• Title/Summary/Keyword: Driving Part

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Study on the Shape Review of Rail Web-damper for Simulation of Rail Vibration Mode (레일 진동모드 해석을 통한 레일 웹댐퍼 형상 검토에 관한 연구)

  • Kim, Jin-Ho;Kim, Kyoung-Min;Lee, Kwang-Do
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.2866-2869
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    • 2011
  • Concrete track to increase R&D compared to the existing gravel track 3dB(A) over the growing problem of noise has been raised. Accordingly, the noise reduction solutions for reducing the vibration of the rail that you want to reduce the noise of the concept is to develop the rail web-damper. For this purpose, first, that occurs while driving the train to simulate the vibration modes of rail vibration part of the main draw for this part of the effective vibration reduction to be made, a review of various shapes to try.

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Verification and Validation of Dynamic Clearance in Digital Mockup Using Engine Movement Roll Data (엔진 거동을 고려한 DMU(Digital Mockup)에서의 다이나믹 간격 검증)

  • Kim, Yong-Suk;Jang, Dong-Young
    • Transactions of the Korean Society of Automotive Engineers
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    • v.18 no.5
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    • pp.56-61
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    • 2010
  • This paper presents dynamic clearance verification considering engine movement for vehicle engine room package and validates through physical vehicle test. Traditionally, static clearance guide has been used for engine room package, but it's only 2-dimension criteria that results in requiring unnecessary space and it's not possible to conduct engine movement with real driving conditions. Thus, the dynamic DMU considers engine movement based on 28 load cases that are Roll Data analyzed by CAE for maximum engine movement and visualizes part-to-part dynamic clearance into virtual space. The dynamic DMU enables to develop compact engine room package without unnecessary space. The result of comparison between simulation and physical test has 0.892 correlation coefficient.

A Study on Absorption Device of Surge Rising Pressure Occurring when Suddenly Braking Action in the Hydraulic Driving Part of Textiles Let off (섬유송출 유압구동부 급제동시 발생하는 충격상승압 흡수장치에 관한 연구)

  • 이재구;김정현;김도태;김성동;정선환
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.12 no.1
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    • pp.84-91
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    • 2003
  • The equipment of textiles let off is a part of inspection machine which inspects finished textiles and it checks up textiles through that. This study suggests a method to select the capacity and initial gas pressure of accumulator to control surge rising pressure occurring when suddenly braking action to a desired degree. An accumulator in hydraulic systems is by hydraulic machinery which stores kinetic energy of inertia body during braking. A series of computer simulations were done for the brake action The results of the simulation work were compared with those of experiments.

Development of Analysis System for Display Characters of FPD (FPD 화상특성 평가시스템 개발)

  • 송준엽;박화영;김현종;정연욱;김용래
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.335-338
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    • 2004
  • In this study has developed analysis system for automatic inspection of FPD(Flat Panel Display) characteristic, such as brightness, view angle, color ratio in the manufacturing process. Developed system consists of inspection-sensor part, acquiring a data by 3-CCD Color CCD camera and Inspection-stage part, driving a FPD holder to rotation and tilt direction. In experiment results, we could have ensured easily brightness distribution, available view angle, color reproduce and could expect to improve the quality, productivity, and yield.

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A Study of Strength Property and Durability on Automotive Front Bumper Guard by Configuration (형상 별 자동차 프런트 범퍼 가드에 대한 강도 특성 및 내구성 연구)

  • Han, Moon-Sik;Cho, Jae-Ung
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.17 no.3
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    • pp.28-33
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    • 2018
  • The automotive front bumper guard is the most important part of the vehicle for protecting the life of driver when a traffic accident happens. In order to ensure safe driving, this part must possess sufficient strength and durability. This study was carried out with structural and fatigue analyses by designing front bumper guard models. After the lowest value for maximum total deformation and equivalent stress was found through structural analysis and the highest value for fatigue life was found for all three models, it was shown that the type C front bumper guard model was the most suitable for application to a real car. The strength property and durability of the optimum design were determined through this study's results.

The Construction and Investigation of The 1/4 Wavelength Thermoacoustic Refrigerator (1/4파장 열음향 냉동기의 제작 및 성능시험)

  • Song, Kyu-Joe;Park, Jong-Ho;Lee, Sung-Ro;Lee, Jae-Ho
    • Proceedings of the KSME Conference
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    • 2001.11b
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    • pp.223-228
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    • 2001
  • The thermoacoustic refrigerator has not only considerable possibility but also commercial usability, because it has high reliability, lower vibration, no moving part, and can easily be constructed. In this study, The thermoacoustic refrigerator were constructed. The apparatus is capable of driving closed systems containing He or air at mean pressures ranging from 1-9.3 bar, at frequencies ranging from 100-1000Hz. The resonance characteristics of the thermoacoustic refrigerator were investigated for better performance, The resonance tube is 340.5mm in length. In case of using air as a coolant. Freezing frequency is 174Hz, In case of using He as a coolant Freezing frequency is 625Hz. Using He, The cold-part temperature of the heat exchanger fell to 23.7C after 120 minutes in 70W.

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Air Resistance Due to the Deflector Configuration of Commonly Used Largetrucks (상용 대형 트럭의 디플렉터 형상에 따른 공기저항력)

  • Han, Moonsik;Cho, Jaeung
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.23 no.2
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    • pp.138-144
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    • 2014
  • This study investigates the air resistance due to deflector configurations of commonly used largetrucksat a driving speedof 80 km/h. Of the 6 models that are considered, the drag causedby the pressure on the front part of the trailer is largest for model 1. For model 1, the lift caused by the difference between the velocities of the upper and lower streams isgreatest amongall the models. Model 6 has the least resistance against the flow stream consideringthedrags and lifts of theflow models. Anoptimal design can be obtainedby investigating thesimulation analysis ofvarious deflector configurationsfor the upper part of largetrucks; this optimum deflector configuration will help reduce the air resistanceon large trucks.

Analysis of coupled effect for 4-wire actuator of optical disc (광디스크용 4-wire 액츄에이터의 연성효과에 관한 해석)

  • 한창수;서현석;이정현;원종화;김수현;곽윤근
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1996.11a
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    • pp.351-355
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    • 1996
  • In optical disc system, lens actuator of 4-wire has unwanted moment which occurs tilt. The moment around the axis pallet to the tangential direction of the disk occurs to the moving part. when the moving part is moved in tracking direction and focus driving force is applied. This paper analyzed coupled effect due to the moment based on structural analysis and magnetic field analysis, both using finite element method.

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Modeling for Traction system of the Vehicle including Running Characteristics (주행특성을 고려한 차량 견인시스템 모델링)

  • Byun, Yeun-Sub;Kim, Young-Chol
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.56 no.11
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    • pp.1955-1961
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    • 2007
  • In this paper, we propose the mathematical model for the vehicle system including running characteristics. The well defined model for a system is necessary to study and to enhance system performance. To model the dynamic properties of vehicle system, we have considered two fundamental parts. The first part is the motion equations for vehicle based on Newton's second law. The second part is the torque dynamics of the traction motor. These parts are affected by outer conditions such as adhesive coefficient, running resistance and gradient resistance. The each parts are presented by the numerical formula. To test the driving characteristics of the developed model, we performed the simulations by dynamic system simulation software, "SIMULINK" and the results are given for several conditions.

A Study on the Reduction of Cogging Force of Stationary Discontinuous Armature Linear Synchronous Motor Using Auxiliary Teeth

  • Kim, Yong-Jae;Lee, Kyu-Myung;Watada, Masaya
    • Journal of Magnetics
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    • v.16 no.3
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    • pp.281-287
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    • 2011
  • The stationary discontinuous armatures that are used in permanent magnet linear synchronous motors (PM-LSMs) have been proposed as a driving source for transportation systems. However, the stationary discontinuous armature PM-LSM contains the outlet edges which always exist as a result of the discontinuous arrangement of the armature. For this reason, the high alteration of the outlet edge cogging force produced between the armature's core and the mover's permanent magnet when a mover passes the boundary between the armature's installation part and non-installation part has been indicated as a problem. Therefore, we have examined the outlet edge cogging force by installing the auxiliary teeth at the armature's outlet edge in order to minimize the outlet edge cogging force generated when the armature is arranged discontinuously. Moreover, we obtained the calculation by analyzing the shape of the auxiliary teeth in which the outlet edge cogging force is minimized the most.