• Title/Summary/Keyword: 정밀도 향상

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초정밀 연마기의 고성능 설계기술

  • 김태형
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.05a
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    • pp.41.4-41
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    • 2004
  • 본 발표에서는, 초정밀 연마기의 고성능화와 자동화를 위한 개념설계, 적절한 요소부품의 선택, 그리고 연마공정제어 및 형상오차보정 기술에 대해 설명한다. 초정밀 Polishing 공정이 기존의 개념과는 달리 표면품질의 개선 외에 형상정밀도의 유지 또는 향상 측면에서 기술적 접근이 요구되는 사실에 대해 초점을 맞추었다. 이제 초정밀 연마기는 Nano-meter 수준의 표면 품질과 동시에 형상정밀도 달성의 가능성을 열고 있다.

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Accuracy Improvement of Laser Navigation System using FIS and Reliability (FIS와 신뢰도를 이용한 레이저 내비게이션의 정밀도 향상)

  • Jung, Eun-Kook;Kim, Jung-Min;Jung, Kyung-Hoon;Kim, Sung-Shin
    • Journal of the Korean Institute of Intelligent Systems
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    • v.21 no.3
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    • pp.383-388
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    • 2011
  • This paper presents to study the accuracy improvement of the laser navigation using FIS(fuzzy inference system) and the reliability. As wireless guidance system, the top-mounted laser with the laser navigation can rotate $360^{\circ}$ with phototransistor or other optical sensors that read the return signal from reflectors mounted at the perimeter of the workspace. The type of major existing guidance systems is a wire guidance system. Because they have high accuracy and fast response time, they are used to most industries. However, their installation cost is very expensive and maintenance is very difficult because their sensors are placed approximately 1 inch below the ground or embedded in the floor. To solve those problems, the laser navigation was developed as a wire guidance system. It does not need to reconstruct a floor or ground. And it can reduce costs of installation and maintenance because changing the layout is easy. However, it is difficult to apply to an industrial field because it is easily affected by disturbances which cause loss and damage of data, and has slow respond time. Therefore, we study the accuracy improvement of the laser navigation. The proposed method is a correction method using reliability of the laser navigation. here, reliability is calculated by FIS which is designed with the analyzed characteristics of the laser navigation. For performance comparison, we use original position data form the laser navigation and position data corrected by original reliability from the laser navigation. In experimental result, we verified that the performance of the proposed method compared the others is improved by about 50% or more.