基于平面地磁感应线圈测量高速自旋弹丸转速的方法

针对高自旋弹丸的转速测试问题，推导了在三维转动中地磁感应线圈的输出公式，并在合理的假设下对高自旋弹丸的输出信号进行了简化，给出了输出信号的半周期确定方法及基于相位信息的转速测试原理。测试结果表明，利用本文方法得到的转速曲线和遥测结果是一致的。

Method of measuring rotation speed of high spinning projectile based on plane magnetic induction coil

For the test of rotation speed of high spinning projectile,the general formula of the motional electromotive force (MEMF)of planar magnetic induction coil (PMIC)is derived in case of 3D rotation in a stable magnetic field.Under a reasona-ble assumption,the MEMF of PMIC is simplified after the aforementioned general formula is used to calculate high spinning PMIC in the geomagnetic field environment.The determination approach of half-cycle is discussed and the method of rotation speed test is studied,and a test is conducted in the paper.The rotation speed curve obtained by the approach in this paper is consistent with the curve by telemetry.