变质心执行机构对弹头命中精度的影响分析

Analysing the Effect of Moving Center of Mass Servo System on Impact Accuracy of Reentry Warheads

弹头变质心机动控制是通过移动弹头的质心位置,利用气动配平力矩改变弹头的飞行姿态和攻角,从而可实现弹头机动控制。在给出变质心弹头的动力学方程的基础上,通过对该动力学方程进行简化和线性化,推导出变质心弹头关于攻角和侧滑角的传递函数,在加入舵机伺服系统后,分析变质心伺服系统的性能对弹头跟踪精度和弹道命中精度的影响,最终确定变质心执行机构的动态性能参数并为今后变质心执行机构的设计提供必要的参考。

Moving center of mass control for Reentry warheads are used to realize the maneuver control on the missiles and to promote the end-guidance accuracy by changing the center of mass of RV and aerodynamic trim moment, so as to adjust the flighting attitude and angle-of-attack. In this paper, on the basis of building up dynamic equations of the moving center of mass, this dynamic equationgs are simplified and linearized so that the transfer functions about attack angle and slippery angle can be deduced. Through analysing the effect of moving center of mass servo system＇s dynamic characteristic on follow and impaee accuracy of reentry warheads, we provide the necessary reference for design of moving center of mass servo system later by necessary dynamic parameter of servo system.