Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Frequency Range Expansion of Pneumatic Exciter by Using Dual-chamber

이중챔버를 이용한 공압가진기의 주파수 범위 확장

  • Park, Young-Woo (Division of Mechanical Engineering, School of Mechanical, Aerospace and Systems Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Kwang-Joon (Division of Mechanical Engineering, School of Mechanical, Aerospace and Systems Engineering, Korea Advanced Institute of Science and Technology)
  • Received : 2013.08.30
  • Accepted : 2013.10.14
  • Published : 2013.10.20
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Abstract

Pneumatic exciters can be good replacements of electrodynamic, piezoelectric and hydraulic exciters owing to simple structure and large exciting force. One problem to be solved is a slow response caused by compressibility of air. Desirable frequency response characteristics of exciter are constant magnitude and zero degree phase, because users want no time delay between input signal and output force. For this reason, frequency range of pneumatic exciters is limited about 0~1 Hz. Therefore, expansion of frequency range is an important issue when designing the pneumatic exciter. In this paper, the pneumatic exciter which has same structure with active pneumatic isolator is dealt with. The dynamic characteristics are presented, and its limitation of expanding frequency range is shown based on analytical studies. Then the pneumatic exciter with dual-chamber is suggested to overcome this problem. Based on simulation study, a design method is presented.

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References

  1. Shin, Y.-H. and Kim, K.-J., 2009, Performance Enhancement of Pneumatic Vibration Isolation Tables in Low Frequency Range by Time Delay Control, phD thesis, DME KAIST.
  2. Sun, J.-O. and Kim, K.-J., 2012, 6-DOF Active Pneumatic Control of Vibration Isolation Table Against Ground and Inertial Force Excitation Induced by Horizontally Moving Mass, phD Thesis, DME KAIST.
  3. Andersen, B. W., 1967, The Analysis and Design of Pneumatic Systems, JOHN WILEY & SONS, INC.
  4. Park, Y.-W. and Kim, K.-J., 2013, A Study on Performance of Pneumatic Actuator, Master's Thesis, MME KAIST, pp. 65-66.
  5. Lee, J.-H. and Kim, K.-J., 2008, Amplitude-dependent Complex Stiffness Modeling of Dual-chamber Pneumatic Spring for Pneumatic Vibration isolation Table, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 18, No. 1, pp. 110-112. https://doi.org/10.5050/KSNVN.2008.18.1.110
  6. Lee, J.-H. and Kim, K.-J., 2007, Modeling of Dual-chamber Pneumatic Spring and Application to Transmissibility Design of Vibration Isolation Table, phD Thesis, DME KAIST.
  7. White, F. M., 2007, Fluid Mechanics, 6th Edition, MCGraw-HillKorea.
  8. Borgnakke, S. and Wylen, V., 2003, Fundamentals of Thermodynamics, 6th Edition, JOHNWILEY&SONS, INC.