Phenomenological Damping Flow Modeling and Performance Evaluation for a Continuous Damping Control Damper Using MR Fluid

MR 유체를 이용한 연속 감쇠력 가변형 댐퍼를 위한 감쇠유동의 현상학적 모델링과 성능평가

  • 박재우 (경남정보대학 기계자동차산업계열) ;
  • 정영대 (영남대학교 기계공학부)
  • Published : 2008.03.01

Abstract

Recently MR CDC damper has been applied to semi-active suspension control system gradually. Compared to former hydraulic CDC damper, it has rapid time response performance as well as simple internal structure and wide range of damping force. In order to develop control logic algorithm which enables to take maximum advantage of unique characteristics of MR CDC damper, it is inevitable to perform a thorough investigation into its nonlinear performance. In many previous researches, MR fluid model was either simply assumed as Bingham Plastic, or a phenomenological model based on experiment was established instead to predict damping performance of MR CDC damper. These experimental flow model which is not based on flow analysis but intentionally built to fit damping characteristics, may lead to totally different results in case of different configuration or structure of MR CDC damper. In this study, a generalized flow formula from mathematical flow model of MR fluid for annular orifice is derived to analyze and predict damping characteristics when current is excited at piston valve.

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