摘要
在航天侦察系统中,由于光学系统的视场角较小,难以满足系统宽覆盖范围的要求,所以往往采用指向摆镜,并绕两轴连续地或间歇地摆动来对地面不同位置的目标进行观测。但是由于空间工作环境会使光学指向摆镜的形状及内部应力发生变化,进而会对其光学特性产生明显的影响,因此对它进行工程分析就显得尤为重要。运用有限元法,对轻量化后的碳化硅指向摆镜在不同加速度条件下的面形和内部应力的变化作了研究和分析,同时对轻量化后的碳化硅指向摆镜在不同的温度场中的面形和内部应力的变化也作了研究和分析,为侦察系统的光学设计和结构设计提供了一些可供参考的数据。
The small angel of view limits the covering range of the space scouting system, so it can not satisfy the requirements of application. A swaying mirror, which can sway around two axis continuously or intermittently, is applied to observe targets located differently on the ground. Due to the variations of the space working condition, the shape and inner stress of the mirror will also change, and then the optical character might be influenced seriously. Therefore it is very important to make an engineering analysis for the mirror. FEA (finite elements analysis) method is used here to analysis the shape and inner stress of the swaying mirror made of SiC, not only under conditions with different accelerations, but also in different thermal field. Some useful data can help to design the optics and structure system in the space scouting system.
出处
《光学技术》
EI
CAS
CSCD
2003年第4期387-390,共4页
Optical Technique
