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球铰接杆式支撑臂的构型参数设计决定了支撑臂的质量、收拢包络尺寸、刚度和强度等特性。文章提出了一种基于球铰接杆式支撑臂展开后比刚度最大的构型参数设计方法,利用MATLAB和ANSYS联合仿真,分析了不同构型参数组合下支撑臂比刚度的变化规律。结果表明,对于20～100m范围内的球铰接杆式支撑臂,纵梁与横杆的长度比及套筒半径的优选范围随支撑臂总长度增加而增加。当支撑臂总长度分别为20m、60m和100m时,对应的套筒半径优选范围分别为0.3～0.4m、0.5～0.7m和0.6～0.9m。提出了基于比刚度最大的支撑臂参数设计流程。利用提出的设计方法对SRTM任务中球铰接杆式支撑臂进行了构型参数设计,设计结果与ADAM杆构型参数相近,表明设计方法正确、可行。
The design parameters of the ball-hinged rod support arm determine the quality of the support arm, the size, stiffness and strength of the retractable envelope. In this paper, a design method of configuration parameters based on maximum stiffness ratio of ball-and-rod-type support arms is proposed. By using MATLAB and ANSYS co-simulation, the variation law of specific stiffness of support arms under different combinations of configuration parameters is analyzed. The results show that for the ball-hinged rod-type support arm in the range of 20-100 m, the ratio of the length to the length of the beam to the radius of the sleeve increases with the total length of the support arm. When the total length of the support arm is 20m, 60m and 100m respectively, the corresponding radius of the sleeve is 0.3 ~ 0.4m, 0.5 ~ 0.7m and 0.6 ~ 0.9m respectively. Proposed based on the stiffness ratio of the maximum support arm parameter design process. The proposed design method was used to design the spherical articulated rod supporting arm in the SRTM mission. The design results are similar to the ADAM rod configuration parameters, which shows that the design method is correct and feasible.