Design of multi-degree of freedom mechanism in vacuum and low-temperature environment

Abstract

In order to simulate the on-orbit state of the spacecraft more truly, the motion mechanism is usually used to adjust the position and posture of the specimen during the space environment test. This requires that the motion mechanism can operate reliably in vacuum and cryogenic environment. In this paper, the structure design of a five-degree of freedom motion mechanism in vacuum and low-temperature environment is presented. Through special selection, vacuum lubrication and local thermal control, the problem of adaptability design of the motion mechanism in vacuum and low-temperature environment is solved. Experiments show that the design method can ensure the normal operation of the motion mechanism in vacuum and low-temperature environment with of $5 \times 10^{-4} \mathrm{Pa}$ and $-196^{\circ} \mathrm{C}$. The results can provide reference for the design of motion mechanism under similar vacuum and low-temperature environment.