一种航天伺服作动器载荷试验台的结构设计

Structure Design of Load Test Bench for Aerospace Servo Actuator

为了对航天伺服作动器的效率、寿命和承载能力进行检测,根据航天伺服作动器的传动特性、机械特征和指标要求确定试验台方案,设计试验台机械结构和关键零部件。增设滚珠弹簧夹块结构补偿安装和运行过程中连接件可能产生的变形,使用直线导轨实现对多尺寸作动器的通用检测,对丝杠与丝杠轴承进行寿命适配选型以方便后续检修和维护。使用ANSYS Workbench对关键零部件进行校核,根据刚度要求和精度要求调整、优化试验台的机械结构,通过计算及仿真验证了试验台设计的可行性。

To test the efficiency, life span and carrying capacity of aerospace servo actuator, the test bench plan is determined and the mechanical structure and key components of the test bench are designed according to the transmission characteristics, mechanic features and index requirements of the aerospace servo. The ball spring clamp structure is added to compensate the possible deflection and deformation of the connecting parts during installation and operation. The linear guide rail is used to realize the universal detection of multi-size actuators. The life-span adaptation and selection of the lead screw and lead screw bearing are carried out. ANSYS Workbench is applied to check the key components, adjust and optimize the mechanical structure of the test bench in line with the requirements of rigidity and accuracy. The feasibility of the test bench structure is verified by caculation and simulation.