• Title/Summary/Keyword: Stephenson Mechanism

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A study on Structure Design of Speed increaser Mechanism for Wave-Force Generator (파력발전기용 증속 기구의 구조 설계에 관한 연구)

  • 황정건;김봉주;신중호;권순만
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.1266-1269
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    • 2004
  • With increasingly wide needs for a new energy source, many operation types of a wave-forced generation have been studied. To obtain an economically avaliable energy, it is imperative that the speed of the in put wave should be increased by a proper mechanism. In this study, we propose a new speed-increaser mechanism for the wave-force generation using a well-known Stephenson mechanism. In this paper, we have analysed kinematically the proposed speed-increasing mechanism. then a computer program based on the C++ language is developed to prove the validity of our mechanism and to simulate a wave-forced generation.

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Computer aided design of six-revolute-pair mechanism and its torque analysis (콤퓨터에 의한 륙절기구의 설계와 토오크 해석)

  • 배순홍;정순길
    • Journal of the KSME
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    • v.16 no.2
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    • pp.77-83
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    • 1976
  • A computer aided design of a Stephenson type of Chained six-link mechanism with synthesis equations of the precision positions technigue to generate a required point path is presented. Analysis of this mechanism is carried out by the matrix method. The torque on the input link required to operate the mechanism was obtained by considering inertia and gravity forces of the coupler link.

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Optimum Design of Six-Bar Function Generators with Prescribed Functions Defined for the Entire Motion Range (전체 운동가능구간에 걸쳐 함수가 정의된 6절 함수발생장치의 최적설계)

  • Lee, Sang-Choon;Shin, Jae-Gyun
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.26 no.12
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    • pp.2527-2534
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    • 2002
  • An efficient method is proposed for the design of six-bar function generators with complex design tasks. Especially, the desired functions are defined for the entire motion ranges of the input variables. The design problem is defined as a nonlinear optimization problem. A concept of a weighted structural error is introduced for the definition of the objective function. Also simple branch identifiers are incorporated to eliminate the branch problems commonly encountered in a typical linkage synthesis problem. Two example problems of designing a Watt-II type double dwell mechanism and a Stephenson-III type double beat-up mechanism are demonstrated with numerical results. Constraints such as on the Grashof conditions and on the transmission angles are included for practical solutions.

Illustrative Mechanism and Fantastic Organism in Postmodern American Science Fiction

  • Kim, Il-Gu
    • English Language & Literature Teaching
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    • v.11 no.3
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    • pp.25-38
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    • 2005
  • Postmodern American science fiction authors often dramatize the human fear and hope for the newly emerging artificial life forms. For example, Helen as an advanced artificial intelligence Richard Power's Galatea 2.2 shows that the student's memorizing efforts for exams can be useless someday. In Neal Stephenson's Snow Crash machines are liable to be infected with viruses like human bodies. In He, She and It, Piercy's parallel of an artificial human (Yod) and a mythic personification (Golem) allegorically reveals the pandora-like unpredictable effect of advanced technology. More than the mechanical entities (the diffusion and linear models for Latour), these biologically artificial entities reveal the limitations of even the fantastically idealized technology simply because the human being as the creators or impersonators of these machines are not perfect. Compared to illustrative mechanism, biologically artificial entities (Latour's transition or whirlwind models) are inherently rebellious because of their closeness to the creators. The Butler's organic environmental interaction of the Earthseed convincingly demonstrates how the wrong use of science ruins the holy earth and also how human beings survive through the right use of effective science with the aid of anthroposophy.

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