三轴气浮台自重作用下旋转角速度的研究

The Rotational Angular Velocity Research of Three-Axis Air Bear Testbed Under the Control of Gravity

三轴气浮台旋转过程中会存在重心与旋转轴不重合的情况,这样就会有外力拒产生,从而影响气浮台的正常运转。因此如何解决气浮台由于重心偏移产生的附加力矩问题则是提高其运转精度的关键,必须确定其重心偏移位置,进而对其进行补偿,获取三轴气浮台在自重作用下其旋转角速度的精确值则是确定重心位置的关键步骤,从解决实际问题出发,通过传统的数学方法计算出的结果与实体建模进行动态仿真输出的速度进行对比,指出前者使用的局限性,以及使用后者的可行性。

When in working situation, three-axis air bear will not work correctly if its center of gravity and rotating shaft are not in the same position because of the exist of gravitational torque. So how to solve the gravitational torque is the main process to improve platform working accuracy. For solving that problem, the barycenter position must be confirmed. And how to get the correctly rotational angular velocity is the main step to determine the location of the barycenter. With the contrast of traditional method and dynamic simulation, which are used to measure rotational angular velocity, the conclusion can be got that dynamic simulation is a more available way to test velocity than traditional method.