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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。
Aimed at the initial disturbance of the rocket during the initial alignment, a new method for modeling and simulating the initial alignment of the wind disturbance is proposed, which can be used for the initial alignment simulation of the rocket disturbance. According to the characteristics of wind field and vibration theory, the vibration models of rocket body under ground wind and wind disturbance are respectively established, and the simulation of environment under swaying base and the simulation output of SINS measurement output are realized. The simulation results show that the vibration characteristics of the rocket body are consistent with the measured values. The output of the simulated group output agrees well with the rocket body shaking, which shows that the model is correct and effective. The proposed method can provide a more realistic data source for the initial alignment simulation in sloshing environment.