论文部分内容阅读
针对大口径和超大口径天线的刚度随其口径增大逐渐减弱的问题,该文设计了双环可展开天线桁架机构。分析了该机构的基本展开单元和机理,推导了可展开条件公式。在单环基础上,推导出双环可展桁架的约束方程;基于广义逆矩阵方法建立双环可展桁架的运动学基本方程,并进行双环可展桁架的运动学仿真。将同口径下单环和双环可展开天线桁架进行动力学对比分析,发现双环可展桁架的刚度比同口径单环可展桁架明显增强。采用设计制作的2 m原理样机缩比模型验证了双环可展开天线桁架的可展开性,对2m模型进行的动力学测试验证了分析结果的正确性。
Aiming at the problem that the stiffness of large-diameter and large-diameter antennas decrease gradually with the increase of their caliber, a double-loop deployable antenna truss mechanism is designed. The basic unit and mechanism of the mechanism were analyzed, and the formula of expandable condition was deduced. On the basis of single ring, the constraint equations of double loop deployable truss are deduced. Based on the generalized inverse matrix method, the kinematics basic equations of double loop deployable truss are established and the kinematics simulation of double loop deployable truss is carried out. The dynamic contrast analysis of single-loop and double-loop deployable antenna trusses under the same caliber shows that the rigidity of double-loop stretchable truss is obviously higher than that of single-loop deployable truss with the same caliber. The scalability of the double loop deployable antenna truss was verified by the 2 m prototype prototype designed by this model. The dynamic test on 2m model verified the correctness of the analysis results.