基于FFT算法的舰载导弹发射弹位影响研究

Analysis on the effect of shipborne missile launch position based on fast Fourier transform

针对发射精度问题,利用频谱分析技术研究了舰载导弹发射弹位的影响。基于修正的Craig-Bampton法和虚拟样机技术,建立了船舶运动和导弹发射刚柔耦合一体化模型。利用发射时间参数化脚本语言,实现了自动仿真,获取了大量工况下不同弹位的导弹出筒姿态,确定了恶劣发射弹位。基于快速傅里叶变换法(FFT)对导弹动力学响应进行了频谱分析,明确了发射弹位和发射精度的关系。依据研究结果,能够根据船舶的具体运动形式,设计武器系统放置的位置,同时也对发射时选择合适弹位具有指导意义。

In allusion to the problem of launching precision, the effect of shipborne missile launch position was analysed based on the modified Craig-Bampton method and the spectrum analysis technology. A rigid-flexible coupling integrative model of ship movement and missile launch was built by using the virtual prototype technology. Meanwhile, to get the missile muzzle attitude parameters at different launch position, the launch time parameterized scripting language was used. Finally, the spectrum analysis based on FFT was used to analyze the missile dynamic responses, and the relationship between launch position and launching accuracy was established. Through the study, the launching position of the weapon system can be designed according to the specific motion characteristics of a ship. Furthermore, the result is also constructive to the selecting of suitable launching position.