单通道鸭舵控制的弹道修正火箭弹传递函数研究

Study on Transfer Functions of Canard Trajectory-corrected Rocket With Single Channel Control

为更好地对弹道修正技术的制导控制进行研究,以弹道修正火箭弹的传递函数为研究对象,重点解决弹道变化量与控制变量的传递关系,实现对弹道偏差量的准确反馈;根据弹道扰动方程和自动控制理论,结合比例导引算法,求解出单通道鸭舵控制弹道修正火箭弹的传递函数;采用传递系数对弹道倾角变化量与舵偏角度的关系进行了解析,在理论上分析了影响弹体传递系数的主要影响因素。通过仿真验证分析了不同的影响因素下传递系数的变化。结果表明:理论分析是正确的,不同舵机结构传递系数的主要决定因素是舵片的布局和结构,不同飞行弹道下传递系数的主要决定因素是空气密度,为制导控制系统的设计与优化提供良好的理论支持。

To study the guidance and control system of trajectory-corrected rocket,the transfer functions was taken as study object ,and the relationship between control parameters and trajectory variations was obtained to accurately conduct the feedback of trajectory deviation .Based on trajectory disturbance equations,automatic control theory and the proportional guidance method , the transfer functions were solved.The relationship between trajectory slope-angle variation and deflection-angle was analyzed by transfer coefficient ,and the main factors affecting the transfer coefficient were analyzed theoretically .The variation of transfer coefficient under different effect factors was compared .The result shows that the main factors affecting the transfer coefficient under different structures are the layout and structure of nub ;the factor affecting the transfer coefficient under different flight states is air density .The analysis offers theoretical support for optimization of the guidance and control system .