基于脱靶量预测的脉冲末修迫弹控制方法研究

Research on Control Method for Terminal Correction Mortar Projectiles Subjected to Lateral Impulses Based on Miss Distance Prediction

针对脉冲末修迫弹的控制问题,提出了一种基于脱靶量预测的控制方法。分析了脉冲控制力与控制力矩,推导了有控六自由度运动方程组;利用捷联激光导引头测得的弹目偏差角及其方位信息,建立了脱靶量预测模型;在此基础上设计了脉冲工作模式,给出了脉冲作用个数与启控方位的确定方法。算例仿真结果表明,利用所提出的控制方法能够将圆概率误差减少约80%,有控弹道落点平均脱靶量为7.85 m,证明该方法能够有效修正偏差,提高落点精度。

In view of the control problem of terminal correction mortar projectiles subjected to lateral impulses, a control method based on miss distance prediction was proposed. The impulse control force and control torque were analyzed, and the controlled 6-degree-of-freedom motion equations were deduced. By using the deviation angle and its azimuth information between projectile and target measured by strap- down laser seeker, a miss distance prediction model was established. On this basis, the thruster working mode was designed, also, the methods of determining the number of thrusters needed and the direction of starting control were given. Simulation results indicated that the circular error probable （CEP） was reduced by 80% , and the mean miss distance of the controlled impact points was 7.85 m. It proved that the proposed control method could correct the trajectory deflections effectively and thus improve the hit precision.