基于模型重构的变形叶片配准定位技术

叶片毛坯的精确定位是叶片数控加工的核心问题,为了提高叶片数控加工质量,保证叶片各处余量分配均匀,本文以叶片进排气边的自适应数控加工中的检测定位为研究对象,提出了一种基于模型重构的配准定位方法.该方法利用偏置模型的叶片测量方式提高了测量精度,对基于重构的测量模型进行变形与定位分析,得出较优的定位参数.通过仿真试验和对比分析,论证了本文方法的正确性.     

Modularity,reconfigurability, and autonomy for the future in spacecraft: A review

The shape of a spacecraft is transitioning from monolithic, manual, and static to modular, autonomous, and dynamic. Modular Reconfigurable Spacecrafts (MRSs) offer better solutions than traditional monolithic spacecrafts in several aspects, and may become the next generation of spacecraft systems with efficient design, fast deployment, flexible application, and convenient management. This paper reviews the development and technology of MRS from three aspects: Modularity, reconfigurability, and autonomy. Despite the progress of research on MRS, there is still a lack of unified standards and little understanding of related concepts. Based on the understanding of basic concepts, the studies conducted on MRS are reviewed to identify technical requirements and solutions. Aiming at the future development trend of MRS, a novel modular self-reconfigurable spacecraft, referred to as MagicSat, is proposed. Furthermore, the MagicSat system composition, advantages, and application prospects are studied. The enabling technologies and major challenges of MRS are further analyzed in terms of modularization, integrated management, and self-reconfiguration technologies. Finally, the future development trend of MRS technology is predicted, and corresponding suggestions are provided.     

基于形状记忆聚合物复合材料航天航空可变形结构技术研究进展

形状记忆聚合物及其复合材料是一种在相应的外界刺激下可以在临时形状和初始形状之间进行切换的智能材料,具有低密度、低成本、可回复变形大,刺激方式可控等优点,在航天航空领域,如:空间可展开结构、锁紧释放机构、变体等,展现出来了巨大的应用潜力.这些应用大多处于开发阶段,一部分完成了地面功能验证,少部分进行了航天实验.本文首先总...