• Title/Summary/Keyword: 면적 관성모멘트

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

  • Lee, Do-Hyung;Yang, June-Seo;Oh, Seok-Jin
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2007.11a
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    • pp.207-210
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    • 2007
  • This paper describes the development of the grain design automation program using commercial CAD(computer-aided-design) software. This program allows to readily obtain output of burning area, volume, moments of inertial, motion of the center of gravity, and other geometric data as a function of regressed distance. These are utilized in performance analysis.

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

  • 이민기
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.19 no.1
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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.