论文部分内容阅读
为了实现高精度的运动学支撑结构的设计,研究了切向双脚架-运动学支撑结构的柔度。介绍了切向双脚架-运动学支撑结构的设计原理。根据单边直圆柔性铰链的柔度公式,推导了双脚架在X、Y和Z轴方向的等效柔度Cx、Cy和Cz的解析式。采用有限元分析和试验验证的方法,对双脚架的柔度解析式进行了分析验证。结果表明:解析式结果与有限元结果、试验结果基本一致,且误差均小于9.8%。研究了单边直圆柔性铰链的柔槽深度R和最小厚度t对双脚架柔度Cx、Cy和Cz的影响,得到了双脚架的等效柔度均与柔槽深度R成正比,与最小厚度t成反比的结论。为空间相机上的科学仪器的切向双脚架-运动学支撑结构的设计提供理论参考。
In order to realize the design of high-precision kinematic support structure, the flexibility of the tangential bipod-kinematic support structure is studied. Introduced the tangential bipod - kinematics support structure design principles. According to the flexibility formula of the unilateral straight circular flexible hinge, the analytic formulas of the equivalent compliance Cx, Cy and Cz in the X, Y and Z axes of the bipod are deduced. Finite element analysis and experimental verification methods were used to analyze and verify the compliance analysis of the bipod. The results show that the analytical results are consistent with the finite element results and the experimental results, and the errors are less than 9.8%. The influence of the depth R and the minimum thickness t of the flexible straight hinges on the compliance of the bipod Cx, Cy and Cz are studied. The equivalent compliance of the bipod is obtained, which is proportional to the depth R, And the minimum thickness t is inversely proportional to the conclusion. It provides theoretical reference for the design of kinematic support structure for the tangential bipod of scientific instrument on space camera.