固定鸭舵式二维弹道修正榴弹偏流特性分析

安装二维弹道修正引信后大口径榴弹的弹道特性发生了较大变化,偏流等弹道特性和修正控制机理的研究是面临的重要问题。针对该问题,基于双旋弹丸的攻角方程,通过无控和有控两种状态下动力平衡角和偏流解析表达式的推导,定性分析了偏流的影响因素,并采用系数冻结法给出了偏流的定量计算方法。通过分析有控状态下控制力项对动力平衡角和攻角变化的影响,研究了修正控制对偏流的影响规律。仿真结果表明,弹体转速、射角、飞行时间、固定鸭舵滚转角等是影响偏流的重要因素,所给出的偏流计算方法可较精确的计算偏流值。研究结果可应用于固定鸭舵式二维弹道修正榴弹的总体设计中,对该型弹丸的研究具有理论和工程意义。

Ballistic drift analysis of two-dimensional trajectory correction projectiles with fixed-canards

The trajectory characteristics of large caliber projectiles change a lot after installing the two-dimension course correction fuze. The trajectory characteristics, like ballistic drift, and the trajectory correction mechnism are important issues needed to be researched. Based on the equation of the attack angle, the analytic formula of the dynamic equilibrium angle and drift is developed when the shell is in the no-control and control state, then the influence factors are analyzed. The way to ballistic drift value computing is acquired by using the frozen-coefficient method. Through studying the influence of correction on the dynamic equilibrium angle and attack angle, the correction mechanism is found. Simulation results show that the projectile spin angle velocity of the shell, fire angle, flight time, and the roll angle of the fixed-canards are important influencing factors of the drift, and that the 〖JP2〗drift computing method can acquire the drift value exactly.