• 제목/요약/키워드: Vehicle suspension system

검색결과 454건 처리시간 0.027초

자기부상열차의 다이나믹 시뮬레이션 (Dynamic Simulation of Magnetically-Levitated Vehicle)

  • 김종문;배종일
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.34-36
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    • 2005
  • In this paper, dynamic simulation results for magnetically-levitated vehicles are presented. The dynamic equations and models for a half-bogie system are derived. They include primary suspension system, module, secondary suspension and cabin. Also, the dynamic characteristics for the derived models are analysed.

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부품의 국부적 유연성이 차량의 동적 거동에 미치는 영향 (Flexibility Effects of Components on the Dynamic Behavior of Vehicle)

  • 이상범;임홍재
    • 한국공작기계학회논문집
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    • 제12권4호
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    • pp.57-62
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    • 2003
  • A fundamental structural design consideration for a vehicle system is the overall vibration characteristics in bending and torsion. Vibration characteristics of such vehicle system are mainly influenced by the static and dynamic stiffness of the vehicle body structure and also by the material and physical properties of the components attached to the vehicle body structure. In this paper, modeling techniques for the vehicle components are presented and the flexibility and mass effects of the components for the vibration characteristics of the vehicle are investigated. The $1^{st}$ torsional frequency is increased by attaching windshields to the B.I.W. (body-in-white), but the $1^{st}$ bending frequency is decreased by the mass effect. And also, the natural frequencies of the vehicle are large decreased by attaching bumpers, seats, doors, trunk-lid etc. But, suspension system rarely affects the natural frequencies of the vehicle. The study shows thai the dynamic characteristics of the vehicle system can be effectively predicted in the initial design stage.

TTX 차량의 능동 현가장치 설치 및 수정 작업 개선을 위한 대차/차체 인터페이스 볼스터 개발 (Bogie/Carbody Interface Bolster Development for the Installation of Active Suspensions and the Modification Operation Improvement of TTX Vehicle)

  • 김형준;박성태;강광호;이원상
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2011년도 춘계학술대회 논문집
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    • pp.28-34
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    • 2011
  • The carbody underframe of TTX vehicle should be modified a lot for the installation of new devices such as an active suspension system between the bogie and the carbody of TTX vehicle, because the carbody underframe is one body structure consisting of a center sill welded with a carbody bolster. Modification operation of the carbody takes a lot of time and cost, because the huge sized carbody structure should be moved to a machining apparatus and machined to guarantee the manufacture accuracy of new device installation brackets. For this reason, modification operation improvement is needed to install new devices more efficiently between the bogie and the carbody. This paper introduce the development of 'bogie/carbody interface bolster' that not only supports the carbody weight but also enables new devices to be installed more efficiently between the bogie and the carbody. This development has advantage to reduce working time and cost to install new devices such as an active suspension system between the bogie and the carbody by minimizing the modification of the carbody of TTX vehicle.

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Dynamic interaction analysis of actively controlled maglev vehicles and guideway girders considering nonlinear electromagnetic forces

  • Min, Dong-Ju;Lee, Jun-Seok;Kim, Moon-Young
    • Coupled systems mechanics
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    • 제1권1호
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    • pp.39-57
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    • 2012
  • This study intends to explore dynamic interaction behaviors between actively controlled maglev vehicle and guideway girders by considering the nonlinear forms of electromagnetic force and current exactly. For this, governing equations for the maglev vehicle with ten degrees of freedom are derived by considering the nonlinear equation of electromagnetic force, surface irregularity, and the deflection of the guideway girder. Next, equations of motion of the guideway girder, based on the mode superposition method, are obtained by applying the UTM-01 control algorithm for electromagnetic suspension to make the maglev vehicle system stable. Finally, the numerical studies under various conditions are carried out to investigate the dynamic characteristics of the maglev system based on consideration of the linear and nonlinear electromagnetic forces. From numerical simulation, it is observed that the dynamic responses between nonlinear and linear analysis make little difference in the stable region. But unstable responses in nonlinear analysis under poor conditions can sometimes be obtained because the nominal air-gap is too small to control the maglev vehicle stably. However, it is demonstrated that this unstable phenomenon can be removed by making the nominal air-gap related to electromagnetic force larger. Consequently it is judged that the nonlinear analysis method considering the nonlinear equations of electromagnetic force and current can provide more realistic solutions than the linear analysis.

MR 현가장치를 장착한 승용 차량의 진동제어 (Vibration Control of a Passenger Vehicle Featuring MR Suspension Units)

  • 이환수;최승복;이순규
    • 소음진동
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    • 제11권1호
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    • pp.41-48
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    • 2001
  • This paper presents vibration control performance of a passenger vehicle featuring magneto-rheological (MR) suspension units. As a first step, a cylindrical shock absorber is designed and manufactured on the basis of Bingham Property of a commercially available MR fluid. After verifying that the damping force of the shock absorber can be controlled by the intensity of magnetic field(or input current), it is applied to a full-car model. An optimal controller is then formulated to effectively suppress unwanted vibration of the vehicle system. The control performances are evaluated via hardware-in-the-loop simulation(HILS), and presented in both time and frequency domains.

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LQ제어 기법을 활용한 자기부상열차 부상제어기 설계에 관한 연구 (Study of Design for Maglev Levitation Controller based on LQ theory)

  • 이남진;한형석;양방섭;김철근
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2007년도 추계학술대회 논문집
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    • pp.865-871
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    • 2007
  • The levitation system of Maglev is composed with electro-magnet, power supplier, controller and sensor. The complex interactions between above subcomponents define the characteristics of electromagnetic suspension of the vehicle. In this study, to understand the influence of controller on the running performance of Maglev, the new controller based on LQ theory will be designed and be simulated with simplified vehicle model. Then the influence of controller on the characteristics of electromagnetic suspension will be reviewed through comparison with existing control algorithm of our prototype vehicle.

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MR 시트댐퍼를 장착한 상용차의 제어성능 평가 (Performance Evaluation of Commercial Vehicle with MR Seat Damper)

  • 성금길;이호근;남무호;최승복
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2003년도 춘계학술대회논문집
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    • pp.1048-1053
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    • 2003
  • This paper proposed a MR(Magneto-rheological) seat damper for a commercial vehicle. After formulating the governing equation of motion, an appropriate size of damper is designed and manufactured. Following the equation of fie d-dependent damping force characteristics, a semi-active seat suspension installed with the proposed MR-damper is constructed and its dynamic model id established, Subsequently, vibration isolation performance of the semi-active suspension system is demonstrated by incorporating with a MRAC(Model referenced adaptive control) fer the MR Seat Damper

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Numerical Kinematic Analysis of the Standard Macpherson Motor-Vehicle Suspension System

  • Attia, Hazem-Ali
    • Journal of Mechanical Science and Technology
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    • 제17권12호
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    • pp.1961-1968
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    • 2003
  • In this paper, an efficient numerical algorithm for the kinematic analysis of the standard MacPherson suspension system is presented. The kinematic analysis of the suspension mechanism is carried out in terms of the rectangular Cartesian coordinates of some defined points in the links and at the kinematic joints. Geometric constraints that fix the distances between the points belonging to the same rigid link are introduced. The nonlinear constraint equations are solved by iterative numerical methods. The corresponding linear equations of the velocity and acceleration are solved to yield the velocities and accelerations of the unknown points. The velocities and accelerations of other points of interest as well as the angular velocity and acceleration of any link in the mechanism can be calculated.

전기변성유체를 이용한 연속가변 현수장치 시스템의 디자인 및 성능에 관한 연구 (A Study on the Design and Performance of Continuously Variable Suspension System using Electro-Rheological Fluids)

  • 장문석;김수태
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 추계학술대회 논문집
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    • pp.543-546
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    • 1997
  • The purpose of this study is to investigate the ERSU(Electr0-Rheological Suspension IJnit) and some progress of damping force characteristic of a ERSU. This paper describes overall construction of th'e system design and the manufacturing of ERSU. A model of the ERSU is made by using electric field dependent on Bingham properities of ER fluid. In this paper. the ERSU is designed and manufactured for a light ground tracked vehicle. From the results, it is shown that the damping performance of ERSLJ is better than that of a passive suspension unit. This experimental study might be very useful for the simulat~on and the design of semi-active suspension units.

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MR 댐퍼를 장착한 상용차 시트 서스팬션의 승차감 평가 (Ride Comfort Evaluation of Seat Suspension of Commercial Vehicle with MR Damper)

  • 신도균;도쑤웬푸;최승복
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2014년도 추계학술대회 논문집
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    • pp.32-33
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    • 2014
  • This paper presents control performances of a seat suspension system equipped with magnetorheological (MR) dampers using a new adaptive fuzzy sliding mode controller (FSMC). Adaptive fuzzy controller is formulated by considering the acceleration of the seat. It has been demonstrated that the proposed seat suspension system realized by the adaptive fuzzy sliding mode controller can provide effective performances such as reduced vibration.

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