• 한국항해항만학회:학술대회논문집
• /
• 한국항해항만학회 2002년도 추계공동학술대회논문집
• /
• pp.161-167
• /
• 2002

Cai-go management facility of harbor are required an expansion due to increase of cargo quantity. Design technology of Yard AGV call be possible to deal many cargo rapidly and accurately. So it is produced a profit about cal-go management. This study is presented optimum of suspension parameter for design technology Yard AGV. Model I, II are modeled about Initial of container weight, height. When the maximum stroke of suspension is 0.26m, optimum is achieved to reduce the reaction force at the minimum. Also, the reaction force is study to become stability in I second. A change of spring constant and coefficient of damper make change the reaction force and minimum reaction force appear in optimum value. All modeling and analysis are used combination. contact element of Ansys program.

• 디자인학연구
• /
• 제15권1호
• /
• pp.153-161
• /
• 2002

There exist various conventional ideas, but few ideas may be used for actual production of advertisements. Moreover, because we tend to obtain ideas primarily from the pictures, we rely more and more on data collections, and eventually, we tend to copy them. If there is an idea which designers and copy writers can share, it will be a very effective idea. On the other hard, we need to depart from the individualistic mannerism or the reset-oriented approach depending on incidental manual works and instead, develop a lecture program which helps students e strike systematic ideas centering around processes. In order tn solve such problems, the researcher attempts to suggest "Spring Method" which has heed verified through the advertisement design practice courses at college for 7 semesters. This method focuses on ′visualization of concept′ through such stages as compression, inference and expansion, and therefore, emphasizes an organic linkage between language-oriented idea process and visualization process for advertisement ideas.

• 오토저널
• /
• 제14권3호
• /
• pp.57-70
• /
• 1992

As automobile industry develope, design techniques to satisfy light weight and high efficiency in automobile parts is demanded. In this study modal analysis is performed using transfer matrix method to identify dynamic characteristics of exhaust system. It is estimated the theoretical transfer function by Pestel-Leckey method and the mode shapes in 3-D graphic. the validity of developed program is verified by comparing with the experimental results of exhaust system. Estimated modal parameters(natural frequency, vibrational mode, transfer function) are in accord with the experimental results. From the developed program, we can predict a location of the hanger which is determined by the lowest RMS value point, when displacement is given as an input at the engine side. We can find that attachment of spring modelled hanger at the hanger location bring vibration level down.

• 한국주거학회:학술대회논문집
• /
• 한국주거학회 2008년 추계학술발표대회 논문집
• /
• pp.211-216
• /
• 2008

The purpose of this study to suggest the design guide line for the community center through the analysis of the satisfaction of the community facility and program in apartment. This study was approached by using both thoretical investigation and questionnaire survey. Survey was done examining 5 different apartment in Gwang-ju, which were all built from the year 2005 to 2007 and 268 residents were collected for questionnaire survey. As the result of this study, the satisfaction and usage of community facilities and programs showed higher indoor exercise field including yoga, golf and health club than others. Also the result can be used a basic data when planning new community center.

• 한국기계가공학회지
• /
• 제18권7호
• /
• pp.36-41
• /
• 2019

The design of pressure plate for automotive clutch also has been improved. The tension of the clutch spring compresses the clutch plate onto the flywheel to deliver the power. In this study, three types of pressure plate for clutch were modelled by using CATIA program, and the structural analyses due to external forces were performed with ANSYS program. It is thought that this study result can be used to verify the stability and strength according to the shape of the pressure plate.

• 한국산업융합학회 논문집
• /
• 제23권1호
• /
• pp.73-81
• /
• 2020

This study analyzed the causes of failure of SCM435 bolts that fix the springs of automobile air brakes that have been fractured during use. The cause of failure was analyzed using SEM, EDS, metallogical microscope and Vickers hardness tester. In the fracture, the ratchet mark began at the outer boundary of crack origin, and the grains at crack origin were found to have clear intergranular corrosion. One SCM435 bolt was subjected to a stress of 398 MPa, it's a stress of about 80% of the fatigue limit. As a result of such a large applied stress, cracks occurred at the corrosion origin and were fractured. In order to prevent the SCM435 bolt from fracture, it is necessary to use the correct composition, the accuracy of heat treatment, preventing damage by external impact, preventing corrosion of the damage part by moisture, and introduction a compressive residual stress by peening.

• 공학교육연구
• /
• 제13권4호
• /
• pp.87-92
• /
• 2010

공학인증의 여러 인증 요건들 중의 하나인 프로그램 학습성과에 대한 평가와 분석등은 평가도구 개발이라는 관점에서만 보더라도 지속적인 연구가 필요한 분야이다. 본 연구에서는 본 프로그램 학습성과 평가체제에서 제시한 절차대로 졸업시험, 에세이, 종합설계, 그리고 공인 영어점수를 평가도구로 활용한 프로그램 학습성과 평가결과와 교과목 학습성과를 이용한 프로그램 학습성과 결과를 비교하였다. 4가지 평가도구를 활용한 프로그램 학습성과 평가는 2010년 심화과정 졸업자 15명을 대상으로 하였고, 교과목 학습성과를 이용한 프로그램 학습성과는 2009년 1학기와 2학기에 개설하여 운영한 교과목을 이용하였다. 두가지 평가결과 모든 학습성과 평가에서 큰 차이를 보이지 않는 것으로 보아 교과목 학습성과를 이용한 프로그램 학습성과도 프로그램에서 활용할 수 있는 실질적인 프로그램 학습성과 평가방법 중 하나임을 알 수 있었다.

• 한국주거학회:학술대회논문집
• /
• 한국주거학회 2009년도 추계학술발표대회 논문집
• /
• pp.245-250
• /
• 2009

A variety of change in modern society has affected a family structure. In addition birth rate is getting lower and nuclear family type is getting common, influence of children has highly increased. According to this phenomenon, needs and concern about education and culture for children increase sharply. Children cultural complex can be learning field, which helps children not only to rediscover the world by themselves but also to have various and abundant experience. The purpose of this study is going to extract a planning factor of the children cultural complex through case studies of korean and oversea project for adaptable children cultural complex. In addition, this study tries to analyze the features of the children cultural complex in korean and oversea. Consequently, The analysis result is to be introduced party room to children cultural complex, used the PVC tile and carpet tile for safety of children and variety, and executed program relevant to nature.

• 한국공작기계학회논문집
• /
• 제11권1호
• /
• pp.97-103
• /
• 2002

In the determination of control laws of semi-active suspension system, optimal control theory is applied, which used in the design of fully active suspension system and in the performance index sense. Optimal semi-active control laws are designed, and the computer program is developed fur estimation of performance In the time and frequency domain. It is certified that in the semi-active control system, it is desirable to minimize the spring constant and damping coefficient as possible in the given constraints. The effect of performance improvement which is almost equal to fully active type is obtained.

• International Journal of Precision Engineering and Manufacturing
• /
• 제7권2호
• /
• pp.60-65
• /
• 2006

A vibrational model of powder transfer equipment based on the lumped parameter method was developed, in which the operating motion consists of surging, bouncing, and pitching. After decoupling the equation of motion, the vibrational excitation source of the pitching motion was removed. So the designers are able to plan the optimum design to adjust the motion trajectory of the powder transfer equipment. That is, a procedure to adjust the motion trajectory of powder transfer equipment by changing design specifications such as the installation position, the direction of the motor, the driving speed, the mass unbalance, the stiffness coefficient, and the installation position of the support spring, is presented in this paper. The powder transfer equipment manufactured according to the results of this study did not suffer fatigue destruction, since the maximum stress on the basket structure was sufficiently small.