质心位置偏移对导弹稳定回路的影响分析

Analysis of the Influence of Center-of-mass Position Deviation on the Missile Stability Loop

为解决导弹装配误差引起导弹质心位置偏移的问题,对弹体闭环稳定回路产生影响进行分析。根据弹体动力学方程,建立弹体响应特性的开环传递函数描述模型,利用角速率反馈结构和三回路过载反馈结构设计弹体稳定回路,并通过具体实例分析了2种闭环控制结构的鲁棒性。仿真结果表明:三回路过载反馈结构具有更强的鲁棒性,在导弹质心位置偏移5%的情况下动态特性变化很小。

In order to solve the problem of deflection of missile’s center of mass,which is caused by missile assembly error,the influence of missile body closed-loop stability loop is analyzed.According to the dynamics equation of the projectile body,the open loop transfer function description model of the projectile body is established,and the stability loop of the projectile body is designed by using the angular rate feedback structure and the three-loop overload feedback structure independently.The robustness of the two closed-loop control structures is analyzed for a specific design example.The simulation results show that the three-loop overload feedback structure is more robust and the dynamic characteristics change little when the position of the missile’s center is shifted by 5%.