摘要
针对火箭初始对准时存在外界扰动,提出一种适用于风扰动的初始对准环境建模与仿真方法,可用于运载火箭扰动环境下初始对准仿真验证。根据风场特性和振动理论,分别建立了地面风和风干扰下的箭体振动模型,实现了晃动基座下的环境仿真和对捷联惯组测量输出的模拟。仿真结果显示,箭体振动特性与实测值一致,所模拟的惯组输出与箭体晃动吻合,表明模型正确有效。该方法能够为晃动环境下初始对准仿真研究提供更加符合实际特性的数据源。
Aiming at the wind disturbance of launch vehicle, a method of environment modeling and simulation is proposed for initial alignment simulation on rocking base. According to the wind characteristics and vibration theory, the ground-wind model and vibration model are built to realize the simulation of rock- ing environment and strapdown inertial measurement unit （ IMU ） outputs. The results show that the vibra- tion characteristics is consistent with measured data and the IMU outputs tally with vibration, which indi- cates the validity of models. The data provided is more similar to reality for initial alignment on rocking base by this method.
出处
《航天控制》
CSCD
北大核心
2013年第3期30-33,39,共5页
Aerospace Control
关键词
初始对准
环境建模
地面风
振动
捷联惯组
Initial alignment
Environment modeling
Ground-wind
Vibration
Strapdown IMU
