[ Article ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 27, No. 3, pp.194-202

ISSN: 2508-5107 (Online)

Print publication date 15 Jun 2018

Received 11 Apr 2018 Accepted 30 May 2018

DOI: https://doi.org/10.7735/ksmte.2018.27.3.194

위치 결정 시스템의 안정성 개선을 위한 와전류 감쇠기(Eddy Current Damper) 설계와 응용

조재훈^a ; 서창훈^b ; 김효영^a ; 전용호^b ; 이문구^b^{, *}

Design and Application of an Eddy-Current Damper for Improving Stability in Positioning Systems

Jae-Hoon Jo^a ; Chang-Hoon Seo^b ; Hyo-Young Kim^a ; Yong-Ho Jeon^b ; Moon-Gu Lee^b^{, *}

aResearch Institute of Sustainable Manufacturing System, Korea Institute of Industrial Technology, 89, Yangdaegiro-gil, Ipjang-myeon, Seobuk-gu, Cheonan, Chungnam-do, 31056, Korea
bMechanical Engineering, Ajou University, 206, Worldcup-ro Yeongtong-gu, Suwon, Gyeonggi-do, 16499, Korea

Correspondence to: ^*Tel.: +82-31-219-2338, Fax: +82-31-219-1611, E-mail address: moongulee@ajou.ac.kr (Moon Gu Lee).

Abstract

Air bearing-guided linear motion modules have so little friction that they are widely used for precision positioning systems. The module exhibits disturbance vibration that is difficult to control because the air bearings have too small a damping coefficient. In this paper, an eddy-current damper (ECD) is proposed for an air bearing-guided linear motion module to improve the vibration isolation characteristics. A Halbach magnet array is devised to increase the density of the magnetic flux of the ECD because a stronger magnetic field generates a greater damping force. A theoretical magnetic model of a Halbach magnet array is presented, and its working principle is investigated. In order to investigate the performance of the module, an experimental instrument with the module, ECD, and control devices was constructed. The authors compared the experimental data of the module’s positioning performance for the cases with and without the ECD.

Keywords:

Eddy Current Damper, Vibration Suppression, 1-Axis System, Linear Motion, Air-bearing System

References

You, T. H., Jung, S. C., Lee, J. E., Choi, H. G., Ji, H. K., Kim, H., 2007, A Study on The Dynamic Characteristics of the Porous Air Bearing with Moving Velocity Change, Korean Society for Noise and Vibration Engineering(KSNVE), 11 48-52.
Ellis, R. C., Fink, R. A., Rich, R. W., 1989, Eddy Current Damper, In NASA, Marshall Space Flight Center, The 23rd Aerospace Mechanisms Symposium, 127-137.
Sodano, H. A., Bae, J. S., Inman, D. J., Belvin, W. K., 2005, Concept and Model of Eddy Current Damper for Vibration Suppression of a Beam, Journal of Sound and Vibration, 288:4 1177-1196.
Ebrahimi, B., Khamesee, M. B., Golnaraghi, F., 2010, Permanent Magnet Configuration in Design of an Eddy Current Damper, Int. Microsystem Technoligies, 16 19-24. [https://doi.org/10.1007/s00542-008-0731-z]
Yi, Z., Hong, Z., Sun, H. Z., 2010, Research of the Orthoscopic Permanent Magnet Eddy Current Damper in Magnetic Stage, IEEE, International Conference on Computer Application and System Modeling (ICCASM), 14 354~356.
Tan, K. K., Huang, S. N., Teo, C. S., Yang, R., 2010, Damping Estimation and Control of a Contactless Brake System Using an Eddy Current, IEEE, ICCA 2010, Xiamen, 2224-2228.
You, Y. H., Pham, M. N., Ahn, H. J., Choi, D. S., Cho, K. J., 2012, Optimal Design of Reaction Force Compensation Device for Precision Stage Considering Eddy Current Damper, Korean Society for Precision Engineering, 2012:5, 1095-1096.
Lee, K. J., Park, K. H., 1999, Optimal Robust Control of a Contactless Brake System Using an Eddy Current, Mechatronics, 9:6, 615-631. [https://doi.org/10.1016/S0957-4158(99)00008-2]
Bae, J. S., Kwak, M. K., Inman, D. J., 2005, Vibration Suppression of a Cantilever Beam Using Eddy Current Damper, Journal of Sound and Vibration 284 805-824. [https://doi.org/10.1016/j.jsv.2004.07.031]
Furlani, E. P., 2001, Permanent Magnet and Electromechanical Devices: Materials, Analysis, and Applications, Academic Press, NewYork.
Park, J. S., Kwag, D. G., Bae, J. S., Hwang, J. H., 2008, A Study on Modeling and Experiments of an Eddy Current Damping Korean Society for Noise and Vibration Engineering (KSNVE), 2008:4 240-244.
Zhu, H., Teo, T. J., Pang, C. K., 2015, Analysis of Force Harmonics and Eddy Current Damping for 2 DOF Moving Magnet Linear Motor, IECON, 41st Annual Conference of the IEEE Industrial Electronics Society, 1055-1060.