制导弹药发射时,高冲击影响下传感器零位会发生移位,从而引入过载零位误差,因此需要设计基于扰动模型的过载滤波算法。文中分析了弹道的长、短周期扰动,设计了适用于卫星制导弹药过载参数辨识的衰减记忆法扩展卡尔曼滤波算法,并且采用最小二乘算法滤除加表、弹道过载短周期扰动,从而实现了过载零位误差校正。文中通过仿真与实弹试验的方式验证了校正算法的正确性,发现校正算法具有精度高、运算速度快等优点,适宜于工程应用。

When guided munitions is launched, sensor zero will shift by high impact, which would produce zero error in process of solving overload by accelerometer, therefore, in this paper, the overload filtering algorithm based on disturbance model was designed. Firstly, a memory attenuated extended Kalman filter for overload parameter identification of satellite-guided munitions was designed by analyzing long and short period of trajectory disturbance, and the short period disturbance of accelerometer and trajectory was filtered out through least squares algorithm to calibrate overload zero error. What's more, the experimental results and firing practice show that correction algorithm has less computational cost and is more accurate and simpler for application in engineering.