Vibration Control of Steel-Frame Structures by a Linear Motor Damper

선형 모터 댐퍼를 이용한 철골 구조물의 진동제어

  • 문석준 (한국기계연구원 구조연구부) ;
  • 정태영 (한국기계연구원 구조연구부) ;
  • 임채욱 (한국기계연구원 구조연구부) ;
  • 정정교 (유니슨 산업(주) 기술연구소) ;
  • 박진일 (유니슨 산업(주) 기술연구소) ;
  • 김두훈 (유니슨 산업(주) 기술연구소)
  • Published : 2003.04.01


The linear motor has not only no backlash and less friction, resulting in very high accuracy, but also mechanical simplicity, higher reliability, and longer lifetime. In this study, a large-capacity hybrid mass damper using linear motor principle has been developed to suppress vibration of large structures. It is designated linear motor damper in this paper. The LMD has been designed to be able to move the auxiliary damper mass of 155kg up to $\pm$250mm stroke. A series of performance tests for LMD control system with $H_{winfty}$ robust controller have been carried out on the full-scale steel frame structure. Through the performance tests, it is confirmed that vibration response levels are reduced down 10dB for the first and second modes of the test structure.


linear motor damper;vibration control;$H_\infty$ control;building structure


  1. Nasar, S. A and Boldea, I., Linear Electric Motors: Theory, Design and Practical Applications, Prentice-Hall, Englewood Cliffs, New Jersey, 1987.
  2. Spencer, Jr., B. F. and Saint, M K, "Controlling buildings: A new frontier in feedback," Special Issue of the IEEE Control Systems Magazine on Emerging Technology, Vol. 17, No. 6, 1997, pp. 19-35.
  3. 정태영, 문석준, 정종안, 박희강, 장석명, "Linear oscillatory actuator를 이용한 구조물 진동의 능동제어 연구", 한국소음진동공학회지, 제 7권, 제2호, 1997, pp. 311-317.
  4. Chung, T. Y, Moon, S. J., and [ang, S. M, "Active control on the structural vibration under base excitations using a linear oscillatory actuator," Int. J. Applied Electromagnetics and Mechanics, Vol. 10, 1999, pp. 203-214.
  5. Soong, T. T. and Dargush, G. F., Passive Energy Dissipation System in Structural Engineering, John Wiley & Sons, 1997.
  6. Glover, K and Doyle, J. C, "State space formulae for all stabilizing controllers that satisfy an $H_{\infty}$-norm bound and relations to risk sensitivity," System and Control Letters, Vol. 11, 1998, pp. 167-172.
  7. Zhou, K. and Doyle, J. C , Essentials of Robust Control, Prentice Hall, 1998.
  8. Seto, K. and Mitsuta, S., "A new method for making a reduced-order model of flexible structures using observability and amtrollability and its application in vibration control," ISME, Series C, Vol. 37, No.3, 1994, pp. 444-449.