小口径枪榴弹尾舵滚转角变结构控制方法

Small Caliber Grenade Ammunition Tail Rudder Roll Angle Variable Structure Control Method

针对基于尾舵修正的小口径枪榴弹在飞行时间短、气动不确定因素较多,难以建立精确模型情况下的尾舵滚转角控制问题,提出基于变结构控制的小口径枪榴弹尾舵滚转角控制方法。该方法建立了存在气动干扰条件下小口径枪榴弹尾舵滚转角运动的状态空间模型,通过选取合适的切换平面与趋近律,设计了尾舵滚转姿态变结构控制器。仿真结果表明,所设计的变结构控制器初始响应抖振较小且控制精度更高,与传统PID控制方法相比,具有响应快、对参数变化及扰动变化不灵敏、无需系统在线辨识等优点,可实现对尾舵滚转角的精准控制,有效提高了打击精度。

In response to the problems of small caliber gun grenade based on tail rudder with short flight time,numerous aerodynamic uncertainties,and difficulty in establishing an accurate model.A variable structure control method was proposed.This method established a state space to describe the rolling angle motion of the tail rudder of small caliber gun grenades when exist aerodynamic interference,By selecting appropriate switching planes and approaching laws,a rolling attitude variable structure controller was designed,which had the advantages of fast response,insensitivity to parameter and disturbance changes,and no need for online system identification.The simulation results showed that,compared with traditional PID control methods,the designed variable structure controller had smaller initial response oscillations and higher control accuracy,and aiso had strong robustness,which effectively improving the strike accuracy.