Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Controller Design by Error Shape and Steady-State Error Analysis for a Feed Drive System in CNC Milling Machine

CNC 밀링머신 이송장치의 오차유형 및 정상상태 오차해석에 의한 제어기 설계

  • 이건복 (숭실대학교 기계공학과) ;
  • 길형균 (숭실대학교 대학원 기계공학과)
  • Published : 2005.03.01
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Abstract

This paper deals with the position control fur a feed drive system in CNC milling machine, which utilizes a modified error signal for the elimination of steady-state error. A linear time-invariant (LTI) system has consistent properties in response to standard test signal inputs. Those also appear in an error curve acquired from the response. From such properties, constructed is an error model for the position control of the feed drive. And then added is the output of the error model to the current error signal. Consequently the resulting proportional control system brings performance improvement in view of the steady-state error. The effectiveness of the proposed scheme is confirmed through simulations and experiments.

Keywords

References

  1. Kang, S. K. and Seo, S. W., 'Design and Principle of CNC System,' Chung Mun Gak, pp. 191-232, 2002
  2. Poo, A. N., Bollinger, J. G. and Younkin, G. W., 'Dynamic Errors in Type I Contouring Systems,' Trans. on Industry Applications, Vol. 1A-8, No.4, pp. 477-484, 1972
  3. Koren, Y., 'Cross-Coupled Biaxial Computer Control for Manufacturing Systems,' J. of Dynamic Systems, Measurement and Control, Vol. 102, pp. 265-272, 1980 https://doi.org/10.1115/1.3149612
  4. Koren, Y. and Lo, C. C., 'Variable-Gain Cross-Coupling Controller for Contouring,' Annals of CIRP, Vol. 104, pp. 371-374, 1991
  5. Kulkarni, P. K. and Srinivasan, K., 'Cross -Coupled Control of Biaxial Feed Drive Servomechanisms,' ASME J. of Dynamic systems, Measurement and Control, Vol. 112, pp. 225-232, 1990 https://doi.org/10.1115/1.2896129
  6. Joo, J. H., Lee, H. C., Lee, Y. J. and Jeon, G. J., 'A New Method of Contour Error Modeling for Cross-Coupled Control of CNC Machines,' ICASE Magazine. Vol. 3, pp. 389-397, 1997
  7. Jee, S. C., 'A Study on the Friction Compensation in CNC Servomechanism by Fuzzy Logic Control,' J. of the KSPE, Vol 15, pp. 56-67, 1998
  8. Jee, S. C. and Yun, S. P., 'Adaptive Cross-Coupling Control System Considering Cutting Effects,' Trans. of KSME(A), Vol. 26, pp. 1480-1486, 2002 https://doi.org/10.3795/KSME-A.2002.26.8.1480
  9. Lee, G. B., 'Digital Contouring Control of Multi-axial System,' Trans. KIEE, Vol. 47, No.5, pp.623-630, 1998
  10. Lee, G. B. and Gil, H. G., 'Controller Design using an Error Model for Curvilinear Type Path in Machine Tool,' spring proceeding of KSPE, pp. 455-458, 2004
  11. Katsuhiko, Ogata, 'Modem Control Engineering,' Prentice Hall, pp. 132-139, 1997