弹丸滚转角速度测量系统的设计与实现

Design and realization of roll angular speed measurement system for projectile

为了实现弹丸在飞行过程中的姿态测量,设计一种低成本、小体积的滚转角速度测量系统。该系统主要使用地磁传感器获取地磁在其3个正交轴上的分量,经过放大放大、滤波与实时的零偏校正处理,进而根据所检测到的地磁数据的变化解算出滚转角速度。并经理论推导了地磁滚转角速度测量弹体滚转角速度的可行性,并给出了适用条件与局限性。通过实验验证,该方法能在一定的条件下够测得相对精准的滚转角速度,并使得测量系统的体积、重量和成本降低。

A low-cost small-size roll angular speed measurement system is designed mainly for getting the attitude of the projectile. The system using magnetic sensor to measure the geomagnetism. The roll angular speed can be calculated when the signal is amplified, filtered and bias corrected. The feasibility of the roll angular speed measurement system is proved through theoretical derivation, and the applicable conditions and limitations are given out. Experiments shows this method can get accurate roll rate under certain conditions, and the cost and size are reduced.