增量式光电编码器角位移拟合测速法  

Angular Position Fitting Velocity Detection of Incremental Oрtical Encoder

作　　者：王辉[1,2] 胡建华[1] 王慎航 

机构地区：[1]中国科学院自动化研究所,北京100190 [2]北京信息科技大学自动化学院,北京100192

出　　处：《仪表技术与传感器》2014年第10期99-101,共3页Instrument Technique and Sensor

摘　　要：为提高增量式光电编码器电机测速的精度,针对常用的M法和T法无法满足整个测速范围内误差要求的问题,提出了对码盘信号进行角位移拟合求采样时刻即时速度的新方法。在电机匀速和匀加速情况下,对码盘脉冲信号进行了测速仿真实验,比较了三种方法的测速精度。结果表明,角位移拟合法在整个速度范围内都能获得很高的测速精度和误差一致性,对提高速度反馈精度,改善伺服控制系统性能具有实际意义。The incremental optical encoders are w^dely used m servo control systems. Uut neither the M method nor the 1 method can meet the error requirements within the whole speed range. To improve the measurement accuracy of incremental optical encoder, the angular position fitting method was developed which can get the instantaneous speed at the sampling time. Velocity de- tecting experiments with generated encoder pulses were taken with these three methods under a constant speed and uniformly accel- erated speed,followed by the comparison of detecting accuracies and errors of these methods. The results show that the new method can achieve high measurement precision and consistency errors over the entire speed range. It has practical significance to improve the speed feedback precision and the performance in servo control system.

关 键 词：光电编码器 机测速 角位移 多项式拟合 

分 类 号：TH741[机械工程—光学工程]