• 제목, 요약, 키워드: MR damper

검색결과 370건 처리시간 0.036초

Design and Evaluation a Multi-coil Magneto-rheological Damper for Control Vibration of Washing Machine

  • Phu, Do Xuan;Park, Joon Hee;Woo, Jae Kwan;Choi, Seung Bok
    • 한국소음진동공학회:학술대회논문집
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    • pp.543-548
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    • 2013
  • 이 논문은 세탁기의 진동제어를 위한 MR 댐퍼의 설계과정을 제시한다. 이 연구에서는 MR 댐퍼의 작은 크기와 함께 높은 댐핑력과 저전력을 소비하도록 설계되었다. MR 댐퍼는 전단모드를 사용하도록 제안되었고 빙햄모델을 이용하여 최설설계를 진행하였다. 이 과정에서 멀티코일이 댐핑력을 높이기 위해 적용되었고 최적화된 구조를 찾아내기 위하여 APDL을 이용하여 최적설계가 수행되었다. 이 후 최적의 수치 값들을 통해 제작하여 실험을 수행하였다. 이 때 슬라이딩모드 제어기를 적용하여 시뮬레이션과 제어실험을 모두 수행하였다. 실험의 결과로부터 MR 댐퍼가 세탁기의 진동제어를 위한 요구 댐핑력을 만족시켜줌을 확인하였다.

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바이패스홀을 특징으로 하는 승용차용 MR 댐퍼의 성능 평가 (Performance Evaluation on an MR Damper Featuring Bypass Hole for Passenger Vehicle)

  • 오종석;신도균;손정우;최승복
    • 한국소음진동공학회:학술대회논문집
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    • pp.998-999
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    • 2014
  • This paper proposes a method for damping force modeling of magnetorheological (MR) damper featuring bypass hole. After describing configuration and of the MR damper, a damping force modeling of the MR damper is derived based on Bingham model of MR fluid. MR damper consists of piston, accumulator, gap, bypass hole and coil. Damping force is consists of spring force induced by accumulator, viscous force induced at gap and bypass hole, and controllable force induced at gap.

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다중 자기 코일 작동기를 사용한 MR damper의 설계해석 (Design of MR damper with multi_stage core)

  • 이규섭;유원희;류봉조
    • 한국소음진동공학회:학술대회논문집
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    • pp.525-528
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    • 2008
  • The dynamic range of MR damper is the most important characteristics for the usage of semi-active control system. The damping force can be increased by simply decresing the orifice gap in the traditional oil damper, but it deteriorate the dynamic range in MR damper. In this paper, the multi-stage electro-magnetic core is suggested to maintain the performance of MR damper with a large damping force. The MR damper with 3 stage core is designed and manufactured for testing and analysis.

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차량용 MR 충격댐퍼의 동특성 해석 (Dynamic Characteristic Analysis of MR Impact Damper for Vehicle System)

  • 송현정;우다윗;최승복
    • 한국소음진동공학회:학술대회논문집
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    • pp.147-152
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    • 2006
  • This paper presents the dynamic characteristics of MR impact damper for vehicle collision system. Various types of mechanism have been proposed for reduce transmitted force to vehicle chassis and finally protect occupants from injury. In the case of frontal collision, the bumper make main role of isolation material for collision attenuation. In this study, proposed bumper system composed of MR impact damper and structures. The MR impact damper is to adopted MR fluid which has reversible properties with applied magnetic field. MR fluid operates under flow mode with Bingham flow and bellows is used for generation of fluid flow. Mathematical model of MR impact damper incorporated with MR fluid is established. Field dependent damping force is investigated with time and frequency domain. The MR impact damper is then incorporated with vehicle crash system. The governing equation of motion of vehicle model is formulated considering occupant model. Dynamic characteristics of vehicle collision system investigated with computer simulation.

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차량용 MR충격댐퍼의 동특성 해석 (Dynamic Characteristic Analysis of MR Impact Damper for Vehicle System)

  • 송현정;우다윗;최승복
    • 한국소음진동공학회논문집
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    • v.16 no.7
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    • pp.754-761
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    • 2006
  • This paper presents the dynamic characteristics of MR impact damper for vehicle collision system. Various types of mechanism have been proposed to reduce force transmitted to the vehicle chassis and finally to protect occupants from injury. In the case of head-on collision, the bumper makes main role of isolation material for collision attenuation. In this study, the proposed bumper system consists of MR impact damper and structures. The MR impact damper utilizes MR fluid which has reversible properties with applied magnetic field. The MR fluid operates under flow mode. The bellows is used for generation of fluid flow. A mathematical model of the MR impact damper is derived incorporating with Bingham model of the MR fluid. Field dependent damping force is investigated with time and frequency domain. The MR impact damper is then incorporated with vehicle crash system. The governing equation of motion of vehicle model is formulated considering occupant model. Dynamic characteristics of vehicle collision system investigated with computer simulation.

실험적으로 구한 MR 댐퍼의 개선된 Bouc-Wen 모델을 이용한 자동차 서스펜션 제어 (Vehicle Suspension Control Using an MR Damper of a Bouc-Wen Model Obtained from Experimental Studies)

  • 전형진;정슬
    • 제어로봇시스템학회논문지
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    • v.16 no.2
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    • pp.151-157
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    • 2010
  • This paper presents the modelling of an MR damper system through extensive experimental studies. The hysteresis of the MR damper is modelled by using the improved Bouc-wen model. A test bed for experimental studies of measuring parameters of the MR damper is designed and implemented. Based on the experimental data, the Bouc-Wen Model is modified for the MR damper system. To check the modelling property, a vehicle suspension system is controlled using a PID controller for the verification of the MR damper model.

인접건축물의 진동제어를 위한 MR감쇠기의 위치 선정에 관한 연구 (Performance Evaluation of Vibration Control of Adjacent Buildings According to Installation Location of MR damper)

  • 김기철;강주원
    • 한국강구조학회 논문집
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    • v.24 no.1
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    • pp.91-99
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    • 2012
  • 최근 인접 건축물의 진동제어와 관련된 연구가 몇몇 연구자에 의하여 수행되고 있으며 그리고 구조물의 지진동 제어를 위하여 준능동 감쇠기의 일종인 MR 감쇠기가 적용되고 있다. 본 논문에서는 MR 감쇠기의 위치에 따른 인접 건축물의 지진동 제어성능을 분석하여 MR 감쇠기의 설치에 대한 최적의 위치를 선정하고자 한다. 본 연구를 위하여 인접한 20층과 15층 건축물을 예제 구조물로 사용하였으며 이 예제 구조물은 서로 다른 고유진동수를 갖게 하였으며 예제 구조물의 지진동 제어를 위하여 Groundhook 제어기법을 적용하였다. 예제 구조물의 수치해석에 의한 지진응답 분석결과, 변위응답 제어를 위하여 인접 건축물의 최상층에 MR 감쇠기를 설치하는 것이 제어성능에 있어서 우수하며 가속도응답을 제어하기 위해서는 인접 건축물의 중간층에 MR 감쇠기를 설치하는 것이 우수한 제어성능을 보이고 있다. MR 감쇠기를 중간층에 설치할 경우에, 변위응답과 가속도응답을 동시에 제어가 가능하다. 따라서 건축물의 제어 목표에 따라서 MR 감쇠기 설치위치를 적절하게 선정해야 할 것이다.

통합제진마운트용 MR 댐퍼의 실험적 성능 평가 (Experimental Performance Evaluation of MR Damper for Integrated Isolation Mount)

  • 성민상;최승복;김철호;이홍기;백재호;한현희
    • 한국소음진동공학회:학술대회논문집
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    • pp.65-70
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    • 2010
  • This paper presents experimental performance evaluation of a magnetorheological (MR) damper for integrated isolation mount for ultra-precision manufacturing system. The vibration sources of the ultra-precision manufacturing system can be classified as follows: the one is the environmental vibration from the floor and the other is the transient vibration occurred from stage moving. The transient vibration occurred from the stage moving has serious adverse effect to the process because the vibration scale is quite larger than other vibrations. Therefore in this research, a semi-active MR damper, which can control the transient vibration, is adopted. Also the stage needs to be isolated from tiny vibrations from the floor. For this purpose, a dry-frictionless MR damper is required. In order to achieve this goal, a novel type of MR damper is originally designed and manufactured in this work. Subsequently, the damping force characteristics of MR damper are evaluated by simulation and experiment. In addition, the vibration control performance of the MR damper associated with the stage mass is evaluated.

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통합제진마운트용 MR 댐퍼의 실험적 성능 평가 (Experimental Performance Evaluation of MR Damper for Integrated Isolation Mount)

  • 성민상;최승복;김철호;이홍기;백재호;한현희;우제관
    • 한국소음진동공학회논문집
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    • v.20 no.12
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    • pp.1161-1167
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    • 2010
  • This paper presents experimental performance evaluation of a magnetorheological(MR) damper for integrated isolation mount for ultra-precision manufacturing system. The vibration sources of the ultra-precision manufacturing system can be classified as follows: the one is the environmental vibration from the floor and the other is the transient vibration occurred from stage moving. The transient vibration occurred from the stage moving has serious adverse effect to the process because the vibration scale is quite larger than other vibrations. Therefore in this research, a semi-active MR damper, which can control the transient vibration, is adopted. Also the stage needs to be isolated from tiny vibrations from the floor. For this purpose, a dry-frictionless MR damper is required. In order to achieve this goal, a novel type of MR damper is originally designed and manufactured in this work. Subsequently, the damping force characteristics of MR damper are evaluated by simulation and experiment. In addition, the vibration control performance of the MR damper associated with the stage mass is evaluated.

Response and control of jacket structure with magneto-rheological damper at multiple locations/combinations

  • Syed, Khaja A.A.;Kumar, Deepak
    • Ocean Systems Engineering
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    • v.8 no.2
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    • pp.201-221
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    • 2018
  • In this paper a comprehensive study for the structural control of Jacket platform with Magneto-Rheological (MR) damper is presented. The control is implemented as a closed loop feedback of the applied voltage in the MR Damper using fuzzy logic. Nine cases of combinations with MR damper are presented to complete the work. The selection of the MR damper (RD 1005-3) is based on the operating parameters (i.e., the range of frequency and displacement). Bingham model is used to obtain the control forces. The damping co-efficient of the model is obtained using empirical relationship between the voltage in the MR damper and input velocity from the structural members. The force acting on the structure is obtained from Morison equation using P-M spectrum. The results show that the reliable control was obtained when there was a continuous connection of multiple MR dampers with the lower levels of the structure. Independent MR dampers at different levels provided control within a range, while the MR dampers placed at alternate positions gave very high control.