments and simulations show that the method is feasible in engineering applications and it provides a technique means for real-time measurement of fast spin- ning projectile roll angle.