为了获取末敏子弹稳态扫描阶段的飞行姿态,根据无陀螺惯性测量单元(GF-IMU)测量原理,提出了一种十加速度计配置方案以及姿态解算算法。通过弹体运动模型,对所设计的测量单元运用MATLAB进行了仿真分析。仿真结果表明:在30 s内,质心线加速度可忽略不计,角速度随着时间增加,误差逐渐增加,但增加程度较小。由于末敏子弹稳态扫描时间只有十几秒,因此该测量单元能较为准确获取末敏子弹稳态扫描过程的姿态数据。

In order to obtain the flight attitude of terminal-sensitive bullet in stable state scanning phase, and according to the measuring principle of gyroscope-free inertial measurement unit (GF-IMU), a ten accelerometer configuration scheme and attitude calculation algorithm were put forward. With projectile motion model, the designed GF-IMU was simulated and analyzed by MATLAB. The result shows that in 30 seconds, the centroid linear acceleration can be neglected. As time increases, angular velocity increases, and the error increases gradually, but the extent of increase is small. Since the steady-state scanning time of terminal sensitive bullet is only more than ten seconds, the measurement unit can accurately obtain the attitude data of the steady state scanning stage of terminal-sensitive bullet.