Space Science Experiments Cabinet Passive Damping System Design

The second phase of the manned space flight project will develop manned spacelabs for a series of space scientific experiments. Vibration isolation system isindispensable for both International Space Station and Shenzhou spaceship to satisfythe requirement of scientific experiments. In this paper, the passive vibration isolationsystem for the space scientific experimental rack in manned space shuttle has beenstudied and designed.According to the actual mounting, the vibration isolation system layout isdesigned. As a rigid body, 6-degree dynamic model of the scientific experimental rackis developed, and computational methods for the Natural frequency, vibration pattern,and decoupling of equations of motion are presented, and the approach for obtainingsystem output with impulsive and stochastic inputs are also demonstrated. A 3-Dmodel of experimental rack and vibration isolation system is created in ADAMS, andsystem performance in time domain and frequency domain are obtained. The systemparameters are optimized to improve isolation performance. Finally, isolation units areanalyzed based on the simulation results of vibration isolation system.In addition, I also designed the space excremental devices for studying solidlubrication material during my graduate study period.The Shenzhou seven spaceship will conduct research on performance changesand the reasons of destroy of solid lubrication material when exposed in space. It isrequired that the space excremental devices for studying solid lubrication material anda sampling recycle sack, which is used to fix the sampling outside the spaceship to beeroded by atomic oxygen in the low Earth orbit. Also, the astronauts can take backsampling conveniently when outside the spaceship.The experimental devices have to reduce weight and volume, and guaranteeintensity and rigidity while satisfying scientific experiment requirements. As animportant task for astronauts to take back sampling, lock and unlock schemes arespecifically designed. Many attentions are paid to requirements of reliability andoperation safety, complexity and human-machine efficiency. Based on the detaildesign, the dynamic analysis of experimental devices and thermal analysis areconducted in order to guarantee system reliability and safety theoretically.