著者

国枝 正春 唐沢 昭雄 宇田川 和利 西村 誠一

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.47, no.414, pp.p164-170, 1981-02

被引用文献数

3

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地震による鉄道車両の転ぷくの力学的理論解析で、曲線通過時の遠心力、風圧力、走行中の振動慣性力の影響をも加えてある。まず、転ぷくに対する危険率Dを定義し、D=1が転ぷく限界であるとし、Dに及ぼす地震の大きさ、曲線半径、カント、走行速度、車両振動、横風の風速などの影響を算出する一般的な理論計算式を提出し、実車両による数値計算例をかかげた。各種車両の設計検討のために、実用に供することを目的としている。

著者

日比野 有 下村 隆行 谷藤 克也

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.75, no.758, pp.2605-2612, 2009

参考文献数

9

被引用文献数

2 6

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In order to verify the validity of "the Detailed Equation" which is a method of static analysis on railway vehicle overturning, we conducted a full scale experiment. The Detailed Equation is an equation of the equilibrium of the forces that act on a railway vehicle, which is similar to an equation for solving the overturning problem of a rigid body, but the external forces and the displacement of the car body are taken into account in detail. Strong crosswind is an important problem for securing the safety of railway vehicles. "The critical wind speed of overturning" or "The wheel unloading ratio" is one of the indices to evaluate the safety of railway vehicles under strong crosswind, and can be obtained by the Detailed Equation. Thus we need to verify the validity of the Detailed Equation. In the full scale experiment, we loaded lateral force (assumed to be crosswind) on the test vehicle, and examined the behavior of the vehicle, such as displacement of the car body and variation of wheel load. As a result, the Detailed Equation has been verified to be valid when we use it for evaluating the critical wind speed of overturning or the wheel unloading ratio.

著者

五十嵐 昭男 吉田 孝文 服部 健太郎

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.60, no.578, pp.p3372-3379, 1994-10

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Rolling motion is one cause of mechanical sound. Rolling sound may cause serious problems when it is excessive in machines and structures, for example. A series of studies have been carried out in order to obtain basic information for the reduction of rolling sound. This third report concerns the generation mechanism of the sound. Horizontal square steel plates with different surface finishes were simply supported at four points. Nylon and steel balls with different surface finishes were rolled at various rolling velocities on the plates, and the sound was measured using a condenser microphone. Surface topographies of the balls and plates were also measured by a device measuring the deviation from circular form and surface roughness, respectively. The signals obtained in the measurements were analyzed by an FFT analyzer. From the experiments, analysis and considerations, the generation mechanism of the sound was clarified.

著者

柳澤 秀吉 村上 存 大富 浩一 穂坂 倫佳

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.74, no.746, pp.2607-2616, 2008-10-25 (Released:2011-03-04)

参考文献数

13

被引用文献数

4 8

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This paper describes a new quantification method of a product's emotional quality, which we call kansei quality, with attention paid to its diversity to support the affective design. The customer's sensitivity towards such a quality differs from person to person due to perception gaps and ambiguity. The proposed method helps the designer to grasp such diverse sensitivities of customers. In contrast to the conventional approach that aims to generalize human sensitivity using average results of sensory tests, the proposed method divides an emotional quality based on differences among the customers' sensitivity. We apply the proposed method for designing a machine sound in which the designer deals with the sound quality as a kansei quality. We carry out an impression evaluation experiment on human subjects using existing product sounds. To demonstrate the effectiveness of the method, we compare the proposed method with the conventional approach using experimental results. The comparison results show the advantages of the method, such as the avoidance of meaningless average data caused by canceling out multiple different sensitivities. Based on the proposed method, we developed a prototype system that enables the designer to evaluate the kansei qualities of created sound without conducting a sensory test.

著者

栗田 裕 松村 雄一 神田 真一 絹笠 裕直

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.74, no.741, pp.1333-1339, 2008-05-25 (Released:2011-03-04)

参考文献数

6

被引用文献数

1

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Quadruped animals switch gait patterns with walking frequency for energy-effective walking. This is similar to the phenomenon that excited natural vibration modes are switched with vibration frequency in a MDOFs system. Therefore, in this paper, it is assumed that quadruped animals walk by using the natural vibration of their own musculoskeletal systems. In the simplest rigid-body-link model consisting of a body and four legs, there are the natural vibration modes similar to the gait patterns (trot, pace and gallop) of quadruped animals. However, all the natural frequencies in the model exist near the natural frequency in the free leg, and are accordingly different from the walking frequencies of actual quadruped animals. In the rigid-body-link model added a scapular and a pelvic on observations of quadrupted walking, the natural frequency of the gallop mode corresponding to high speed walking raises greatly and approaches the walking frequency. If the physical characteristics of horses were applied to the rigid-body-link model added the leg's joints, the natural vibration in the model is close to the gait patterns of horses.

著者

白土 寛和 野々村 美宗 前野 隆司

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.73, no.726, pp.541-546, 2007-02-25 (Released:2011-03-04)

参考文献数

15

被引用文献数

6 11 2

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Artificial skin having human skin-like texture is necessary for the development of tactile evaluation systems and for robots that have physical contact with humans. This paper describes a novel type of artificial skin having human skin-like texture and a model of human texture perception. The artificial skin is designed by emulating the surface shape pattern and elastic structure of the human skin. Appropriate wettability and friction property of the artificial skin is achieved by designing the surface shape. Through sensory evaluation, we confirm the artificial skin has human skin-like texture due to its surface shape pattern and elastic structure. In addition, we build a model of skin-like texture perception through multivariate analysis between physical parameters and tactile factor scores. This model can indicate what factor is important for human skin-like texture. From the results, artificial skin having optional skin-like texture can be developed

著者

中野 寛 末岡 淳男 劉 孝宏 家藤 英世 折居 利昭 中江 貴志

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.72, no.720, pp.2373-2381, 2006-08-25 (Released:2011-03-04)

参考文献数

8

被引用文献数

2 4

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This paper deals with the occurrence mechanism of the squeal phenomena generated in a new type of bicycle disk brake unit and its countermeasure experimentally and analytically. It was made clear that squeal was in-plane vibration in the direction of disk surface with frequency 650 Hz caused by frictional characteristics with negative slope with respect to the relative velocity, and was generated in the vibration system including brake unit and spokes, in the same manner of old type of disk brake unit. The countermeasure against squeal by using a dynamic absorber was conducted. The simple analytical model of the bicycle disk brake system was set up. Some features of squeal phenomena and the optimal design of dynamic absorber for quenching squeal were made clear analytically and it was confirmed that the analytical results agreed well with the experimental ones.

著者

藤田 喜久雄 赤木 新介 廣川 敬康

出版者

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.59, no.564, pp.2576-2583, 1993-08

著者

彭 志新 足立 紀彦

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.57, no.537, pp.p1625-1630, 1991-05

被引用文献数

2

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In this paper, the position and force control of constrafined motion of robotic manipulators is discussed. First, issues related to decoupling position and force-controlled directions are discussed. The fundamentals of estimation of the contact force without using force or torque sensors are then presented, and a control scheme for position and force control of robotic manipulators without using force sensors is proposed. The extension of this scheme to redundant manipulators is also discussed. Finally, the proposed control scheme is implemented on a 3-DOF planar redundant manipulator, and the experimental results illustrate the validity of the control scheme.

著者

辻岡 康

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.45, no.392, pp.p401-406, 1979-04

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本論文は,両側に張出しを持つはりと片側にのみ張出しを持つはりとの横振動特性を調べることを目的としており,2個の力の作用する両端自由はりと,1個の力の作用する一端支持,一端自由のはりとの運動方程式を解き,その解に支持点位置での条件を適用することによって振動数方程式を求め,振動数を計算し,振動数に与える張出し部の長さの影響を明らかにし,実験によってその結果をためした.