• Title/Summary/Keyword: a full car model

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Development of an F-125 Machine Using 3D PLM Systems (3D PLM 시스템을 이용한 F-125 차량의 개발)

  • Lee S. H.;Lee K.-S.
    • Korean Journal of Computational Design and Engineering
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    • v.10 no.2
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    • pp.77-88
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    • 2005
  • This paper introduces a project for the development of an F-125 machine using 3D PLM systems including 3D CAD, CAM, CAE, PDM, and DMU systems. Here, the F-125 machine is a formula racing car equipped with a 125cc motorcycle engine. A development process and computer-integrated environment was established using 3D PLM systems on the conceptual basis of concurrent and virtual engineering. A DMU model for a full vehicle was built using CATIA V.5 and used to check interference between parts and to simulate assembly process. This DMU-based approach enables to find and fix manufacturing problems in the early design stage. All development activities have been done by the graduate and undergraduate students of the automotive engineering department of Kookmin University. Through the project, the students could acquire knowledge about car development process and 3D PLM systems in automotive industry.

Crush Analysis of a TTX M-Car Design (TTX 구동차 설계안의 충돌압괴특성 분석)

  • Jung Hyun-Seung;Kwon Tae-Soo;Koo Jeong-Seo;Cho Tae-Min
    • Proceedings of the KSR Conference
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    • 2004.10a
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    • pp.616-621
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    • 2004
  • In this paper, the crush characteristics of a tilting train express (TTX) M-car design are evaluated with a head-on collision scenario. Its body shell is divided into three parts - front end, middle section, and rear end. For each part, crush-force relation is evaluated numerically through 3-dimensional shell element analysis with LS-DYNA. TTX's embody structure is a hybrid type structure made of steel and composite materials. Composite sandwich panels are modeled as layered shells whose layers have different material properties. And a damage material model is used to consider the effect of stiffness degradation during deformation. The crush characteristics obtained from these calculations will be used as material modeling data of full-rake collision analyses.

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Vehicle Dynamic Simulation Including an Artificial Neural Network Bushing Model

  • Sohn, Jeong-Hyun;Baek-Woon-Kyung
    • Journal of Mechanical Science and Technology
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    • v.19 no.spc1
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    • pp.255-264
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    • 2005
  • In this paper, a practical bushing model is proposed to improve the accuracy of the vehicle dynamic analysis. The results of the rubber bushing are used to develop an empirical bushing model with an artificial neural network. A back propagation algorithm is used to obtain the weighting factor of the neural network. Since the output for a dynamic system depends on the histories of inputs and outputs, Narendra algorithm of 'NARMAX' form is employed to consider these effects. A numerical example is carried out to verify the developed bushing model. Then, a full car dynamic model with artificial neural network bushings is simulated to show the feasibility of the proposed bushing model.

Structure-Fluid Interaction in a Coupled Vibroacoustic System (진동-음향 연성계의 구조-유체 상호작용)

  • 최성훈;김진오
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 1996.10a
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    • pp.135-141
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    • 1996
  • Numerical analysis techniques have been applied to obtain the vibroacoustic characteristics of the simplified model of a passenger-car cabin. Two kinds of coupled vibration-acoustic analysis, such as one-way coupling and full coupling, have been carried out via the interface between the results of vibration analysis by FEM and acoustic analysis by BEM. The comparison of two coupled analysis results show the fluid-structure interaction in terms of the coupled effect of the vibration and noise.

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Design of Non-linear Observer to Estimate Yaw Rate and Sidel Slip Angle (Yaw Rate 및 Side Slip Angle 추정을 위한 비선형 관측기 설계)

  • Song, Jeong-Hoon
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.11 no.5
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    • pp.48-53
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    • 2012
  • A non-linear vehicle model and an observer are designed to observe the yaw rate and the body side slip angle when a vehicle is turning maneuver in this study. The developed vehicle model is a full car model and has fourteen degree of freedom. A Luenberg observer is applied to develop the observer. The vehicle model is validated with a reference result and shows good accordance. The observer is tested on dry asphalt, wet asphalt and snow paved road. The results prove the performance of observer is robust and reliable.

Experimental Modeling of MR Damper for Cruise Bus (우등버스용 MR 댐퍼의 실험적 모델링)

  • Sohn, Jeong-Hyun;Jun, Chul-Woong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.35 no.8
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    • pp.863-867
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    • 2011
  • In this paper, we analyze the characteristic test results of an MR damper for a cruise bus, and we model the nonlinear hysteretic characteristics of the damper using arctangent and polynomial functions. We establish an experimental model of the MR damper according to the input current, and we set the model parameters using the MATLAB Optimization Toolbox. The model is verified via a computer simulation of a full-car model.

Matching Simulations with Tests of Cruise Bus Using Multi-body Dynamics Technology (다물체동역학기법을 이용한 고급버스의 전차량 시뮬레이션과 시험의 매칭)

  • Choi, So-Hae;Park, Seong-Jun;Lee, Jeong-Han;Yoo, Wan-Suk;Sohn, Jeong-Hyun
    • Transactions of the Korean Society of Automotive Engineers
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    • v.18 no.6
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    • pp.14-22
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    • 2010
  • In this study, a large bus is tested for measuring the steering response based on the slarom test and step steer test. A full car model by using ADAMS/Car is established for computer simulation. For bus modeling, user defined templates are made and used in the simulation. Simulation results according to the slarom and step steer test are compared to the physical experiments, in which several sensors are installed to measure vehicle responses. The results obtained from the comparison show a good agreement with regard to the vehicle velocity and steering angle.

Vehicle Dynamics Modeling and Correlation Using the Kinematic and Compliance Test of the Suspension (현가장치 기구정역학 시험에 의한 차량동역학 모델링 및 시험검증)

  • Kim Sangsup;Jung Hongkyu
    • Transactions of the Korean Society of Automotive Engineers
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    • v.13 no.1
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    • pp.109-118
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    • 2005
  • A functional suspension model is proposed as a kinematic describing function of the suspension that represents the relative wheel displacement in polynomial form in terms of the vertical displacement of the wheel center and steering rack displacement. The relative velocity and acceleration of the wheel is represented in terms of first and second derivatives of the kinematic describing function. The system equations of motion for the full vehicle dynamic model are systematically derived by using velocity transformation method of multi-body dynamics. The comparison of field test results and simulation results of the ADAMS/Car demonstrates the validity of the proposed functional suspension modeling method. This model is suitable for real-time vehicle dynamics analysis.

Performance Evaluation of a Semi-Active ER Damper with Free Piston and Spring (부동피스톤과 스프링을 갖는 반능동 ER댐퍼의 성능평가)

  • Choe, Seung-Bok;Kim, Wan-Gi
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.24 no.3 s.174
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    • pp.691-700
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    • 2000
  • This paper presents a novel type of a semiactive damper featuring an electro-rheological(ER) fluid. Unlike conventional cylindrical ER damper, the proposed one has controllable orifices by the intensity of electric fields (We call it orifice type). The dynamic model of the orifice type ER damper is formulated by incorporating field-dependent Bingham properties of an arabic gum-based ER fluid. Design parameters such as electrode gap are subsequently determined on the basis of the dynamic model. After manufacturing the orifice type ER damper, field-dependent damping forces and damping force controllability are empirically evaluated. In the evaluation procedure, conventional cylindrical ER damper is adopted and its performance characteristics are compared with those of the orifice type ER damper. In addition, the proposed one is installed with a full-car model and its vibration control performance associated with a skyhook controller is investigated.

Optimal design of car suspension springs by using a response surface method (반응 표면 분석법을 활용한 자동차용 현가스프링 최적화 설계)

  • Yoo, Dong-Woo;Kim, Do-Yeop;Shin, Dong-Gyu
    • Proceeding of EDISON Challenge
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    • 2016.03a
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    • pp.246-255
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    • 2016
  • When spring of the suspension is exerted by an external load, a car should be designed to prevent predictable damages and designed for a ride comfort. We used experiments design to design VON-MISES STRESS and K, a constant, of spring of suspension which is installed in a car as a goal level. We analyzed the result from Edison's Elastic - Plastic Analysis SW(CSD_EPLAST) by setting D, d, n as external diameter of coil, internal diameter of coil, the number of total coil respectively. The experiment design let the outcome be as Full-second order by using Box-Behnken which is one of response surface methods. Experimented and analyzed results based on the established experiments design, We found out design parameter which has desired VON-MISES STRESS and the constant K. Additionally, we predicted life time of when the external load was exerted by repeated load by using fatigue equation, and verification of plastic deformation has also been made. Additionally we interpreted a model, which is formed by optimized design parameter, with linear analysis and non-linear analysis, at the same time we also analyzed plastic deformation with the values from the both models. Finally, we predicted fatigue life of optimized model by using fatigue estimation theory and also evaluated a ride comfort with oscillation analysis.

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