应用潜变量回归在线补偿双直接进给轴热误差

林献坤; 王益涵; 朱琳

doi:10.3788/OPE.20152302.0430

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应用潜变量回归在线补偿双直接进给轴热误差

微纳技术与精密机械 | 更新时间：2020-08-13

- 应用潜变量回归在线补偿双直接进给轴热误差
- Online compensation of thermal error for dual direct feed drive system with latent variable model
- 光学精密工程 2015年23卷第2期页码：430-437
- 作者机构：
  
  上海理工大学机械工程学院上海,200093
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目(No.51005158)();国家科技重大专项资助项目(No. 2013ZX04008-011-02)()
- DOI：10.3788/OPE.20152302.0430
  中图分类号： TM359.4
- 收稿日期：2014-05-20，
  
  修回日期：2014-07-30，
  
  纸质出版日期：2015-02-25
- 稿件说明：
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林献坤, 王益涵, 朱琳. 应用潜变量回归在线补偿双直接进给轴热误差[J]. 光学精密工程, 2015,23(2): 430-437

LIN Xian-kun, WANG Yi-han, ZHU Lin. Online compensation of thermal error for dual direct feed drive system with latent variable model[J]. Editorial Office of Optics and Precision Engineering, 2015,23(2): 430-437
林献坤, 王益涵, 朱琳. 应用潜变量回归在线补偿双直接进给轴热误差[J]. 光学精密工程, 2015,23(2): 430-437 DOI： 10.3788/OPE.20152302.0430.

LIN Xian-kun, WANG Yi-han, ZHU Lin. Online compensation of thermal error for dual direct feed drive system with latent variable model[J]. Editorial Office of Optics and Precision Engineering, 2015,23(2): 430-437 DOI： 10.3788/OPE.20152302.0430.

摘要

为了提高直线电机驱动的双直接进给轴的运动精度

对该类进给轴的热误差进行了建模并研究了误差补偿方法。分析了双直接进给轴进给过程中热误差产生的原因及其补偿的复杂性

给出一种基于潜变量回归的双直接进给轴热误差在线补偿方法。该方法应用激光干涉仪测量进给轴的热变形量

使用热电偶和红外测温仪测量进给轴关键点的温度变化;通过时间匹配变形和温度数据得到统计样本并建立基于潜变量回归的热误差识别模型。以模型的在线计算确定误差补偿量

给出了与数控系统兼容的补偿控制输出策略及补偿系统构建方案。在自构建的龙门双直线电机驱动进给轴平台上进行了在线补偿实验。结果表明:应用潜变量回归方法对双直接进给轴进行热误差补偿可使双直接进给轴的热误差减小75%。

Abstract

The thermal error from a dual direct feed axis driven by linear motors was analyzed and the error compensation method was proposed to improve the accuracy of the system movement. The causes of thermal error generation in the motion processes and the complexity of the compensation were discussed. And then a compensation method based on Latent Variable Regression(LVR) was applied to improvement of the positioning accuracy of the feeding axis. With the method

a laser interferometer was utilized to obtain the thermal deformation of the feed axis in real-time. Some thermocouples and infrared thermometers were used to measure the temperatures of some key points at the linear axis. A regression model based on latent variable model was established to recognize the thermal deformation behavior of the mechanism. The prediction magnitude for on-line error compensation was acquired through the real-time regression calculation and a corresponding system was developed with output control strategy for the compensation process. To demonstrate the procedure of the proposed approach

an experiment was conducted on the self-construction gantry double direct feed axis test rig. the experimental results show that the method for thermal deformation error compensation reduces the linear feed axis thermally induced error by 75%.

关键词

Keywords

references

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