基于气动参数辨识的弹道风速估计算法设计  

Estimation of Ballistic Wind Speed Base on Aerodynamic Parameter Identification

作　　者：张衍儒[1] 肖练刚[1] 张继生[1] 田丰[1] 陈昌[1] 

机构地区：[1]北京航天自动控制研究所,北京100854

出　　处：《航天控制》2014年第2期29-34,共6页Aerospace Control

摘　　要：首先介绍低空风分布,确定风速估算范围。然后,以射程预测为主要研究目标,通过弹上传感器信息分析飞行过程中的实时气动阻力,对比在无风条件下的气动阻力理论值,采用气动参数辨识算法实时估算纵向风的近似风速,从而提高射程预测的精度。估算过程中,采用最小二乘算法计算不同风速下的气动阻力系数常值项,利用迭代算法求取气动阻力系数常值项为理论值时所对应的设定纵向风,即实际纵向风的近似值。最后通过仿真试验给出了估算算法的分析结果,该算法可以实时估算风速用于射程预测,并具有运算速度快,计算负荷小等优点,适合于工程实际应用。In the predictive process, guided munitions needed analysis of ballistic wind speed to improve the impact point precision. This paper introduced the wind distribution to determine wind speed estimation range. Then, according to the wind tunnel experimental data, the aerodynamic reference value of standard model and ballistic aerodynamic drag model was used for aerodynamic parameter identification by using the least square algorithm. This paper used the iterative algorithm to compute the approximate value of longitu- dinal wind, and built range correction model. According to the simulation test results, this algorithm could be used in real time correction, it was also suitable for engineering application and had the advantages of fast computing speed and small computation load.

关 键 词：制导弹药 气动参数辨识 最小二乘算法 风速估计 

分 类 号：TJ412.1[兵器科学与技术—火炮、自动武器与弹药工程]