脉冲修正弹药动态稳定性分析

为保证脉冲修正弹药控制系统的鲁棒性,分析研究了基于脉冲发动机直接力控制的2维修正弹药的飞行动态稳定性,建立了弹体六自由度模型和传递函数模型,求出弹体在受脉冲力扰动时弹体攻角变化,以此分析弹体动态稳定性.分析了单台发动机总冲、发动机推力轴心与质心距离、弹体静稳定裕度以及发动机连续工作个数等影响弹体动态稳定性因素,仿真结果表明,发动机位置距离质心越近,发动机冲量越大,静稳定裕度越大,脉冲修正弹药动态稳定性越好.

Analysis of the Dynamic Stability of Pulse Correction Projectile

In order to ensure the robustness of control system of Pulse Correction Projectile(PCP),the flight dynamic stability of two-dimensional PCP based on direct power control of pulse engine was analyzed.Six-degree-of-freedom model and transfer function model were established.The changes of attact angle of projectile disturbed by pulse power were obtained for analyzing the system stability.The factors affecting the dynamic stability of projectile,such as total moments of one engine,distance between axis center of the power and centroid,static stability margin of the shell and the number of continuous working engines,were analyzed.The simulation result shows that the smaller the distance between engine position and centroid,the larger the engine impulse and the static stability margin are,and the better the stability of PCP is.