摘要
空空导弹在飞行的过程中,由于弹体弹性模态时变特性而引起幅值滤波器参数无法预先精确设置,导致滤波器滤波效果减弱。针对这一问题,本文首先建立了空空导弹的纵向刚体和弹性体混合数学模型,在此基础上,借鉴最小二乘法在线估计弹性模态参数的方法,提出了广义最小二乘法在线估计的改进措施,解决了弹体弹性模态求解过程中由于扰动等因素带来的有色噪声干扰问题。同时,在控制系统结构中引入振荡模态角频率反馈模块,实时修正滤波器中心频率,提高了滤波效果。通过六自由度仿真算例验证该方法的可行性。
During the flight of air-to-air missiles,the amplitude filter parameters cannot be accurately set in advance due to the time-varying characteristics of the elastic modality,which leads to the problem that the filtering effect is weakened.In response to this problem,this paper establishes a mixed mathematical model of the longitudinal rigid body and elastic body of air-to-air missiles firstly.Then,based on the method of online estimation of elastic modality parameters by least square method,the improved mea-sure of online estimation by generalized least square method is proposed,which solves the problem of co-lored noise interference caused by disturbance.At the same time,the oscillating modality angular frequency feedback module is introduced into the control system structure to correct the filter center frequency in real time and improve the filtering effect.The feasibility of the method is verified by a six-degree-of-freedom simulation example.
作者
李良
李友年
陈星阳
Li Liang;Li Younian;Chen Xingyang(China Airborne Missile Academy,Luoyang 471009,China)
出处
《航空兵器》
CSCD
北大核心
2020年第1期46-51,共6页
Aero Weaponry
关键词
幅值滤波器
广义最小二乘法
在线估计
弹性模态
amplitude filter
generalized least square method
online estimation
elastic modality
