• Title/Summary/Keyword: Vibration Contro

Search Result 5, Processing Time 0.017 seconds

Vibration Control of Laminated Composite Beams Using Active Constrained Layer Damping Treatment (능동구속감쇠 기법을 이용한 복합적층보의 진동 제어)

  • 강영규;최승복
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.11 no.7
    • /
    • pp.261-266
    • /
    • 2001
  • The flexural vibration of laminated composite beams with active and passive constrained layer damping has been investigated to design a structure with maximum possible damping capacity. The equations of motion are derived fro flexural vibrations of symmetrical,. multi-layer laminated beams. The damping ratio and model damping of the first bending mode are calculated by means of iterative complex eigensolution method. The direct negative velocity feedback control is used for the active constrained layer damping. It is shown that the flexible laminated beam is more effective in the vibration control for both active and passive constrained layer damping. and this paper addresses a design strategy of laminated composite under flexural vibrations with constrained layer damping.

  • PDF

Vibration Suppression Control of Two Cooperating Flexible Manipulators (양팔 협조 유연 매니퓰레이터의 진동억제 제어)

  • Kim, Jin-Soo
    • Journal of the Korean Society of Manufacturing Technology Engineers
    • /
    • v.19 no.5
    • /
    • pp.645-652
    • /
    • 2010
  • For free motions, vibration suppression of single flexible manipulators has been one of the hottest research topics. However, for cooperative motions of multiple flexible manipulators, a little effort has been devoted for the vibration suppression control. So, the aim of this paper is to develop a hybrid force/position control and vibration suppression control scheme for multiple cooperation flexible manipulators handling a rigid object. In order to clarify the discussion, the motions of dual-arm experimental flexible manipulator are considered. Using the developed model, we control a robotic system with hybrid position/force control scheme. Finally, Experiments are performed, and a comparison of experimental results is given to clarify the validity of our control scheme.

Robust Speed Control Scheme for Torsional Vibration Suppression of Two Mass System (이관성계 전동기 구동시스템의 축진동억제를 위한 강인한 속도제어기법)

  • 박태식;유지윤
    • The Transactions of the Korean Institute of Power Electronics
    • /
    • v.8 no.1
    • /
    • pp.80-88
    • /
    • 2003
  • In this paper, the new robust torsional vibration suppression control scheme is proposed for the two mass system. A reduced order state feedback controller where the motor speed and the observed torsional torque are fed back and the PI controller are proposed as the torsional vibration suppression controller. Using the estimated mechanical parameters by off-line RLS(Recursive Least Square) algorithms, the speed controller for torsional vibration suppression is designed and its gains are determined using the Kharitonov robust control theory. The Kharitonov robust control theory can obtain the robust stability with a specified stability margin and a damping limit and the good performance of vibration suppression although if the parameters are varied within some specified limit. The effectiveness and usefulness of the proposed schemes are verified with the simulation and the experimental results on the fully-digitalized 5.5kW two mass system.

Dynamic Characteristic Analysis and Position Control for High Density Optical Head Using Bimorph PZT (고밀도 광학헤드를 위한 Bimorph 압전 액추에이터의 동특성 해석 및 위치제어)

  • Park, Tae-Wook;Park, No-Cheol;Yang, Hyun-Seok;Park, Young-Pil;Kwon, Young-Ki
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.15 no.1 s.94
    • /
    • pp.12-19
    • /
    • 2005
  • This paper proposed a dual actuator using Bimorph PZT for information storage device based on prove array NSOM(near-field scanning optical microscopy). The gap between the media and the optical head should be maintained within the optical tolerance. Therefore, a new actuator having high sensitivity is required. Bimorph PZT, which has fast access time and high sensitivity characteristic, is suitable for this precise actuating system. This paper is focused on derivation of mathematical model of dual Bimorph PZT actuator and control algorithm. Hamilton's principle was used for mathematical model. The model is verified by FEA(finite element analysis), and compared with experimental results. Different control algorithms were used for two Bimorph PZT actuating same direction and opposite direction. The gap between recording media and optical head was controlled within 20nm in experiment.

Recent Trends in Multibody Dynamics Researches reviewed from the papers presented in the Multibody2003 and in the 2003 ASME DETC (Multibody2003와 2003 ASME DETC의 논문들을 통해본 다물체동역학 연구의 세계적 연구추세)

  • Yoo, Wan-Suk
    • Proceedings of the KSME Conference
    • /
    • 2003.11a
    • /
    • pp.1714-1717
    • /
    • 2003
  • ECCOMAS Thematic Conference Multibody 2003 was held at IST (Instituto Superior Technico), Lisbon, Portugal from July 1 to July 4. 2003. And MBDV(Multibody Dynamics and Vibration) in the 2003 ASME DETC was held at Chicago, U.S.A. from September 2 to September 6. In this paper, the presented papers in these conferences were reviewed and the trends in the multibody dynamics are summarized. The session titles in these conferences include Flexible Multibody Dynamics, Vehicle Dynamics, Contact, Biomechanics, Real-time Challenges, Spatial manipulator and Control, Multidisciplinary Applications, and Advanced Education. The poster session was also organized for more discussions in the Multibody2003 conference.

  • PDF