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http://dx.doi.org/10.3795/KSME-A.2003.27.10.1712

Acceleration Feedforward Control in Active Magnetic Bearing System Subject to Base Motion by Filtered-x LMS Algorithm  

Kang, Min-Sig (경원대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.27, no.10, 2003 , pp. 1712-1719 More about this Journal
Abstract
This paper concerns on application of active magnetic bearing(AMB) system to levitate the elevation axis of an electro-optical sight mounted on moving vehicles. In such a system, it is desirable to retain the elevation axis within the predetermined air-gap while the vehicle is moving. An optimal base acceleration feedforward control is proposed to reduce the base motion response. In the consideration of the uncertainty of the system model, a filtered-x least-mean-square(FXLMS) algorithm is used to estimate the frequency response function of the feedforward control which cancels base motions. The frequency response function is fitted to an optimal feedforward control. Experimental results demonstrate that the proposed control reduces the air-gap deviation to 27.7% that by feedback control alone.
Keywords
Acceleration Feedforward Control; Base Motion; Active Magnetic Bearing; Filtered-X Least-Mea-Square Algorithm; Curve Fitting;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 Cole, M. O. T., Keogh, P. S., and Burrows, C. R., 1998, 'Control and Non-linear Compensation of a Rotor/Magnetic Bearing System Subject to base Motion,' 6th Int. Symposium on Magnetic Bearings, Cambridge, MA, pp. 618-627
2 Young-Ho Ha and Chong-Won Lee, 1998, 'Unbalance Response Control in Active Magnetic Bearing System by Optimal Control with Frequency-Shaped Cost Functional,' Trans. of the KSME A, Vol. 22, No. 8, pp. 1431-1441
3 Jeon, S., Ahn, H. J., and Han, D. C., 2002, 'Model Validation and Controller Design for Vibration Suppression of Flexible Rotor Using AMB' KSME International Journal, Vol. 12, No. 12, pp. 1583-1593   과학기술학회마을
4 Kasada, M. E., Clements, J., Wicks, A. L., Hall, C. D., and Kirk, R. G., 2000, 'Effect of Sinusoidal Base Motion on a Magnetic Bearing,' Proc. IEEE International Conference on Control Applications, pp. 144-149   DOI
5 Suzuki, Y., 1998, 'Acceleration Feedforward Control for Active Magnetic Bearing Excited by Ground Motion,' IEEE Proc. Control Theory Appl., Vol. 145, No. 2, pp. 113-118   DOI   ScienceOn
6 Astrom, K. J. and Wittenmark, B., 1990, Computer-Controlled Systems, Prentice-Hall, Inc.
7 Kuo, S. M. and Morgan, D. R., 1996, Active Noise Control Systems, A Wiley-Interscience Publication, John Wiley & Sons, Inc.
8 White, M. T. and Tomizuka, M., 1997, 'Increased Disturbance Rejection in Magnetic Disk Drives by Acceleration Feedforward Control and Parameter Adaptation,' Control Engineering Practice, Vol. 5, No. 6, pp. 741-751   DOI   ScienceOn
9 Seung-Jong Kim and Chong-Won Lee, 1998, 'On-Line Identification of Position and Current Stiffnesses in Active Magnetic Bearing System Equipped with Built-in Force Transducers by LMS Algorithm,' Trans. of the KSME A, Vol. 22, No. 12, pp. 2261-2268