卫星运输过程振动信号正弦等效分析方法

Sinusoidal equivalent method for analyzing vibration signals in satellite transportation

  • 摘要: 以卫星运输过程中的最大加速度幅值作为减振指标不能全面反映卫星受载情况。文章运用峰值等效原理,将运输振动信号转换为等效的正弦振动信号,然后将之与卫星验收级正弦振动试验响应结果进行对比,得出卫星运输过程对减振指标的具体要求。结果表明:运用振动信号正弦等效的分析方法物理意义明确,能够有效表征卫星在运输过程中经受的力学环境,可为卫星结构及包装箱减振系统的设计提供更明确的依据。对包装箱进行设计时,也可采用文中所述方法对卫星安装界面处所受合力和合力矩进行计算,使其不超过卫星验收级正弦振动试验的量级。

     

    Abstract: Using only the maximum acceleration amplitude during satellite transportation as a damping indicator cannot fully reflect the loading conditions of satellites. The peak equivalence principle was utilized to convert a transportation vibration signal to an equivalent sinusoidal vibration signal. Then, the converted sinusoidal vibration signal was compared with the response results of the satellite acceptance-level sinusoidal vibration test to obtain specific requirements for the damping indicator during satellite transportation. The results show that the sinusoidal equivalent analysis method has a clear physical meaning and may be able to effectively characterize the mechanical environment experienced by satellites during transportation. Thus, the proposed study may provide a basis for the design of satellite structures and packaging box dampers. When designing boxes for packaging satellites, the method described in this article can also be applied to calculate the resultant force and moment at the satellite docking interface, to ensure that they do not exceed the magnitude of those in the satellite acceptance-level sinusoidal vibration test.

     

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