• 제목/요약/키워드: 면적 관성모멘트

검색결과 2건 처리시간 0.015초

추진제 그레인 설계 프로그램 개발 (Development of the propellant grain design program)

  • 이도형;양준서;오석진
    • 한국추진공학회:학술대회논문집
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    • 한국추진공학회 2007년도 제29회 추계학술대회논문집
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    • pp.207-210
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    • 2007
  • 본 논문은 상용 CAD 프로그램을 이용한 그레인 설계 자동화 프로그램 개발에 관하여 기술하였다. 이 프로그램 통하여 추진기관의 성능산출에 이용되는 연소거리에 따른 연소면적, 체적, 관성모멘트, 무게중심의 변화 및 그레인 형상정보를 쉽게 얻을 수 있었다.

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기계가공작업을 위한 강성이 큰 2단 평행구조 로보트 암 설계 (Design of a High Stiffness Machining Robot Arm with Double Parallel Mechanism)

  • 이민기
    • 대한기계학회논문집
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    • 제19권1호
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    • pp.22-37
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    • 1995
  • Industrial robot has played a central role in the production automation such as welding, assembling, and painting. There has been, however, little effort to the application of robots in machining work(grinding, cutting, milling, etc.) which is typical 3D work. The machining automation requires a high stiffness robot arm to reduce deformation and vibration. Conventional articulated robots have serially connecting links from the base to the gripper. So, they have very weak structure for he machining work. Stewart Platform is a typical parallel robotic mechanism with a very high stiffness but it has a small work space and a large installation space. This research proposes a new machining robot arm with a double parallel mechanism. It is composed of two platforms and a central axis. The central axis will connect the motions between the first and the second platforms. Therefore, the robot has a large range of work space as well as a high stiffness. This paper will introduce the machining work using the robot and design the proposed robot arm.