摘要
头锥在空天飞行器气动外形的优化中起着重要作用,基于蜜蜂腹部的变体机制,设计了仿生变体头锥。利用X射线断层扫描技术和Amira软件对蜜蜂腹部分别进行全息无损扫描与三维重构,试验结果表明,相邻体节之间共有12束肌肉,通过等效将相邻体节间的生理结构演化为并联机构,利用基于螺旋理论的给定末端运动约束的型综合方法对上述机构进一步优化,根据变体头锥的技术指标,选择2(3-SPR)并串联机构作为变体头锥的变形驱动机构,并进行了运动学分析。利用扫描电子显微镜试验研究了节间褶的形态特征和分布规律,通过机构异化将其演化为锥面变胞折展机构。综合2(3-SPR)变形驱动并串联机构、锥面变胞折展机构和壳体,设计了具有分节结构的仿生变体头锥,以适应空天飞行器在不同飞行阶段的构型需求。
The nose cone of aerospace vehicle plays an important role in optimizing the aerodynamic configuration. A morphing nose cone is designed by mimicking the deformable mechanism of honeybee abdomen. The X-ray phase-contrast imaging technique and Amira software are used to perform the non-destructive scanning and three-dimensional reconstruction on the honeybee abdomen. Experimental results show that there are 12 bundles of muscles between the adjacent segments. A 2(3-SPR) parallel-serial driving mechanism is evolved from the intersegmental structures based on the screw theory and technical specifications, and the kinematic analysis is carried out. The folded intersegmental membrane is studied by using scanning electron microscope analysis technology and a conical metamorphic foldable mechanism is developed by integrating the metamorphic mechanism. Then, a segmental morphing nose cone is designed, which is assembled from 2(3-SPR) parallel-serial driving mechanism, conical metamorphic foldable mechanism and body wall. It is significant for the aerospace vehicle to meet the deformation requirements in different flight stages.
作者
梁友鉴
赵杰亮
阎绍泽
LIANG Youjian;ZHAO Jieliang;YAN Shaoze(Division of Intelligent and Biomechanical Systems,State Key Laboratory of Tribology,Tsinghua University,Beijing 100084;DFH Satellite Co.,Ltd.,Beijing 100094)
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2020年第5期47-54,共8页
Journal of Mechanical Engineering
基金
国家自然科学基金(51475258,51805293)
北京市自然基金(3184050)资助项目。
关键词
蜜蜂腹部
仿生变体头锥
并联机构
折展机构
变胞机构
honeybee abdomen
bionic morphing nose cone
parallel mechanism
foldable mechanism
metamorphic mechanism
