• Title/Summary/Keyword: 초정밀

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Measurement of Geometric Errors of an Ultra Precision mMT Using PSDs (PSD를 이용한 초정밀소형공작기계의 기하학적 오차 측정)

  • Kwon, Seol-Ryung;Kweon, Sung-Hwan;Yang, Seung-Han
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.35 no.1
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    • pp.53-58
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    • 2011

  • Ultra-precision miniaturized machine tools essential for manufacturing accurate machine components in micro/meso-scale have been developed. To realize high accuracy using mMTs, geometric errors, which are considered as the main sources of inaccuracy should be identified and compensated. The conventional systems for measuring geometric errors, such as a laser interferometer, can measure only one geometric error in a single setup and they involve complicated measurement procedures. A measurement system using PSDs is a promising alternative but the measurable range of such systems is limited to the active range of the PSDs. The proposed measurement system using PSDs can overcome the limit of small measurable range. Further, the mounting errors that could occur during set-up process can be avoided. In this paper, an algorithm corresponding to the system was analyzed and experiments were carried out.

  • https://doi.org/10.3795/KSME-A.2011.35.1.053 인용 PDF KSCI

Design of 6 DOF Mechanism with Flexure Joints for telecommunication mirror and Experimental Stiffness Modeling (탄성힌지를 이용한 초정밀 통신용 미러 구동 6축 메커니즘 구현과 실험적 강성 모델링)

  • Kang, Byoung Hun
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.19 no.6
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    • pp.169-174
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    • 2019

  • Flexure joints are recently used in the ultra-precision mechanism for a telecommunication mirror stage. Flexure joints have several advantages coming from their monolithic characteristics. They can be used to reduce the size of manipulators or to increase the precision of motion. In our research, 6 dof(degree of freedom) mechanism is suggested for micrometer repeatability using a flexure mechanism. To design the 6-dof motion, the 2-dof planar mechanism are designed and assembled to make the 6-dof motion. To achieve a certain performance, it is necessary to define the performance of mechanism that quantifies the characteristics of flexure joints. This paper addresses the analysis and design of the 6-dof parallel manipulator with a flexure joint using a finite element analysis tool. To obtain experimental result, CCD laser displacement sensor is used for the total displacement and the stiffness for the 6-dof flexure mechanism.

  • https://doi.org/10.7236/JIIBC.2019.19.6.169 인용 PDF KSCI HTML

Ultra-High-Precision Network Technology Trend for Ultra-Immersive/High-Precision Service (초실감/고정밀 서비스를 위한 초정밀 네트워크 기술 동향)

  • Choi, Y.I.;Kim, E.H.;Kang, T.K.;Kim, D.Y.;Kim, J.Y.;Cheung, T.S.
    • Electronics and Telecommunications Trends
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    • v.36 no.4
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    • pp.34-47
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    • 2021

  • To realize remote surgery from hundreds of kilometers away, a new communication environment with ultra-low latency and high-precision features is required. Thus, ultra-high precision networking technology that guarantees the maximum latency and jitter of end-to-end traffic on an Internet-scale wide area network is in development as part of 6G network research. This paper describes the current status of various networking technologies in ITU-T, ETSI, IEEE, and IETF to ensure ultra-low latency and high precision in wired networks.

  • https://doi.org/10.22648/ETRI.2021.J.360404 인용 PDF