• 제목/요약/키워드: Assembly Frame

검색결과 158건 처리시간 0.028초

대용량 통신처리시스템의 전화망 정합 장치의 통신 모듈 구현 및 성능 분석 (Implementation and performance evaluation of the communications module of TNAS in the advanced CPS)

  • 김건석;조평동
    • 전자공학회논문지S
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    • 제34S권7호
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    • pp.9-18
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    • 1997
  • In this paper, we implemented the communication module in the Telephone Network Access Subsystem(TNAS) of the Advanced Communications Processing System(ACPS). We defined some kinds of communication tasks and related resources like several queues which are executed in real-time operating system, and implemented the procedures for processing the user information. Through traffic modeling and simulation, the performance of the Service Processing board Assembly(SPA) is evaluated in the aspets of system utilization and buffer size. The ACPS should accommodate various public networks such as public switch telephone network, packet switchen data network, frame realy netork, and ATM network. The communications module proposed in this paper could be used inthe interface beween the SPA and the High Speed Network Adaptor of other network interface subsystems.

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Nb 첨가 오스테나이트계 스테인레스강의 연속주조시 표면크랙 형성기구 및 제어 (Formation Mechanism of Surface Crack and Its Control on Continuously Cast Slabs of Nb-containing Austenitic Stainless Steel)

  • 심상대;김선구
    • 한국주조공학회지
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    • 제21권5호
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    • pp.280-285
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    • 2001
  • Nb-containing austenitic stainless steel is widely used as exhaust frame and diffuser assembly in power plant. However, this steel is known to be difficult to produce by the continuous casting process due to the surface cracks. Therefore, the continuous casting technology was developed for the prevention of the surface cracks on CC slabs. Precipitates and the analysis of heat trasfer in a slab were investigated in order to find out the formation mechanism of surface cracks on cc slabs It was found that surface cracks are occurred due to the NbC precipitates, which are formed along the grain boundaries around $800^{\circ}C$. The secondary cooling pattern has been developed to produce the defect free CC slabs of Nb-containing austenitic stainless steel.

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가속도 충격파형을 이용한 기기의 결함 위치분석 및 진단사례 (Case_study of detecting loose part by acceleration signal)

  • 유무상;박승도;박현철;최낙균
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2007년도 춘계학술대회논문집
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    • pp.463-468
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    • 2007
  • The abnormal sound of generator frame is analyzed by a acceleration signal. The spike-like time signal is major characteristics of impacting force. The distributional map of vibration level is one of visualization method. With map, noise source was easily detected. After de_assembly of generator, loose part of internal component is the source of impact force by mechanical movement of stator inherently. In contact condition of part with clearance, the level of impact signal is different at each revolution and impact signal did not happens periodically.

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도어 모듈 플레이트의 동특성 분석에 관한 연구 (A Study on the Dynamic Characteristics of Door Module Plate)

  • 배철용;김완수;김찬중;이봉현;장운성;모유철
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2007년도 춘계학술대회논문집
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    • pp.918-923
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    • 2007
  • Currently, automotive industries improve the vehicle performance and reduce the development period of vehicle using each module part for the high quality and performance of vehicles. However each component part doesn't generate the noise and vibration problems, sometime these problems are generated on the assembly status between vehicle chassis frame and each module part. On this study, in order to analysis the dynamic characteristics of a shield door module that is a typical module part of vehicles, the acquisition and evaluation process about the vibration and noise of shield door module is developed. Also the possibility to apply to shield door module of the developed process is verified by the comparison with the dynamic characteristics between plastic and steel module plate.

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손목힘 센서를 이용한 5축 로봇의 힘제어 (Force control of the five-link robot using wrist force sensor)

  • 허영태;이장명
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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    • pp.552-555
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    • 1996
  • In this paper, we present a force control of a five-axes robot, using an impedance model. Tasks such as assembly, grinding, and deburring, which involve extensive contact with the environment, are better handled by controlling the forces of interaction between the manipulator and the environment. The five-link articulated robot is equipped with a wrist force sensor which consists of an array of strain gauges and can delineate the three components of the vector force along the three axes of the sensor coordinate frame, and the three components of the torque about these axes. For the precise control of the contact force, impedance models of a robot and the environment are defined. Experimental results are shown.

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A Machine Vision System for Inspecting Tape-Feeder Operation

  • Cho Tai-Hoon
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • 제6권2호
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    • pp.95-99
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    • 2006
  • A tape feeder of a SMD(Surface Mount Device) mounter is a device that sequentially feeds electronic components on a tape reel to the pick-up system of the mounter. As components are getting much smaller, feeding accuracy of a feeder becomes one of the most important factors for successful component pick-up. Therefore, it is critical to keep the feeding accuracy to a specified level in the assembly and production of tape feeders. This paper describes a tape feeder inspection system that was developed to automatically measure and to inspect feeding accuracy using machine vision. It consists of a feeder base, an image acquisition system, and a personal computer. The image acquisition system is composed of CCD cameras with lens, LED illumination systems, and a frame grabber inside the PC. This system loads up to six feeders at a time and inspects them automatically and sequentially. The inspection software was implemented using Visual C++ on Windows with easily usable GUI. Using this system, we can automatically measure and inspect the quality of ail feeders in production process by analyzing the measurement results statistically.

병렬 처리 구조의 GPU를 이용한 의료 초음파 영상용 에코 신호 처리기 (An Echo Processor for Medical Ultrasound Imaging Using a GPU with Massively Parallel Processing Architecture)

  • 서신혁;손학렬;송태경
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2008년도 하계종합학술대회
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    • pp.871-872
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    • 2008
  • The method and results of the software implementation of a echo processor for medical ultrasound imaging using a GPU (NVIDIA G80) is presented. The echo signal processing functions are modified in a SIMD manner suitable for the GPU's massively parallel processing architecture so that the GPU's 128 ALUs are utilized nearly 100%. The preliminary result for a frame of image composed of 128 scan lines, each having 10240 16-bit samples, shows that the echo processor can be inplemented at a high rate of 30 frames per second when implemented in C, which is close to the optimized assembly codes running on the TI's TMS320C6416 DSP.

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디젤 발전기세트의 구조진동특성 연구 (Analysis and Prediction of Structural Vibration for Diesel Engine Generator Set)

  • 이수목;김관영;김원현
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2002년도 춘계학술대회논문집
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    • pp.948-954
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    • 2002
  • The structural vibration of a diesel generator set was investigated through analyses and tests. FE modeling and normal mode analysis were performed and compared with measured results for both structure components and generator set assembly. The results of component analyses were fairly well coincident with measured results but those of assembled generator set showed more or less discrepancies. Discussions were given about the uncertainties for vibration characteristics of component structures and assembled running structures especially concerning their nonlinearities and damping effects. Detailed excitation analysis fellowed by forced response analysis was done from the engine and pressure data to compare with the actual measured vibration. As results the vibration prediction for frame structures of reciprocating internal combustion engine was confirmed reliable to some extent.

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건설기계 조립 라인 투입 순서를 고려한 제관 공정 생산 스케줄링에 관한 연구 (A Study on the Body Welding Operation Scheduling Considering the Assembly Line's Input Sequence in Construction Equipment Manufacturing)

  • 김기동;최호식
    • 산업기술연구
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    • 제27권A호
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    • pp.69-76
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    • 2007
  • The body of an excavator, one sort of the construction equipment, consists of mainframe part, track frame part, boom part and arm part. The all parts are manufactured in the body welding operation. The scheduling in the body welding operation of a construction equipment manufacturing is to take all the various constraints into consideration. The offset time, due date, daily capacity of operations, daily jig's capacity, precedence relation, outsourcing, alternative resource and all of the shop floor environment should be considered. An APS(Advanced Planning & Scheduling) system is a proper and efficient system in such circumstance. In this paper, we present an APS system, the optimal scheduling system for the construction equipment manufacturing specifically for the body welding operation, using ILOG Solver/Scheduler. ILOG Solver/Scheduler is a general purposed commercial software which supports to find a feasible or optimal solution using object oriented technique and constraints satisfaction programming, given constraints and objectives.

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A Calibration of Kinematic Differences between the Robot Model in OLP and Actual SCARA Robot

  • Ahn, Cheol-Ki;Lee, Min-Cheol
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1998년도 제13차 학술회의논문집
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    • pp.111-116
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    • 1998
  • In this study, we try to coincide virtual robot system in an OLP(off-line programming) with actual robot system even though kinematic differences between them are made. The virtual robot in the OLP may be modeled according to kinematics of the actual robot system. However, it is a complicated problem to find exactly all kinematic parameters of actual robot and environment. In this paper, an automated calibration method is proposed In order to find some kinematical parameters which are necessary for the modeling of a robot and environment in the OLP. It is applicable to SCARA robot for assembly task. In this method, a well-marked worktable of environment Is regarded as reference coordinate frame. The robot detects some marks on the worktable through sensors attached to the end-effector. The necessary parameters are calculated from the data of the robot joint variables when the robot detects the mark. The model in the OLP is modified by the parameters.

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