Objective To observe the subjects perception of orientation following certain head movements or change of simulator cab attitude in hypergravity ( HG), and assess the feasibility of simulating G excess illusion on the ground by a centrifuge like Spatial Disorientation ( SD) simulator. 目的观察在超重环境下由于动头或座舱姿态变化所引起的定向知觉,探讨在地面用高级空间定向障碍模拟器模拟超重错觉的可行性。