This paper discribed the principle and structure of the gear transmission error measurment using circle grating.The retarding gear trasmission eroor ( i =15) was measumed.

• 介绍了圆光栅测量齿轮传动系统精度的原理、系统组成和各部分作用,对速比为15的减速系统进行了实测并对测量结果做了傅立叶分析,发现了1次、5次和15次谐波。