Structural Design and Random Vibration Analysis of a High-Stability Momentum Wheel

A novel expandable wheel body assembly is designed in this paper. The wheel body assembly utilizes the elastic deformation of the hub clamp the bearing assembly. The gaps between them are effectively eliminated by this structure, improving the rotational precision and operational stability of the momentum wheel. A finite element model of the momentum wheel was established, and stress analysis was conducted under constant acceleration using finite element analysis software ANSYS. The results demonstrate that the designed momentum wheel meets the required strength specifications. Additionally, the random vibration characteristics of the momentum wheel in space environments were analyzed, and a random vibration test study was conducted. The results indicate that this new type of momentum wheel can work reliably in aerospace conditions.