• 제목/요약/키워드: Mount angle

검색결과 46건 처리시간 0.023초

반도체 Sub-Fab 용 웨지 마운트 레벨러(Wdge Mount Leveler)의 마찰과 응력에 관한 연구 (A study on friction and stress analysis of wedge mount leveler in Semi-Conductor Sub-Fab)

  • 민경호;송기혁;홍광표
    • Design & Manufacturing
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    • 제11권2호
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    • pp.25-28
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    • 2017
  • Semiconductor equipment manufacturers desire to enhance efficiency of Sub Fab to increase semiconductor productivity. For this reason, Sub Fab equipment manufacturers are developing Integrated System that combined modules with multiple facilities. Integrated System is required to apply Mount Leveler of Wedge Type in compliance with weight increase compared with existing single equipment and product shape change. This thesis analyzes main design variables of components of Wedge Mount Leveler and carries out structure analysis using ANSYS, finite element analysis program Analysis shows that main design variables of components of Wedge Mount Leveler has self-locking condition by friction force of Wedge and adjusting bolt. Each friction force hinges upon Wedge angle and Friction Coefficient of contact surface and upon the thread angle and Friction Coefficient of contact surface. Also, as a result of carrying out structure analysis of Wedge Mount Leveler, deflection and stress appears in different depending on the height of the level.

엔진 마운트계의 최적설계에 관한 연구 (A Study on an Optimal Design of Engine Mount System)

  • 황원걸
    • 한국자동차공학회논문집
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    • 제6권1호
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    • pp.16-26
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    • 1998
  • The major effective factors on the ride quality of a vehicle are the vibration and noise of the engine and drive system. Engine contributes about 80% of the vibration and noise in the vehicle, and exciting forces of the engine are transmitted onto the vehicle frame through the engine mount. This paper studies the vibration reduction of a vehicle through the improvement of the engine mount. A computer program for optimal design is developed and the engine mount conditions are optimized to reduce the WRMS of PSD of acceleration at the driver's seat, which are caused by the exciting forces at the idle speed. Design variables are selected as the stiffness, mount angle and the location of the engine mount rubber. It is shown through computer simulation that the PSD of acceleration at the driver's seat can be improved by redesigning the engine mount system.

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태양광 어레이 설치 위치 및 각도변경 전후의 태양광 발전 시스템의 출력 변화에 관한 연구 (A Study on PV System Output Changes by PV Array Installation Position and Mount Angle Change)

  • 윤정필;차인수;최정식;김동묵;박종복;하민호;김원배
    • Current Photovoltaic Research
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    • 제2권4호
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    • pp.189-194
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    • 2014
  • In this paper, We have simulated the output variation of the PV arrays installation with position & angle change. The existing 3 solar array system are $43^{\circ}$ southeast and each of the mounting angle is $17^{\circ}$. The PV output power is 240 kW. The composite studied systems in this paper arrays altered 2 PV array among 3 PV array system- the output 144kW. We simulated this system using Solar Pro ver.4.1. The simulation conditions are southwest $43^{\circ}/array$, mount angle $27^{\circ}/array$. Because the southeast have shadow effect-higher mountain The purpose of southwest $43^{\circ}$ is reduce the shadow effect. The simulation results of the suggestion design algorithm compared to 1,590 kWh/year output is increased with the southeast.

비선형 특성을 적용한 파워트레인 마운팅 시스템의 마운트 전달력 해석 (Analysis of Mount Reaction Forces for Powertrain Mounting Systems using Nonlinear Characteristics)

  • 김진훈;이수종;이우현;김정렬
    • 동력기계공학회지
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    • 제12권2호
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    • pp.23-28
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    • 2008
  • The primary objective of this study is to truly understand reaction force be due to engine exciting force. Exciting forces of the engine apply a source of the vehicle NVH(Noise, Vibration, Harshness). To understand reaction force was applied MSC.Nastran software. Analyzed frequency response analysis of powertrain mount system. First, engine exciting force was applied field function. Also nonlinear characteristics was applied field function : such as dynamic spring constant and loss factor. And nonlinear characteristics was applied CBUSH. Generally characteristics of rubber mount is constant frequency. But characteristics of hydraulic mount depend to frequency. Therefore nonlinear characteristics was applied. Powertrain mounting system be influenced by powertrain specification, mount position, mount angle and mount characteristics etc. In this study, we was analyzed effects of powertrain mounting system. And we was varied dynamics spring constant and loss factor of mounts.

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중형트럭 시동 시 엔진마운팅 시스템의 진동 특성 연구 (A Study on Vibration Characteristics of Engine Mount System of a Medium Duty Truck at the Key On/Off)

  • 국종영;임정환
    • 한국자동차공학회논문집
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    • 제16권4호
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    • pp.97-102
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    • 2008
  • The vibration of a vehicle, which is caused by and transmitted from the engine, has significant effect on the ride comfort and the dynamic characteristics of the engine mount system have direct influence on the vibration and noise of the vehicle. This paper examines the body shake caused by the engine excitation force on engine key on/off of a medium truck by experiment and simulation. The analysis model consists of the engine, a body including the frame, front and rear suspensions and tires. The force element between the body and the suspension is modeled as a combination of a suspension spring and a damper. The engine shake obtained from the experiment was compared with the result of the computer simulation, and by using the verified computer model, parametric study of the body shake on engine key on/off is performed with changing the stiffness of an engine mount rubber, the engine mount angle, and the position of engine mounts.

머신비젼 기반의 엔진마운트 부품 자동공급시스템 (An Automated Machine-Vision-based Feeding System for Engine Mount Parts)

  • 이형근;이문규
    • 한국정밀공학회지
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    • 제18권5호
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    • pp.177-185
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    • 2001
  • This paper describes a machine-vision-based prototype system for automatically feeding engine-mount parts to a swaging machine which assembles engine mounts. The system developed consists of a robot, a feeding device with two cylinders and two photo sensors, and a machine vision system. The machine vision system recognizes the type of different parts being fed from the feeding device and estimates the angular difference between the inner-hole center of the part and the point predetermined for assembling. The robot then picks up each part and rotated it through the estimated angle such that the parts are well assembled together as specified. An algorithm has been developed to recognize different part types and estimate the angular difference. The test results obtained for a set of real specimens indicate that the algorithm performs well enough to be applied to prototype system.

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검안렌즈의 장착상태에 대한 연구 (Study on Mounting Status of Trial Case Lenses)

  • 조현국;문병연
    • 한국안광학회지
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    • 제18권4호
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    • pp.405-411
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    • 2013
  • 목적: 검안렌즈에서 렌즈마운트에 대한 렌즈의 장착상태를 알아보고자 하였다. 방법: 국내에서 유통되고 있는 임의의 검안렌즈에 대해 렌즈마운트의 기하중심과 렌즈의 광학중심사이 거리, 축 표시마크와 실제 축사이 각도의 차이를 조사하고 국제규격과 비교하였다. 결과: 일부 렌즈에서 렌즈마운트의 기하중심에서 발생되는 프리즘 굴절력, 원주렌즈의 축 표시마크와 실제 축사이 각도 차이가 국제규격의 허용오차를 초과하는 경우가 있었다. 결론: 정확한 시력검사를 위해 검안렌즈는 좀 더 정밀한 제조가 요구되며, 이를 위해 철저한 품질관리가 필요할 것으로 생각된다.

Optimal Design of a Coudé Mirror Assembly for a 1-m Class Ground Telescope

  • Jaehyun Lee;Hyug-Gyo Rhee;Eui Seung Son;Jeon Geon Kang;Ji-Young Jeong;Pilseong Kang
    • Current Optics and Photonics
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    • 제7권4호
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    • pp.435-442
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    • 2023
  • These days, the size of a reflective telescope has been increasing for astronomical observation. An additional optical system usually assists a large ground telescope for image analysis or the compensation of air turbulence. To guide collimated light to the external optical system through a designated path, a coudé mirror is usually adopted. Including a collimator, a coudé mirror of a ground telescope is affected by gravity, depending on the telescope's pointing direction. The mirror surface is deformed by the weight of the mirror itself and its mount, which deteriorates the optical performance. In this research, we propose an optimization method for the coudé mirror assembly for a 1-m class ground telescope that minimizes the gravitational surface error (SFE). Here the mirror support positions and the sizes of the mount structure are optimized using finite element analysis and the response surface optimization method in both the horizontal and vertical directions, considering the telescope's altitude angle. Throughout the whole design process, the coefficients of the Zernike polynomials are calculated and their amplitude changes are monitored to determine the optimal design parameters. At the same time, the design budgets for the thermal SFE and the mass and size of the mount are reflected in the study.

피에조 가속도 센서를 이용한 기울기 각도 검출 (The tilt angle detection using the piezoelectricity acceleration sensor)

  • 김진석;조영진;김영탁
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2004년도 춘계학술대회
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    • pp.946-949
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    • 2004
  • It is necessary to detect the tilt angle for control or monitoring of various systems such as ship, aircraft recreation facilities etc as well as bridge or building systems. However the electronic liquid charge type tilt sensor which is one of typical tilt sensor has many problems. Those are remarkably slow response time and limited mounting condition because or liquid viscosity coefficient and inertia etc. In this study we propose a tilt angle instrumentation method using piezoelectricity acceleration sensor. The method can he applied on moving mount We verified the validity of the method through experiment.

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