Dynamic simulation of the vibration isolation system for astronaut treadmill

Abstract

When the astronauts are running on the astronaut treadmill for healthy exercise, their impact force will have serious disturbances on almost all the on-orbital science experiments. To solve this problem, a parallel passive vibration isolation system is designed for the astronaut treadmill. The proposed passive vibration isolation system can also restrain the high-frequency disturbance aroused from the astronauts' intra-vehicular activities. Based on the vibration isolation theoretical analysis, a 6-degree of freedom dynamic model of the passive vibration isolation is developed. And then different vibration isolation system layouts are designed and compared. By using the Matlab/Simulink tools, passive vibration isolation performances are analyzed with comparison. As a result, the vibration isolation system parameters are optimized to improve the isolation system's performance.