After undergoing mechanical environmental testing(vibration,shock)on the servo actuator,the product performance retested showed abnormal vibration.It was found that the guide bearing installed on the actuator's ball screw pair had broken.The problem affects product reliability.By combining theory with finite element simulation,a failure mechanism analysis was conducted.The analysis showed that there was a gap at the installation connection between the actuator and the test fixture,causing the actual response magnitude of the guide bearing to be amplified during the test.The bearing broke due to excessive radial load.Based on the analysis results,optimize the design of the test fixture and successfully pass the vibration and shock test assessments.Through the research methods and results of this article,it has certain engineering guidance significance for designing such actuators for mechanical environmental testing and analyzing the actual excitation response of the product.
维普
万方数据