Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Control of Automatic Cargo Handling System Using ER Valves (I) -Modeling of ER Valves-

ER밸브를 이용한 자동 하역 시스템의 제어 (I) -ER밸브의 모델링-

  • Sung, Kum-Kil (Dept.of Mechanical Engineering, Graduate School of Inha University) ;
  • Chung, Dar-Do (Dept.of Mechanical Engineering, Graduate School of Inha University) ;
  • Choi, Seung-Bok (Dept.of Mechanical Engineering, Inha University)
  • 성금길 (인하대학교 대학원 기계공학과) ;
  • 정달도 (인하대학교 대학원 기계공학과) ;
  • 최승복 (인하대학교 기계공학과)
  • Published : 2001.09.01
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Abstract

This paper presents two different models of electrorheological(ER) valves which can be applicable to an automatic cargo handling system at the seaport. Four different ER fluids, which are commercially available, are adopted and their Bingham characteristics are experimentally evaluated with respect to the intensity of electric field. The field-dependent Bingham models are used in the design of two types of ER valves; single-type and divided-type. The governing equations of motion of the ER valves are derived and the principal design parameters are determined based on 200ton platform to be vertically controlled by the ER valves. Both pressure drops due to the applied field and current density required to operate the ER valves are analyzed. In addition, the pressure drops of the cylinder system are evaluated for both ER valves.

Keywords

References

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