Influence and analysis of installation gap on mechanical test of servo actuator

Based on the study background of the fracture of the guide bearing of the actuator ball screw pair after the servo mechanism was subjected to mechanical vibration and impact environmental tests, a finite element model of the servo actuator was established, and product failure was analyzed using a combination of theoretical calculation and simulation analysis. Mechanism analysis used finite element analysis to calculate the response results of the actuator guide bearing under actual excitation response. The results showed that due to the installation gap at the connection between the actuator and the fixture, the mechanical response magnitude of the specimen during the test was too large and the bearing fracture occurred under the action of excessive radial load. By improving the test fixture, the test verification was completed.