Browse > Article
http://dx.doi.org/10.3795/KSME-A.2004.28.12.1942

Analysis of Novel Magnetic-Spring Actuators for Portable Units  

한인환 (홍익대학교 기계정보공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.28, no.12, 2004 , pp. 1942-1949 More about this Journal
Abstract
SLA(Scanned Linear Array) is a portable display unit for implementing next-generation virtual realities, utilizes a design that light generated by a line of LEDs is reflected from the rapidly oscillating mirror to generate a raster display. Reaction forces generated by the motions of the mirror and counter-balance mass cancel each other at the device base, reducing vibration. Metal leaf springs have been extensively applied in such portable units. Magnetic springs have been developed and adopted that can replace the metal spring and can avoid many disadvantages of metal springs. We model and analyze the dynamics of the structure with magnetic springs and present the simulation and experimental analysis results, which can be utilized for identifying and eliminating possible problem sources in removing shaking forces and moments, and oscillating the mirror at the required amplitude and frequency. Finally, we present the improved novel magnetic actuator model which can be applied in portable display units.
Keywords
Portable Display Unit; Shaking Forces; Balance; Magnetic Springs;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Idlani, S., Streit, D.A. and Gilmore, B.J., 1993, 'Elastic Potential Synthesis-A Generalized Procedure for Dynamic Synthesis of Machine and Mechanism Systems,' ASME Journal of Mechanical Design, Vol. 115, pp. 568-575   DOI   ScienceOn
2 Shin, E. and Streit, D.A., 1997, 'Harmonic Synthesis Theory for Dynamic Spring Balancing,' ASME Journal of Dynamic Systems, Measurement, and Control, Vol. 119, No.1, pp. 61-68   DOI   ScienceOn
3 Wells, B.A., 1990, 'Low Vibration Resonant Scanning Unit for Miniature Optical Display Apparatus,' United States Patent 4902083
4 Qian, K.-X., Zeng, P., Ru, W.-M. and Yuan, H.-Y., 2003, 'Novel Magnetic Spring and Magnetic Bearing,' IEEE Trans. on Magnetics, Vol. 39, No.1, pp. 559-561   DOI   ScienceOn
5 Zang, S.M. and Chen, J.H., 1995, 'The Optimum Balance of Shaking Force and Shaking Moment of Linkage,' Mech. Mach. Theory, Vol. 30, No.4, pp. 589-597   DOI   ScienceOn
6 Lee, T.W. and Cheng, C., 1984, 'Optimum Balancing of Combined Shaking Force, Shaking Moment, and Torque Fluctuations in High-Speed Linkages,' ASME Journal of Mechanisms, Transmissions, and Automation in Design, Vol. 106, pp. 242-251   DOI
7 Tricamo, S.J. and Lowen, G.G., 1981, 'A New Concept for Force Balancing Machines for Planar Linkages. Part 1: Theory,' ASME Journal of Mechanical Design, Vol. 103, pp. 637-642   DOI
8 Bagci, C., 1983, 'Complete Balancing of Space Mechanisms-Shaking Force Balancing,' ASME Journal of Mechanisms, Transmissions, and Automation in Design, Vol. 105, pp. 609-616   DOI
9 Yu, Y.-Q. and Lin, J., 2003, 'Active Balancing of a Flexible Linkage with Redundant Drives,' ASME Journal of Mechanical Design, Vol. 125, pp. 119-123   DOI   ScienceOn
10 Han, I., 1998, Dynamic Analysis and Optimum Design of the Actuator for SLA Apparatus, KETI-RD-98050, MIC