著者

黎 子椰 久保 敬司 川村 貞夫

出版者

The Society of Instrument and Control Engineers

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.38, no.11, pp.915-921, 2002-11-30 (Released:2009-03-27)

参考文献数

9

被引用文献数

1 1

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This study aims at clarifying the effects of internal force between human arms and a bicycle handle on the rotational stiffness of the bicycle handle. Rotational stiffness of the handle is determined by internal force stiffness and stiffness of human arms and body. We use the three-link model to analyze the rotational stiffness due to the internal force, and measure the rotational stiffness on level roads and slopes as a function of the internal force, Through theoretical calculation and experimental results, it is reveraled that the stiffness due to internal force is significantly large in comparison with the stiffness due to the muscle conrraction of arms and body. Moreover, the effective way to generate rotational stiffness of a bicycle handle by using internal force is proposed in this paper.

著者

丘 華 久保 明雄 林 長軍 黎 子椰

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.70, no.690, pp.531-538, 2004-02-25 (Released:2011-03-04)

参考文献数

6

被引用文献数

1 1

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In NC machining of noncircular contours, where cutter is fed along a straight line intersecting perpendicularly the roration axis of work piece, the cutter path usually consists of Archimedes's spiral segments. From machining precision and efficiency point of view, a desired cutter path should be composed of the fewer segments as possible under the condition of satisfying the specified interpolation error limitation. In this paper, an optimal interpolation principle of Archimedes's spiral for planar curves is presented and then a practical algorithm is constructed. The segment number of the cutter path resulted from the algorithm not only is the fewest but also the interpolation accuracy agrees with the specified value. It is also evidenced that the profile error of machined contour corresponding to the cutter path is perfectly controlled within the desired value, i. e. the specified interpolation error value, through detailed analyses. The interpolation results of using the presented algorithm for machining disc cam profile are compared with those obtained by Nishioka's methods (3) . The comparison results sufficiently confirm the validity of the algorithm developed by the authors.