Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Design of Velocity Ripple Controller using Phase Compensation Feedforward Control

피드포워드 제어를 이용한 위상차 보정 속도리플 제어기의 설계

  • Tae, Won-Hyoung (Department of Mechanical System Design Eng., Seoul National Univ. of Sci. & Tech.) ;
  • Kim, Jung-Han (Department of Mechanical System Design Eng., Seoul National Univ. of Sci. & Tech.) ;
  • Shim, Jong-Youp (Advanced Manufacturing Systems Research Division, Korea Institute of Machinery & Materials) ;
  • Oh, Jeong-Seok (Advanced Manufacturing Systems Research Division, Korea Institute of Machinery & Materials) ;
  • Song, Jun-Yeob (Advanced Manufacturing Systems Research Division, Korea Institute of Machinery & Materials)
  • 태원형 (서울과학기술대학교 기계시스템디자인공학과) ;
  • 김정한 (서울과학기술대학교 기계시스템디자인공학과) ;
  • 심종엽 (한국기계연구원 첨단생산장비연구본부) ;
  • 오정석 (한국기계연구원 첨단생산장비연구본부) ;
  • 송준엽 (한국기계연구원 첨단생산장비연구본부)
  • Received : 2014.03.03
  • Accepted : 2014.07.01
  • Published : 2014.08.01
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Abstract

In this paper, we propose a novel velocity ripple controller using phase compensation feedforward control. Velocity ripples result in many kinds of performance degradations in manufacturing machines, especially such as ultra-precision roll lathes. The generation of velocity ripple in constant velocity control comes from various causes, such as electrical torque ripples, mechanical worn out, inconsistent mass center, etc. Conventional researches about ripple is mainly for reducing torque ripple in actuator level, which is only one of reasons for velocity ripples, so in this study, we focus on eliminating velocity ripples in upper level controller using phase compensation feedforward controller. The proposed algorithm is composed of several modules, such as ripple extractor, phase adjuster and phase follower etc. The suggested algorithm can be easily extended, and it shows a superior performance in the experiments of ultra-precision roll lathes.

Keywords

References

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