• 제목/요약/키워드: S/A(shock absorber)

검색결과 45건 처리시간 0.023초

쇽압쇼바 감쇠력 특성의 실험적 설계법 연구 (Empirical Design Method for the Damping Force Characteristics of Shock Absorbers)

  • 백운경;김창민
    • 동력기계공학회지
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    • 제15권4호
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    • pp.11-18
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    • 2011
  • A Shock absorber is one of the most important components in vehicle suspension systems. In general, many repeated analyses are required for the design of a shock absorber to satisfy the suspension characteristics of a specific automobile, like fluid flow analysis and mechanical analysis. The purpose of this study is to develop a fast design tool for shock absorber designers. One of the efficient solutions for this can be an empirical design method considering phenomenological effects from the shock absorber design variables. In order to extract the shock absorber's experimental characteristics, we used Taguchi method. This method showed that which design variables have major effects for the shock absorber's damping characteristics. This empirical design method also showed the direction of the design changes to satisfy the designer's intension.

단순 비선형 모델을 이용한 자동차 충격흡수기의 동특성 모델링 기법 연구 (Dynamic Modeling of Automotive Shock Absorbers Using Simple Nonlinear Models)

  • 한형석;서정원;노규석;허승진;김기훈
    • 한국자동차공학회논문집
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    • 제11권5호
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    • pp.156-162
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    • 2003
  • The shock absorber is a part having a direct influence on the ride comfort, stability and dynamic load prediction of a vehicle. Thus, a rationally modeled shock absorber should be required in the dynamic analysis of vehicles. This thesis presents a modified model, based on Worden's hyperbolic tangent function, in order to fit experimental data on the velocity-damping force of a shock absorber. The hyperbolic tangent function correctly indicates the characteristics of a shock absorber, and has the advantage of containing physical causality. To evaluate the method, comparative evaluations of the linear model, the 5th polynomial model and Worden's model were carried out. The function presented in this paper is not only simple but also makes it possible to estimate the function coefficients easily and visually. In addition, it has the advantage of containing physical causality. Lastly, it effectively models the damping force of a shock absorber.

Hyperbolic tangent를 이용한 충격 흡수기 감쇠력 모델 연구 (Damping Force Modeling of Shock Absorbers Using Hyperbolic tangent)

  • 서정원;한형석;노규석;허승진;김기훈
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2003년도 춘계학술대회 논문집
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    • pp.1479-1482
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    • 2003
  • The shock absorber is a part having a direct influence on the ride comfort, stability and dynamic load prediction of a vehicle. Thus, a rationally modeled shock absorber should be required in the dynamic analysis of vehicles. This thesis presents a modified model, based on Worden's hyperbolic tangent function, in order to fit experimental data on the velocity-damping force of a shock absorber. The hyperbolic tangent function correctly indicates the characteristics of a shock absorber. and has the advantage of containing physical causality. To evaluate the method, comparative evaluations of the linear model. the 5th polynomial model and Worden's model were carried out. The function presented in this paper is not only simple but also makes it possible to estimate the function coefficients easily and visually. In addition, it has the advantage of containing physical causality. Lastly, it effectively models the damping force of a shock absorber.

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자동차 충격흡수장치용 감쇠력 조정 전자제어장치 연구 (A Study of Electrical Control Kit for Damping Force of Automotive Shock Absorber)

  • 손일선;이정구
    • 한국자동차공학회논문집
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    • 제16권3호
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    • pp.1-6
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    • 2008
  • The performance of shock absorber is directly related to the car behavior and performance, both for handling and comfort. Most of compact car are assembled the passive shock absorber for cost effect but some of compact driver want better performance of shock absorber than standard parts. Therefore, they want the semi-active suspension control system instead of standard damper system. But they only can change the mechanical damping control shock absorber at A/S market. The mechanical damping control shack absorber can not vary the damping force in driving condition so they do not satisfy the mechanical damping control shock absorber system. In this study, electrically damping force controlled shock absorber system is developed based on the mechanical damping force control damper system. This system can vary damping force by switch on dashboard in driving condition. And, this system can satisfy the requirement of tuning market. Therefore, it is expected the system to show the engineering capability of korean damper company and to increase export market share to oversea damper market.

변위 감응형 충격흡수기에 관한 연구 (A study on the stroke sensitive shock absorber)

  • 박재우;주동우;김영호
    • 한국정밀공학회지
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    • 제14권11호
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    • pp.11-16
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    • 1997
  • In the stroke sensitive shock absorber, the oil path is formed along the internal cylinder surface to make the oil flow during the piston's upper-lower reciprocation movement. In constrast with the conventional shock absorbesr which show one dynamic characteristic curve, stroke sensitive shock absorber shows two kinds of dynamic characteristics according to the stroke. In this study, in order to obtain more precise information about design and damping performance analysis, the analysis on the damping force generation process and dynamic behaviour characteristics of stroke sensitive shock absorber are performed by considering the valve characteristics.

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충격 흡수기의 동적거동 해석 프로그램을 이용한 각 파라미터가 감쇠력에 미치는 영향 조사 (An Investigation into the Effect of Each Parameter on the Damping Forces Using Dynamic Behaviour Analysis P/G of S/A)

  • Park, J.W.;Shin, S.Y.;Lee, S.B.
    • 한국정밀공학회지
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    • 제14권10호
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    • pp.44-49
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    • 1997
  • The damping force is determined by four valves and the components which consist of the shock absorber for vehicle. In this study it is investigated the individual effects of four valves and these components on damping forces using dynamic behaviour analysis program of the shock absorber. In addition, opening of main valves are researched during compression and tension cycle due to up- down reciprocation movement of piston. We are to strictly control the properties and tolerance of componenets having important effects on the damping force. Thus we are intended to produce shock absorber of better quality.

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변위 감응형 충격흡수기에 관한 연구 (A Study on the Stroke Sensitive Shock Absorber)

  • 박재우;주동우;김영호
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 춘계학술대회 논문집
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    • pp.85-90
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    • 1997
  • In the stroke sensitive shock absorber, the oil path is formed along the internal cylinder surface to make the eli flow during piston's upper-lower reciprocation movement. With constraint to the conventional shock absorbers which show one dynamic characteristic curve, stroke sensitive shock absorber shows two kins of dynamic characteristic according to the stroke, In the study, analysis on the damping force generation process and dynamic behaviour characteristics of stroke sensitive shock absorber is performed, the valve characteristics being considered more precise information about design and damping performance analysis.

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걸윙도어 쇽업쇼버의 최적설계 (Optimum Design for Shock Absorber of Gullwing Door)

  • 장영진;이상범;임홍재
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2005년도 추계학술대회논문집
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    • pp.188-191
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    • 2005
  • In this paper, a design optimization technique is presented for determining the stiffness and the damping coefficient of the shock absorber that is used in the Gullwing door system of passenger car. The contact force between the shock absorber and stopper link, when the door is opened, is set up as objective function, and the stiffness and the damping coefficient are set up as design variables. ADAMS optimization module (SQP method) is applied in the design optimization process. This study shows that the stiffness and the damping coefficient of the shock absorber can be effectively determined in initial design stage of the Gullwing door.

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자동차 쇽업소바용 강재의 이종 마찰용접과 AE평가 (Dissimilar Friction Welded for Shock Absorber Steels and Its Evaluation by AE)

  • 이배섭;공유식;김선진;오세규
    • 한국해양공학회:학술대회논문집
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    • 한국해양공학회 2003년도 추계학술대회 논문집
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    • pp.133-137
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    • 2003
  • The shock absorber for vehicles is the important component to absorb the shock in driving. These essential components, piton and piston rod, must be made of S25C, S45C and SCM440 generally depending on kind of vehicles, precisely machined and assembled by the bolt. And it has been difficult to weld this sort of dissimilar materials. They could be unstable in the quality by the conventional arc welding. And also they have a lot of technical problems in manufacturing. But by the friction welding technique, it will be able to be made without such problems. These factors above necessitate nowadays the domestic development of the shock absorber by friction welding and a new approach of study on real-time quality evaluation by AE techniques.

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충격 흡수기의 설계 파라미터 불확실성이 현가 장치 성능에 미치는 영향 (The Effects of Design Parameter Uncertainty of the Shock Absorber on the Performance of Suspension System)

  • 이춘태
    • 한국전자통신학회논문지
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    • 제15권5호
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    • pp.949-958
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    • 2020
  • 차량을 구성하는 엔진, 미션, 현가, 제동, 조향장치 등 다양한 장치 중에서 현가 장치는 타이어와 차체 사이에 설치되어 노면에 의한 차량의 진동을 억제하여 승차감을 향상시키고 차륜과 노면 사이에 적절한 접지력을 유지시켜 차량의 조정안정성을 향상시키는 등 차량역학적인 측면에서 많은 영향을 미치는 장치 중의 하나이다. 본 연구에서는 차량용 현가 장치의 충격 흡수기를 실제 특성과 유사한 상세 모델로 모델링하고, 충격 흡수기의 주요 설계변수의 불확실성을 통계적으로 고려하여 설계변수의 불확실성이 현가 장치의 동적 특성에 미치는 영향에 대하여 연구하였다.