针对高速旋转弹用磁传感器的误差校准参数在发射前后发生变化,造成磁测姿态误差较大的问题,文中提出了基于递推最小二乘估计的磁传感误差参数的在线校准方法。滤波器选取磁传感器的误差模型为系统的动态方程,磁传感器输出作为量测信息,采用递推最小二乘估计完成误差参数估计。以152mm炮射榴弹为仿真对象,对所设计的滤波器进行仿真验证,结果表明该方法能有效的提高磁测姿态系统的测量精度。

Magnetometer nuisance parameter is changed when high-speed spinning projectile is launched, and orientation measuring accuracy can be affected by poor measurement output. A novel calibration algorithm was introduced for high-speed spinning projectile applications. Magnetometer error model was used for the system dynamic equations, and the measurements were sensor outputs. Adaptive recursive least squares estimation method was used to estimate the magnetometer nuisance parameter online. The 152 mm diameter projectile was simulated, and results show that the adaptive filter algorithm has strong feasibility, which can effectively weaken the impact of various noise sources of the attitude detection system.