Friction compensation controller for load varying machine tool feed drive

Wonkyun Lee, Chan Young Lee, Young Hun Jeong, Byung Kwon Min

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The load applied to a machine tool feed drive changes during the machining process as material is removed. This load change alters the Coulomb friction of the feed drive. Because Coulomb friction accounts for a large part of the total friction the friction compensation control accuracy of the feed drives is limited if this nonlinear change in the applied load is not considered. This paper presents a new friction compensation method that estimates the machine tool load in real time and considers its effect on friction characteristics. A friction observer based on a Kalman filter with load estimation is proposed for friction compensation control considering the applied load change. A specially designed feed drive testbed that enables the applied load to be modified easily was constructed for experimental verification. Control performance and friction estimation accuracy are demonstrated experimentally using the testbed.

Original languageEnglish
Pages (from-to)47-54
Number of pages8
JournalInternational Journal of Machine Tools and Manufacture
Volume96
DOIs
Publication statusPublished - 2015 Jun 22

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All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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