中文摘要：

利用设计的实验装置，对轴系超声波悬浮支撑间隙进行了测试。测试结果表明，当悬浮间隙大于两接触表面粗糙度总和时，轴被悬浮起来；对比测试了两种不同材料转轴的悬浮间隙，在压电换能器驱动信号频率为21．34kHz，驱动电压由100V增加到220V时，铝合金轴的平均悬浮间隙从12．49μm增加到52．97μm，铁轴的平均悬浮间隙从10．21μm增加到43．86μm。

英文摘要：

Based on a designed test equipment, the interstice of ultrasonic levitative support was measured. The results show that the axis can be levitatively supported when the interstice is lager than the summation roughness of scratch surfaces. The interstices of two different material axes （aluminum and iron） were tested, the average levitative interstice of aluminum alloy axis increases from 12.49 μm to 52.97 μm and that of iron axis increases from 10.21μm to 43.86 μm under the condition of voltage from 100 V to 220 V and frequency of 21.34 kHz.