Long-life Design and Verification of Flexible Actuator for Ultra-quiet Platform

The service life and reliability of the satellite payload are determined by the service life of the flexible actuator of the ultra-quiet Platform, so the long-life design of the flexible actuator must be carried out. Based on the finite element software, multi-objective and multi parameter optimization design is carried out for the key components of flexible actuator life, and the optimal configuration parameters of the components are determined. The motion load spectrum acting on the flexible element is obtained according to the decomposition of the maneuver curve of the actuator. Based on the material fatigue life curve and fatigue cumulative damage theory, the fatigue life damage of flexible components is evaluated. A loading spectrum for the life test of flexible components is designed, and accelerated fatigue testing of parts is carried out based on the loading spectrum to verify the fatigue life design method of flexible components. The verification results show that the proposed long-life design method can accurately evaluate the fatigue life of flexible elements, and the design life of flexible actuators can meet the requirements of the satellite for life.