摘要
太赫兹频段的微波探测仪对冰云的有效探测将极大地促进全球和局部气候研究,但成像仪内部空间狭小,结构设计难度较大,且单机布局紧凑、功耗较大,太空环境与太阳直照会使天线反射面结构变形,从而影响载荷电性能。文中对成像仪系统进行了详细的结构设计,运用有限元软件验证其在各试验工况下的力学特性,并对载荷温度进行在轨计算,将温度数据映射到模型中进行热变形计算,将结构热变形数据代入Grasp系统仿真。通过耦合分析,评估天馈系统结构热变形对其电性能的影响,结果表明电性能指标均满足设计要求。
Efficient detection of ice cloud by the microwave detector in the terahertz band will greatly facilitate global and local climate research. However, due to the small internal space, the structure design of the imager is difficult. The layout of the electric machine is compact and the power consumption is large. The space environment and direct sunlight will cause the structural deformation of the antenna reflection surface, which affects the electrical performance of the load. The imager structure is designed in detail and its mechanical characteristics under various experimental conditions are verified by finite element software. Temperature data of space system is mapped to the model for thermal deformation calculation, then structural thermal deformation data is translated into Grasp system simulation. The effect of the thermal deformation on the electrical performance is evaluated based on coupling analysis. The result shows that the electrical performance meets the requirements.
作者
葛如飞
李孚嘉
钱志鹏
黄佳雷
李宁杰
GE Rufei;LI Fujia;QIAN Zhipeng;HUANG Jialei;LI Ningjie(Shanghai Aerospace Electronic Technology Institute,Shanghai 201109,China)
出处
《电子机械工程》
2022年第3期18-21,共4页
Electro-Mechanical Engineering
基金
国防科工局民用航天十三五预先研究项目(D040110)。
关键词
太赫兹微波成像仪
结构设计
力学分析
耦合分析
terahertz microwave detector
structure design
mechanics analysis
coupling analysis
