弹体滚速和舵机时间常数对炮弹制导精度的影响

通过建立滚转制导炮弹的动力学模型,分析了弹体滚转速度与舵机时间常数对于炮弹落点精度的影响.采用2对舵面控制俯仰与偏航运动的制导炮弹,它的舵系统输入指令为三角函数.随着滚速的提高和舵机时间常数的增大,舵系统的跟踪误差加大;在舵系统输入指令中适当增加相位超前角时,舵系统的跟踪精度显著提高,相位超前角约为弹体滚速和舵机时间常数的乘积.对包含舵指令转换方程和舵机动力学方程的制导炮弹动力学模型进行仿真.仿真结果表明,当弹体滚速为5 r/s,时间常数为0.01时,相位补偿前的落点误差为50.31 m;增加相位超前角2.5°,落点误差为5.14 m.说明选择与弹体滚速和时间常数相匹配的相位补偿角可大大提高制导炮弹的落点精度.该文分析结果可为炮弹滚转速度选择和舵机系统设计提供参考.

Effect of Roll Angular Velocity and Actuator Time Constant on Guidance Precision of Guided Projectile

This paper presents the effect of the actuator time constant and roll angular velocity on the fall point accuracy of the guided projectile by building a dynamic model.The input commands of an actuator are trigonometric functions when the guided projectile is equipped with a pair of control surfaces to control the pitch and yaw.The tracking error of the actuator increases with the increment of the roll angular velocity and the actuator time constant.If the proper phase lead angle is added to the input comman...