International Journal of Precision Engineering and Manufacturing

  • 제4권6호
  • /
  • Pages.29-37
  • /
  • 2003
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  • 2234-7593(pISSN)
  • /
  • 2005-4602(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

Development of a High-Speed Electrohydraulic Servovalve System Using Stack-Type Piezoelectric Elements

  • Joo, Choon-Shik (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Bang, Young-Bong (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Lee, Kyo-Il (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Shim, Young-Bo (Samsung Advanced Institute of Technology)
  • 발행 : 2003.11.01
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초록

This paper presents a two-stage electrohydraulic servovalve with a nozzle-flapper pilot stage, which is controlled by stack-type piezoelectric elements. The flapper moving mechanism developed in this research can compensate for the hysteresis problem and thermal expansion of the piezoelectric elements. The experimental result shows that this flapper moving mechanism has the frequency response of about 600 Hz. And a simplified servovalve system using this flapper moving mechanism has the frequency response of about 300 Hz at the supply pressure of 210 bar.

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참고문헌

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