基于时间序列算法的数控机床热误差建模及其实时补偿

上海交通大学学报（自然版） ›› 2016, Vol. 50 ›› Issue (05): 673-679.

基于时间序列算法的数控机床热误差建模及其实时补偿

姚晓栋1,3,黄奕乔1,马晓波2,薛波3,杨建国1

(1. 上海交通大学机械与动力工程学院，上海 200240； 2. 沈阳机床集团有限公司，沈阳 110142； 3. 上海睿涛信息科技有限公司，上海 201108)

收稿日期:2015-04-30 出版日期:2016-05-28 发布日期:2016-05-28
基金资助:
国家自然科学基金项目（51275305）,上海市军民结合产业发展体系建设项目（JMJH2013002）,上海市闵行区产学研项目（2013MH111）,上海市产学研项目（沪CXY201329）

Thermal Error Modeling and RealTime Compensation of CNC Machine Tools Based on Time Series Method

YAO Xiaodong1,3,HUANG Yiqiao1,MA Xiaobo2,XUE bo3,YANG Jianguo1

(1. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. Shenyang Machine Tool Co. Ltd., Shenyang 110142, China; 3.Crestower Co. Ltd., Shanghai 201108, China)

Received:2015-04-30 Online:2016-05-28 Published:2016-05-28

摘要/Abstract

摘要： 摘要：提出了一种基于时间序列算法的机床热误差建模方法.通过时序算法综合分析软件，对实测的热误差数据进行预处理、模式识别、模型参数估计、循环定阶判别以及模型整合，建立表征机床热误差变化规律的实时补偿模型，并通过判别温度变化趋势，实时调整模型迭代系数.通过实时补偿系统，利用所建立的热误差补偿模型对数控机床的热漂移误差进行实时补偿加工.结果表明，工件的径向尺寸误差从补偿前最大的112 μm降低到7 μm，机床加工精度和稳定性大幅度提高.

关键词: 数控机床, 热误差建模, 时间序列算法, 实时补偿

Abstract: Abstract： The principle and process of thermal error modeling on NC machine tools based on the time series method were presented. Comprehensive analysis software of the time series method was used to preprocess the thermal error datum, recognize the mode, estimate the parameters of the model, and distinguish and confirm the model order through a loop computing method. After that, a realtime compensation model was established which showed the changing rule of thermal error on NC machine tools. The iteration coefficients were adjusted in real time with the analysis and comparison of the variation of temperature. The thermal error compensation model established was used to realize the realtime compensation for the thermal drift error of CNC machine tools by making use of the realtime compensation system. The processing results with compensation showed that the errors of the workpieces in diametric direction were reduced from 112 μm to 7 μm, which demonstrated that the machining precision and stability of the machine tool were improved significantly.

Key words: Key words： computer numerical control(CNC) machine, thermal error modeling, time series method, realtime compensation

中图分类号:

TH 161

姚晓栋1,3,黄奕乔1,马晓波2,薛波3,杨建国1. 基于时间序列算法的数控机床热误差建模及其实时补偿[J]. 上海交通大学学报（自然版）, 2016, 50(05): 673-679.

YAO Xiaodong1,3,HUANG Yiqiao1,MA Xiaobo2,XUE bo3,YANG Jianguo1. Thermal Error Modeling and RealTime Compensation of CNC Machine Tools Based on Time Series Method [J]. Journal of Shanghai Jiaotong University, 2016, 50(05): 673-679.

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