为了实时获得滚转弹药的飞行角速度,提出了一种基于地磁组件的角速度测量方法。该方法采用地磁传感器获得大地磁场强度在弹体三轴的投影及其变化率,并结合刚体转动运动模型,利用卡尔曼滤波器来获得滚转弹药的角速度。文中所提出的算法不同于其他的角速率估计器,不使用弹体的姿态,使得该算法适用于滚转弹药。仿真结果表明:该算法能很好的估计出滚转弹药的角速度,误差在允许的范围内,有较高的应用价值。

In order to obtain real-time flight ammunition's roll angular velocity, angular velocity measurement method was proposed based on geomagnetic components.The method uses a geomagnetic sensor to obtain its projected rate of change in the earth's magnetic field strength tri-axial projectile, combined with rotational movement of rigid model, using the extended Kalman filter to get the roll angular velocity of ammunition.The proposed algorithm is different from other angular rate estimators, it does not use missile attitude, makes the algorithm applicable to rolling ammunition.The simulation results show that:the algorithm can efficiently estimate angular velocity of rolling ammunition, the error is in the allowable range, it has higher application value.