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四位置導引機構解域分析及綜合方法

Solution region analysis and synthesis method of 4-position rigid-body guidance

  • 摘要: 對于給定的剛體四位置,在布爾梅斯特曲線上任取兩組位置點可得到無窮多個機構解,要求設計者快速準確地從中選取位置點綜合出滿足各項設計要求的最優機構是比較困難的.本文提出將無窮多機構解用有限機構解域來表示,通過機構解域初步分析繪出機構屬性圖,據此設計者可了解每個機構的類型、最小傳動角、桿長比以及有無缺陷等信息.其次施加約束條件構成可行機構解域,這樣可避免位置點選取的盲目性.最后基于可行機構解域或感興趣的區域繪制機構性能分析圖確定機構最優解.

     

    Abstract: A set of Burmester curves can present an infinite number of rigid-body guidance solutions for given four rigid-body poses. It is difficult for designers to synthesize the best linkage through rapidly and exactly select points that ensure to satisfy every design condition. First, an infinite number of rigid-body guidance solutions were expressed as finite solution regions in this paper. Based on initial analysis of solution regions, the mechanism property graph was computed to make designers find out the revolved mechanism's information, such as type, minimum transmission angle, link-length ratio, defects, and so on. Second, after the design constraints were considered and imposed, the feasible solution regions which avoid aimlessness in choosing positions can be calculated. Finally, on the feasible solution regions or the one of interest, property analysis graphs were displayed, along with which the optimized rigid-body guidance solution produces.

     

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