High-Reliable Design for Mechanical Environment Adaptability of Space Servo Mechanism

In order to ensure that the space two-axis servo mechanism can withstand the vibration environment during launch and the shock environment when pyrotechnic devices work at the early stage of entering orbit, the mechanical environment adaptability design of space servo mechanism, an important part of reliability design, is studied. The general design of the two-axis servo mechanism is introduced. Iterative optimization design of U-frame, shafting, hold-down and release device, which affect the mechanical properties of the servo mechanism, is carried out. Combining with static and dynamic simulation analyses, the stress distribution of the servo mechanism under different overload conditions and the mode of vibration of the combination of servo mechanism and payload are calculated. Finally, the anti-mechanical environment capability of the servo mechanism is verified by vibration test and unlocking shock test. The results show that the strength, stiffness, fundamental frequency and shock resistance ability of the space two-axis servo mechanism meet the task requirements. The servo mechanism has excellent mechanical environment adaptability.