Research on elastic deformation compensation system for three axis air bearing platform

The three axis air bearing platform is an important equipment to perform full physical simulations to analogize non-damping movement of the satellite in outer space. The disturbance torque in the out space environment is very small, and this leads to the fact that the disturbance torque of the three axis air bearing platform should be limited in a small region. Previous studies show that the disturbance torque would be produced due to the displacement of the center of mass under the gravity, when the stiffness of the three axis air bearing platform is small. This paper is to investigate the law of the displacement of the center of the mass due to the deformation of the three axis air bearing platform under gravity. Then an elastic deformation compensation system is proposed to diminish the disturbance torque. For validating the reliability of the elastic deformation compensation system, a number of simulation models are achieved. The simulation results show that the disturbance torque can be decreased sharply by the elastic deformation compensation.