推力矢量防空导弹伺服弹性的抑制

大长径比，低弹性频率的推力矢量控制导弹，由于其喷管摆动形成的惯性力对弹性模态产生激振，使弹体控制中存在伺服弹性问题.为了解决该问题，对摆动喷管控制下的弹性弹体模型进行了分析，针对弹性模态对控制系统的影响途径，提出了双传感器布局及测量信号预综合的方法.在此基础上，基于Steiglitz-McBride系统辨识方法，设计一种自适应噪声抑制滤波器对测得信号中的弹性分量进行处理，取得导弹刚体运动的有用信号.仿真证明该方法有效提高了控制系统对弹体弹性特征变化的适应性.双传感器的使用也增加了测量及滤波系统的可靠性.

Suppression of aeroservoelasticity in anti-aircraft missile using thrust vector

Anti-aircraft missile are always designed with large aspect ratio,which has low body flexible frequency. Besides, nozzle swing would increase the vibration of missile body. To eliminate this effect, the article analyzed the relationship between the vibrations and control system. Based on modeling of flexible missile, it proposed the layout of the dual sensor plan and the way of pre-integrating for signal preprocessing. Using a new adaptive notch filter basing on Steiglitz-McBride, the useful signal could be got from the rigid body motion of the missile. In this way, the control system would have more flexibility and adaptability while dealing with the aeroservoelasticity. What's more, the layout of dual sensor would increase the reliability of measure and filter at the same time.