对地观测敏捷小卫星星载一体化结构设计

Spaceborne integration design of smart small earth observation satellite structure

研究了对地观测敏捷小卫星的星载一体化设计,结合工程实际,设计了一种敏捷小卫星的结构,将载荷结构和卫星结构有机结合到一起,并充分考虑了卫星结构与整星被动热控一体化设计、卫星结构与整星线缆布局一体化设计,提高整星的功能密度,优化了星上单机布局,有效降低整星质量,压缩体积,降低发射成本。设计分析结果表明,整星的x向固有频率为56.465 Hz,y向固有频率为59.704 Hz,z向固有频率为218.88 Hz,整星的高刚度为敏捷卫星的快速机动成像奠定基础;卫星的结构安全裕度大,达到3.85,随机响应和正弦响应在可控范围内,能承受卫星从运输到发射过程中的各种复杂力学环境;卫星功能密度高,被动热控设计使得整星热控资源功耗小,空间利用率高,线缆走线布局简洁方便。

The space to earth observation small satellite borne smart integration design was studied,combined with the engineering practice, the structure design of a dexterous small satellite. The organic combination of load structure and satellite structure together, and full consideration was given on the integration of design, structure and layout of the whole satellite cable, satellite integrated design of satellite structure and the entire star passive thermal control, the function density of the whole satellite was improved, onboard single computer layout was optimized, the entire star quality was effectively reduced, compression volume, and lower launch costs application were completed. Design and analysis results show that, the natural frequency of the entire star x is 56.465 Hz, the natural frequency of y is59.704 Hz, the natural frequency of z is 218.88 Hz, the whole star high stiffness lay the foundation on fast mobile imaging smart satellite; large safety margin is reached 3.85 with random response and sine response in the controllable range, can withstand complex mechanical environment from transport to various emission process; satellite high functional density, passive thermal control design makes the whole satellite thermal control resources small power consumption with high space utilization rate, simple and convenient cable layout.