论文部分内容阅读
为了满足空间太阳望远镜的技术要求,进行了铍摆镜研制,掌握了高精度铍镜研制技术路线。光学检测面形精度RMS为0.012λ,满足技术要求。对铍摆镜结构进行优化设计改进。介绍了铍摆镜结构优化方法,用ANSYS中的APDL语言编译了摆镜结构优化程序,进行了铍摆镜结构优化。并利用Matlab软件编写了改进遗传算法组合优化程序,再次完成了铍镜结构优化,并进行了横向对比分析。结果表明:两结果都满足技术要求。以扇形孔铍摆镜为例,改进的遗传算法组合方法的优化结果(RMS,1.470E-6mm)比ANSYS零阶优化方法的优化结果(RMS,2.099E-6mm)降低了29.96%,优于铍镜检测结果,说明改进后的摆镜结构方案可行。铍镜的成功研制,为我国空间天文仪器大口径铍镜研究和应用奠定了基础。组合优化方法结合了改进遗传算法和ANSYS软件的优势,具有适应性高、优化能力强等特点,具有较好的鲁棒性,对类似工程结构或天文仪器结构优化具有一定的借鉴意义。
In order to meet the technical requirements of the space solar telescope, we developed the beryllium pendulum mirror and mastered the technical route of high-precision beryllium mirror development. Optical detection surface accuracy RMS 0.012λ, to meet the technical requirements. Optimize the design of the beryllium pendulum mirror structure. The method of optimizing the structure of beryllium pendulum was introduced. The structure optimization program of the pendulum was compiled by the APDL language in ANSYS, and the structure of the beryllium pendulum was optimized. The software of Matlab was used to write the improved genetic algorithm combinatorial optimization program. The structural optimization of the beryllium mirror was completed again and a horizontal comparison analysis was carried out. The results show that: Both results meet the technical requirements. Taking fan-shaped beryllium pendulum mirrors as an example, the optimized result (RMS, 1.470E-6mm) of the improved genetic algorithm combination method is 29.96% lower than the optimization result of ANSYS zero-order optimization method (RMS, 2.099E-6mm) Beryllium mirror test results, indicating that the improved structure of the practical structure of the mirror feasible. The successful development of the beryllium mirror lays the foundation for the research and application of large aperture beryllium mirrors for space astronomical instruments in China. Combining with the advantages of improved genetic algorithm and ANSYS software, the combinatorial optimization method has the characteristics of high adaptability and strong optimization ability, and has good robustness. This method is of certain reference significance to similar engineering structure or astronomical instrument structure optimization.