重力补偿比例导引的二维修正迫弹弹道仿真

Trajectory Simulation Based on Proportional Navigation with Gravity Compensation for Mortar Projectiles

为发展具有精确打击能力的制导弹药,研究基于120 mm口径的一对NACA翼型鸭式布局二维弹道修正迫弹的弹道特性。在采用Fluent软件得到新型制导弹丸的气动力系数的基础上,引入两种方式的重力补偿比例导引律进行末制导,得到了不同比例导引方式下的弹道仿真数据,最后对仿真结果进行分析。结果表明,新型制导弹丸具有较好的弹道修正能力,且使用重力补偿比例导引方式可大大降低过载,为基于一对NACA翼型鸭式布局制导迫弹的设计提供依据和参考。

In order to develop capability of precision guided munition, ballistic characteristics of two dimensional trajectory correction pro- jectile with a pair of NACA airfoil based on 120 mm mortar projectiles were studied. First of all, based on establishment of the trajectory correction model, the aerodynamic coefficients of mortar projectiles under different operating conditions were calculated by using Fluent, and then two ways of proportional guidance law of gravity compensation to terminal guidance of the projectiles were introduced, and the traj- ectory simulation data under different proportional guidance was obtained, finally, the simulation results were analyzed. The results show that this kind of guided projectile has better trajectory correction ability, and utilization of proportional guidance with the over-gravity compensation could greatly reduce the overload, which can provide reference for the follow-up design of guided mortar projectiles.