利用根轨迹法对变质心控制旋转导弹的稳定性进行分析 ,给出了变质心控制导弹稳定的充分必要条件 .针对弹体参数大范围剧烈变化的特点 ,根据 H∞ 控制理论 ,设计了 H∞ 状态反馈鲁棒控制器 .大大减小了弹体自身参数变化对制导系统性能的不良影响 ,从而提高了弹体的抗干扰性能 The stability of the modified centroid-controlled missile is analyzed by root locus method, and the sufficient and necessary conditions for the stability of the modified centroid-controlled missile are given.According to the characteristics of large-scale and violent changes of projectile parameters, according to the H∞ control theory, the H∞ State feedback robust controller greatly reduces the adverse effect of the change of the projectile’s own parameters on the performance of the guidance system and thus improves the anti-jamming performance of the projectile