摘要
面向星载大口径薄膜天线在轨展开需求,开展高型面精度、大口径、轻量化和大折展比的空间薄膜天线人形杆折展机构创新设计及其动力学特性研究。提出一种带有径向预紧的人形杆单侧驱动机构,通过一个电机同时驱动滚筒和丝杠运动,当人形杆完全展开时径向预紧机构得到触发,实现人形杆根部的夹紧,从而提高整个薄膜天线展开状态的刚度和型面精度。对该机构缠绕过程的运动学和收拢状态的动力学分别进行仿真;加工出人形杆单侧驱动机构原理样机,对其收拢和展开进行功能性试验,测量在缠绕过程中人形杆的力矩,并对单侧驱动机构收拢状态整体结构进行模态分析。经试验验证,缠绕过程中有限元仿真模型力矩的准确性,为空间大型轻质薄膜天线人形杆展开机构的航天工程应用提供理论支撑。
Here, to meet the on-orbit deployment requirements of spaceborne large caliber thin film antenna, the innovative design and dynamic characteristics of triangular retractable and collapsible(TRAC) boom folding mechanism of space thin film antenna with high profile accuracy, large caliber, lightweight and large folding ratio were studied. Firstly, a one-sided driving mechanism of TRAC boom with radial preload was proposed. Rotary drum and guide screw were driven by a motor at the same time. When the TRAC boom was fully deployed, the radial preloading mechanism was triggered to realize clamping of the root of TRAC boom, and improve stiffness and profile accuracy of deployment state of the whole thin film antenna. The kinematics of the mechanism’s winding process and the dynamics of the mechanism’s retracted state were simulated, respectively. Finally, the elementary prototype of the one-sided driving mechanism of the TRAC boom was fabricated, the functional tests were conducted for its retraction and deployment, the torque of the TRAC boom in wrapping process was measured, and the overall structure modal analysis of the one-sided driving mechanism in retracted state was done. Moment accuracy of its finite element simulation model in wrapping process was verified with tests to provide a theoretical support for aerospace engineering application of TRAC boom deployment mechanism of spaceborne, large scale, lightweight thin film antennas.
作者
王岩
杨慧
刘荣强
WANG Yan;YANG Hui;LIU Rongqiang(College of Mechanical Engineering,Yanshan University,Qinhuangdao 066004;State Key Lab of Robotics and System,Harbin Institute of Technology,Harbin 150001,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2022年第5期27-32,共6页
Journal of Vibration and Shock
基金
安徽省自然科学基金资助项目(2108085QE221)
国家自然科学基金资助项目(51975001,51835002)
机器人技术与系统国家重点实验室开放研究项目(SKLRS-2020-KF-16)。
关键词
可展开机构
人形杆
动力学
运动学
复合材料
有限元
deployable mechanism
triangular retractable and collapsible(TRAC)boom
dynamics
kinematics
composite material
finite element
