中国机械工程2011，Vol.22Issue(23)：2853-2857,5.
基于时间序列的时栅数控转台动态建模研究
Dynamic Modeling for Time Grating CNC Rotary Table Based on Time Series
摘要
Abstract
In order to apply a novel displacement sensor named time grating to full closed--loop CNC rotary table as an angle detector, it is necessary to transform temporal information to spatial information with time--space transformation algorithm for time grating sensor. According to time se- ries analysis theory, dynamic model of dynamic characteristics of time grating CNC rotary table can be established. Therefore, the next measurement value can be predicted based on past measurement values with the dynamic model. At a result, original absolute displacement signals sampled in equal time interval can be transformed to continuous incremental pulses required by full closed--loop CNC system. Furthermore, the principles of selection criteria for dynamic models, parameters estimation, model checking were presented. In addition, regarding error control, last predicted errors were always corrected by current measurement values in real time so as to eliminate accumulated errors for realizing precision measurement. Experimental results prove that dynamic measurement displacement errors are within ±3＂ with the dynamic model. And precise full closed--loop angular displacement measurement is realized.关键词
时间序列分析/时栅/动态模型/预测/全闭环数控系统Key words
time series analysis/time grating/dynamic model/predict/full closed--loop CNC system分类
机械制造引用本文复制引用
陈自然,彭东林,刘小康,郑永,郑方燕..基于时间序列的时栅数控转台动态建模研究[J].中国机械工程,2011,22(23):2853-2857,5.基金项目
国家自然科学基金资助项目（50805150,50975304) （）
