基于SINS/GPS的子母弹侧风解算方法

Method of Wind Estimation for Dispenser Weapon Based on SINS/GPS

为提高空地制导布撒武器子弹药命中精度,在不加装任何测风设备的基础上,在制导闭环条件下利用弹上惯导系统输出信息进行水平面内的侧向风速度估计.根据工程经验,建立了六自由度数学模型以及误差模型,对常值风及随高度变化风场条件下的风速估计算法进行验证,风速估计精度达到4.26m/s(3σ).仿真结果表明,侧向弹道机动为影响侧风估计精度的主要因素,在机动过载小于0.05的条件下,能够保证综合风速估计精度小于5.72m/s(3σ).

To improve the hitting accuracy of air-to-ground weapon,the velocity of lateral wind on the horizontal plane was estimated using the information output by SINS under the conditions of closed-loop guidance without any wind measurement device.According to engineering experience,6-DOF mathematical model and error model were constructed.Aiming at constant wind and wind varying with height,the estimation algorithm of wind veloity was verified respectively.The estimation error of wind velocity is 4.26 m/s（3σ）.The simulation result shows that the lateral ballistic maneuver is the main factor affecting estimation error of lateral wind.It can be ensured that the estimation error of wind velocity is less than 5.72 m/s（3σ） while the maneuverable overload is less than 0.05.