脱插机构的误差灵敏度分析与优化设计

Insert-draw sensitivity analysis based on the geometric error transformation model

本文通过建立发射箱脱插机构的几何误差传递模型,系统分析各组成零部件的加工装配误差对脱插机构空间误差灵敏度系数,确定脱插机构下连杆座与脱插机构基座之间、下连杆座与平动杆之间以及平动杆与上连杆座之间沿y轴方向的转动误差为关键误差来源,针对性地提出了改进措施并加以实施。最后,通过试验验证了误差灵敏度分析的有效性和改进措施的正确性。该方法为整个系统的误差优化分析提供了可靠的理论支撑,大幅度提高了脱插机构对接成功率。

In this paper,the geometric error transmission model of the launch canister's insert-draw is established,and the sensitivity coefficient of the processing and assembly errors of various components to the spatial error of the insert-draw is systematically analyzed.It is determined that the rotation errors between the lower connecting rod base and the insert-draw base,between the lower connecting rod base and the translational rod,and between the translational rod and the upper connecting rod seat along the y axis are the key error sources,and the improvement measures are put forward and implemented.Finally,the effectiveness of the error sensitivity analysis and the correctness of the improvement measures are verified by experiments.This method provides a reliable theoretical support for the error optimization analysis of the whole system,and greatly improves the docking success rate of the insert-draw.