摘要
采用大长细比、轻结构质量设计方案的固体运载器结构刚度较小,姿态控制系统设计需要考虑弹性振动的影响。设计了自适应滤波器实现对箭体弹性振动信号的抑制:将滤波器参数自适应问题转化为系统参数辨识问题,通过Steiglitz-McBride参数辨识方法求解,该方法具有计算复杂性低、收敛迅速等特点,适用于箭上计算机实时计算。通过闭环仿真表明,在箭体弹性频率发生变化的条件下,具有自适应滤波器的控制系统能够跟踪这种变化,有效抑制振动信号对控制器的影响,保持运载器姿态运动稳定。
An adaptive notch filter design that considers the body-bending vibration associated with the attitude control of a solid launcher is discussed.The problem of obtaining a notch filter from a given signal was first formulated as the conventional problem of system identification.Then the proposed adaptive notch filter was developed via the algorithm of Steiglitz-McBride.The new adaptive notch filter exhibits fast convergence speed and an excellent capability to frequency tracking in signals.Applying this adaptive notch filter to the launcher results in stable response characteristics of the attitude control system,which is unstable without adaptation.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2010年第5期44-48,共5页
Journal of National University of Defense Technology
关键词
固体运载器
姿态控制
弹性
自适应陷波器
solid launcher
attitude control
flexible
adaptive notch filter
