Design of a Wideband Parallel Vibration Isolation System for Spacecraft Control Moment Gyroscope
A novel concept and mechanical model of a broadband damper using bellow and fluid damping have been proposed,and a pro-totype of the damper has been designed.This damper features several frequency selective valves designed to adjust its damping characteristics within specific frequency ranges,particularly in the low-frequency band,thereby achieving variable hydraulic damping.Additionally,a specially designed machined spring with a clearance element has been used as a secondary stiffness to achieve variable stiffness.By using this kind of damper,a broadband parallel vibration isolation system has been designed for the Control Moment Gyroscope(CMG)which would experience complex environments in a large manned spacecraft.The obtained vibration isolation system is not only capable of securely fixing the CMG and thus improving reliability during launching,but also capable of efficiently alleviating unlocking impact energy and sup-pressing micro-vibration of the CMG on-orbit.The designed damper and parallel vibration isolation system provide a broadband vibration isolation solution with variable damping and variable stiffness for the CMG used in the spacecraft,thus,the performed designs have laid a foundation for next step works.
Damper using bellow and fluid dampingBroadbandFrequency selective valveSpacecraftCMGVibration isolation
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