한국기계기술학회지 [Journal of the Korean Society of Mechanical Technology]

간행물 정보
  • 자료유형
  • 발행기관
    한국기계기술학회 [Korean Society of Mechanical Technology]
  • ISSN
  • 간기
  • 수록기간
  • 등재여부
    KCI 등재
  • 주제분류
    공학 > 기계공학
  • 십진분류
    KDC 550 DDC 621
제11권 제4호 (22건)



1인승 모션 시뮬레이터의 동적 거동 해석


한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.1-6

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Motion simulator is a mechanism that creates the feelings of being to occupants in a moving vehicle. Many types of motion simulators or platforms have been developed in the area of aerospace or automobile. A single-seated motion simulator was developed according to the extension of amusement market. The personal simulator that is interactive with a personal computer can move with rolling or pitching motion by the control of a racing wheel or joystick. The dynamic behavior of the motion simulator was obtained by kinematic and multi-body dynamic analysis. Reaction forces and moments from the analysis were used to calculate the stress distribution of the base frame that is one of major structural parts of the simulator. The stress result represented that high stresses were concentrated on the connected parts with ribs.



차량동역학 시뮬레이션을 위한 가상노면 설계에 관한 연구


한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.7-13

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An automotive company have developed corporate requirements for vehicle characteristics for dynamic response which must be met before a product is delivered to the customer. To provide early predictions of vehicle handling performance, prior to the construction and testing of prototypes, it is necessary to predict dynamic behavior due to road inputs. This paper describes an application of the “virtual proving ground” approach for vehicle handling characteristics for a vehicle on proving ground road surfaces. I developed generation program of the virtual road profile for vehicle dynamics simulation.



하천수 열원 이용 열펌프 시스템 경제성 분석

박차식, 안태길, 김영우

한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.15-20

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The performance of a heat pump using river water as a heat source was compared with that of a conventional air-conditioner for cooling and a boiler system for heating. The heat pump system using river water considered the 1-stage cycle for cooling and the 2-stage cycle for heating. The COPs of the river water source heat pump were 0.5-1.1 higher than those of the conventional system in the cooling season. The LCC of the river water source heat pump system was lower 13.5% and 32.4% than that of the conventional system Ⅰand Ⅱ. In addition, when the initial cost ratios of the river water source heat pump system to the conventional system Ⅰand Ⅱ were less then 1.2 and 1.4, respectively, An acceptable payback was found to be less than 5 years.



근적외선건조시스템의 열전달특성에 관한 연구


한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.21-27

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The researcher inquired drying characteristics by reflecter shape. Near infrared ray (NIR) is very useful in various drying field. The researcher compared and investigated, temperature about reflecter's shape with numerical analysis method and experimental method. The researcher also investigated about distance between a lamp and a drying target plate using experimental method. As far as a experimental method is concerned, the researcher used the thermal image processing system for changing distance between a lamp and a drying target plate into H=500mm, 600mm and 700mm. Also presented experimental results are compared about thermal image for temperature distribution at each cases. As a result, the researcher has come to the H=700mm about best result in this study.



에너지사용계획 협의대상 확대에 따른 효과분석


한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.29-35

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The Consultation about Energy Use Plan is prescribed by the Rational Energy Utilization Act. The Consultation about Energy Use Plan submitted by only the public superintendent of project was enforced from 1999. The Consultation was enlarged in objects as including the private superintendent of project according to amendment of the Act in 2002, also the consultation was enlarged in objects of facilities etc. by amendment in 2006. The results of analysis shows that the mean annual energy intensity value per 103 ㎡ is 86.5toe, mean annual CO2 emission intensity per 103㎡ is 61.7TC and the mean annual energy saving effect is 13.0%, mean annual CO2 reduction effect is 13.4%, these effects equivalent to 0.33% of 2005 national primary energy consumption. Also benefit-cost ratio of whole objects is 1.67 and benefit-cost ratio of enlargement objects is 1.93, it means economic and social effect with the Consultation about Energy Use Plan are very excellent.



VCHP의 작동특성에 관한 연구

강환국, 조운

한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.37-43

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The operational characteristics of a VCHP in the various operation conditions were investigated. A water heat pipe including nitrogen gas as a non-condensable gas was designed and manufactured using a copper tube with 12.7㎜ diameter and 480㎜ length. Experimental data showed that the length of non-active zone mostly depend on the temperature of the vapor and the non-condensable gas. And the heat flow rate was negligible parameter at the same vapor temperature in the range of the experiment. As the vapor temperature increase and the non-condensable gas temperature decrease, the non active zone was increased. The calculated data by using the flat front model and the experimental results showed same tendency.



실내채광을 위한 평판형 굴절렌즈 설계


한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.45-49

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Indoor Lighting can be improved by using a refractive lens. This lens is a flat-plate, and patterns are engraved on its surface. The engraved patterns are designed to refract sun's rays. In this study, two patterns have been suggested. The one is designed to refract sun's rays in one direction. The another is designed to refract sun's rays in 4 directions. The designed patterns were machined with a diamond tool and engraved on an experimental Poly Methyl Meta Acrylate flat-plate. Optical experiments have been done by using a laser rays and natural sun's rays. The results showed that sun's rays refracted in one or 4 directions effectively. The refracted rays also improved indoor lighting.



사고차량의 수리용 비순정 부품과 순정부품의 성능에 관한 연구

조휘창, 박인송

한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.51-56

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The purpose of this study was to investigate the performance and quality of engine mounting member in repair parts of the accident vehicles by conducting mechanical and material properties experiments. The tests were conducted by the test equipments of chemical components analysis, radiographs and mechanical testing on the genuine parts and non-genuine parts of engine mounting member. Test results concluded; Tensile strength of genuine parts is about 270 N/㎟ but damaged non-genuine parts about 200 N/㎟. The chemical component of 12 components was similar genuine part to non-genuine parts but Ti, Ni component were appeared different. Non-genuine parts were 4 times in elongation, 2 times in hardness higher than genuine parts. We concluded that quality identification system of repair parts and circulation system establishment of repair parts market were needed.



가상노면을 사용한 자동차 부품의 피로수명 해석


한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.57-63

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For the stress and vibration analysis of vehicle components by computer simulation, it is necessary to find the forces acting on the vehicle components due to the road profile undulation. A precise modeling of tires is not easy due to nonlinear effects between tire-ground. Instead of precise tire modeling, this paper proposes to regenerate the road profile, which preserves the measured wheel accelerations with a linear tire model in the computer simulations. From the full car example, the proposed method in this paper shows very nice results, and thus the new method seems well-suited in virtual driving simulations. The effort to improve durability of vehicle components has been continued during test and development process. Computer aided durability analysis techniques cut down time and money compared with experiment. In this paper, the dynamic simulation of vehicle model was carried out with the MSC/ADAMS program and the durability analysis of vehicle components was carried out with MSC/Fatigue program by using load profiles generated from dynamic simulation.



1자유도 MEMS 매니퓰레이터의 운동 해석에 관한 연구

안영명, 유재명

한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.65-72

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Recently, many MEMS manipulator or mechanisms have been developed for application in nanotechnology and optical sensors. In this paper, the method that is measurement and analysis of the motion-ability is introduced for 1 degree of freedom MEMS Manipulator. To do this, the MEMS manipulator is fabricated on the SOI wafer. It is comprised of a parallel bi-lever flexure mechanism and a bent-beam thermal actuator. The flexure mechanism is comprised of an actuator input stage, four lever arms, ten circular flexure hinges, and an output stage. Each flexure hinge provides a point of compliance and acts similar to a rotational joint with an attached rotational spring. These components are significantly stiffer than the flexure hinges, so that they act as rigid bodies in the plane of motion. The static and dynamic parameters of fabricated manipulator are measured and analysis by 3D optical profiling system. It contains a CCD camera, a field-of-view (FOV) lens, a filter assembly, and an illumination source. Light from the illuminator travels through the system and is reflected down to the objective by a beamsplitter. Once the light reaches the objective, another beamsplitter separates the light into two beams. One beam, the reference beam, reflects form a super smooth reference mirror in the objective, while the other reflects form the surface of the sample and back to the objective. With this system, we can measure and analyze the resolution, accuracy, precision, stability and responsibility of MEMS manipulator and it is very useful for fabrication or application of improved manipulator without surface damage.



MRF 댐퍼 응용 야지주행차량의 승차감 제어기법에 관한 연구


한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.73-79

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In this paper, the damping force of MRF(Magneto-Rheological Fluid) damper using Bingham-plastic model is studied and the performance of quarter car model using this damper is numerically analyzed. As a control algorithm, the sky-hook control is used for its convenience and effectiveness. The transmissibility of sprung mass and unspung mass is compared to that with the conventional passive damper and the feasibility of MRF damper is evaluated. And the design concept of fail-safe MRF damper is suggested to provide the damping force of conventional passive damper level in the case of controller malfunction. The control current and damping force is analyzed passing over the harmonic bumper.



산소성분 포함 연료의 디젤기관 적용 연구


한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.81-86

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Our environment is faced with serious problems related to the air pollution from automobiles in these days. In particular, the exhaust emissions from diesel engine are recognized main cause which influenced environment strong. In this study, the potential possibility of biodiesel and oxygenates additives (dimethoxy methane) was investigated as an alternative fuel for a naturally aspirated direct injection diesel engine. The smoke emission of blending fuel(biodiesel 90vol-% + DMM 10vol-%) was reduced in comparison with diesel fuel, that is, it was reduced approximately 70% at 2500rpm, full load. But, power, torque and brake specific energy consumption didn't have no large differences. But, NOx emissions withg biodiesel and DMM blended fuel had been increased compared with commercial diesel fuel.



CFD에 의한 밸러스트수 여과용 Hydrocyclone의 유동특성에 관한 연구


한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.87-92

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Ballast water of ten billion tons are transferred by the ship annually in the world. Because alien creatures are destroying aquatic ecosystems, ballast water treatment is needed. Physical methods of treatment using the filtration method is hydrocyclone. The advantage of hydrocyclone is to create a simple structure and a easy separation of good performance. A commercial CFD code CFX 11.0 is applied to analyze hydrocyclone. According to the shape changes of the hydrocyclone, separation performance was compared. The results show that when you reduce the height of hydrocyclone, hydrocyclone separation efficiency is lowered.



극저온 수조내기기 성능시험

박국남, 우상익, 김영기

한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.93-99

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The Cold Neutron Research Facility(CNRF) is being built to produce a cold neutron which has peculiar physical property. In-Pool Assembly(IPA) was manufactured in a domestic factory, which is composed of moderator cell, heat exchanger, vacuum chamber, joint flange assembly and bracket etc. We had difficulties with the mechanical fabrication process due to the thin moderator cell. The special flange for the double flexible piping was developed. The tests of moderator cell, heat exchanger, vacuum chamber, double flexible pipe and IPA include the pressure test, normal temperature leak test and low temperature leak test. The moderator cell and heat exchanger were tested in the severe environmental condition and the burst tests of moderator cell were carried out. Above all, the bursting point took place at the area of the 0.01mm thinner place. It shows that the severe environmental test affects the bursting strength. The double flexible pipe welding at the IPA top plate was related with the arrangement of moderator cell in the vacuum chamber. Therefore the connecting welding of the double flexible pipe linked to sequent of the vacuum piping, helium piping and hydrogen piping. The fabrication, test and assembling of cryogenic in radiation zone were developed.






Modification of the pool-wall pipe support for the Fuel Test Loop in HANARO

J. M. LEE, C. Y. LEE, S. K. PARK, S. H. AHN

한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.105-112

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The fuel test loop consisted an in-pile test section (IPS) and an out-pile system (OPS) is an nuclear fuel irradiation test facility installed in HANARO and its operating temperature and pressure are similar to those of commercial nuclear power plant’s. Penetration pipe connecting the IPS and OPS at the reactor concrete wall is supported by pool-wall pipe support. The existing pool-wall pipe support established in the HANARO have insulations even thought the leak tightness is not ensured. So, the need for an isolation of the insulations from the HANARO cooling water makes the existing pool-wall pipe support newly designed. In this study a structural evaluation for the pool-wall pipe support in accordance with the 2001 ASME B&PV Section III NF is implemented. The most critical primary and secondary stress intensities occur at the modified connection area of the main cooling water pipe and plate ring, but those values are less than the allowable stress. It is concluded that the existing pool-wall pipe support could be modified to a newly designed shape having an isolated insulation from a HANARO cooling water.



중유와 폐식용유의 온풍 난방기 연소특성

곽기주, 조기현, 강정일, 정형길

한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.113-117

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This study was carried out to investigate of the combustion characteristics for the waste edible-oil and heavy oil on hot air heater. There was highly reduction in energy cost using by the hot air heater. The hot air heater to study with duct connector type, and the motor output was 2.2kW. The experimental factors for performance test, fan speed ranged from 1700 rpm to 1800rpm, and SFC, efficiency, exhaust gas emissions, and noise were measured. The results obtained were as follows; efficiency were increased to 87% at the heavy oil and was decreased to 79% on the waste edible-oil. The fuel consumption was decreased to 25L/h at the heavy oil and CO2 emissions was decreased in the case of the heavy oil



차체 미세 홀 가공을 위한 절단 시스템 개발


한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.119-127

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Recently, the automatic laser-piercing has become a subject of growing research area in the hydroforming of car body and robotic fields. Generally, the laser-cutting with 6-DOF robot system has 3D error due to a gear backlash and inaccurate calibration method between sensor and cutting-tool. The objective of this article is to study the automatic laser-cutting for the micro-hole piercing of engine cradles. The development of redundant micro-control module and laser vision sensor contributes to the implementation of precise laser cutting. To obtain higher a performance of control module, the calibration algorithm between cutting-tool and laser sensor is required. The implementation of this methodology will be describe. The optimal path generation for a good quality of cutting section is also explained in detail. The experimental results demonstrate the successful operation in the automatic micro-hole piercing. It shows a validity of the micro-motion mechanism and robot‘s calibration algorithm in laser sensor.



디지털디자인기법을 활용한 정밀소형 커플러 개발


한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.129-133

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The purpose of this paper is to investigate the design review technique for development of the zinc die casting component. Adaptive process design using computer simulation and optimization has recently garnered a great deal of attention and much progress has been made through research in this area. In this study, the adaptive flow simulation for the gate, runner, overflow has been done to the zinc die casting product which is used in development of automotive components. In order to develop the tooling design, the 3-dimensional modeling and computer simulation method have been applied to prove design compatibility of protype product. This investigation will guide to valuable aid for those who want to develope prototype tooling.



건식 무단변속기 구동풀리의 시뮬레이션

이한성, 오선

한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.135-141

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Dry CVT(Continuously variable transmission) consists of a driving pulley and a driven pulley joined by rubber V-belt. Each pulley consists of a fixed flange and a movable flange. The movable flange of the driving pulley has centrifugal rollers and a ramp plate in it. The movable flange moves toward a fixed flange under the actuation of a centrifugal roller, as the driving pulley speed increases. In this study, computer simulation for a driving pulley was carried out for the purpose of analysis a Dry CVT. Based on the simulation we investigated relations between each omponent of driving pulley that consists of roller, movable flange and ramp plate



광 반사 및 삽입손실 측정에 관한 연구

조명현, 윤중현

한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.143-150

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The optical reflection and the insertion loss department measurement system are composed of the optical direction coupler which is deriving the optical transmission of a message part and reflected light to the department of sphere optical. The optical technology that can measure microscopic optical to the present 0~ -60㏈m and the technology that can derive the stable laser are guaranteed, and in a mass production step, the uniformity part is a problem that should be solved for measuring the different optical spare parts, and the part can be solved sufficiently through the algorithm of repeat error modification and moving average arithmetic way. In this paper, the source used the distributed feedback laser diode when λ = 1310㎚, λ = 1550㎚, and the receiving optical department used InGaAs pin photo diode. The measurement scope was 0 ~ - 60㏈m for the optical reflection loss and insertion loss, and the disjointing was 0.01㏈, and the stability displayed 0.1㏈/h.



파워 스티어링 밸브 밸런스 테스터 장치의 밸브 장착부에 대한 CAE 해석 및 제작

고석조, 박민규, 원태현, 이봉춘

한국기계기술학회 한국기계기술학회지 제11권 제4호 2009.12 pp.151-156

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Power steering gear is the part of an automobile. That converts circular movement of steering wheel into lateral movement of rack for changing driving direction. Recently power steering gear gets more common. A Korean company manufactures a speed sensitive power steering gear, which provides variable steering feel depending on speed of the car. However, the Broens company in Australia produces and exports the test equipments for manufacturing power steering valves. Some Korean companies import the test equipments from Broens and the maintenance cost gets increasing. The purpose of this study is development of the valve balance tester to measure the valve torque of the power steering gear. This study designed and manufactured a chuck and a jig of the valve balance tester to take hold of the power steering valve using CAE analysis.


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