不同星箭分离方式下整星冲击环境特征分析

Pyrotechnic Shock Environment in Pyro-shock Separation of Different Rocket-Satellite Separation Manners

目的研究不同星箭分离方式下卫星的冲击环境特征。方法分析采用点源、线源和组合源火工装置完成星箭分离的卫星整星级冲击试验中不同位置测点加速度的实测值,研究其时域谱、频域谱和冲击响应谱特征,对不同星箭分离方式下整星冲击环境特点进行总结。结果三种分离方式下单位长度冲击响应的衰减率均在60%~70%之间。从频谱特点上来说,点源引起的冲击响应频率成分最为丰富,线源和组合源的功率谱分布相对集中。结论不同星箭分离方式下整星的冲击环境有一定的区别,在进行卫星抗冲击设计时,应考虑分离方式的不同。

Objective To study the pyrotechnic shock environment of different pyro-shock separation manners. Methods Pyro-shock accelerations measured at different locations on satellites with different separation pyrotechnic devices, including point source devices, line source devices and combined source devices, were analyzed. Time domain, frequency domain and shock response spectrum of the measured accelerations were studied and the features of different satellites pyro-shock environment were summarized. Results The satellite SRS peak value attenuation ratio in three different separation manners was between 60%~70%. The power spectrum of the shock response induced by point source devices was richer than that of the other two devices. The Power spectrum distribution of line source devices and combined source devices was relatively concentrated. Conclusion The satellite pyro-shock environment of different separation manual is different to a certain extent. The separation manners should be taken into consideration in anti-shock design of the satellite.