著者

藤井 健次 山本 歩

出版者

一般社団法人日本機械学会

雑誌

東海支部総会講演会講演論文集

巻号頁・発行日

vol.2001, no.50, pp.27-28, 2001-03-01

著者

小林 宏 橋本 卓弥 山崎 和広 平井 義和

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.76, no.764, pp.922-929, 2010-04-25

参考文献数

11

被引用文献数

1

---

There are many cosmetic companies and visual appreciation is undertaken by human expert though, skin texture has not been investigated quantitatively and automatically so far. In this study, image processing method for analyzing skin texture is proposed. Since sulci is very important for expressing skin texture, we apply cross binarization method for extracting sulci and by matching short lines onto sulci extracted, sulci is expressed by short lines. By analyzing short lines in terms of number, direction, and so on, quantitative indices are suggested for displaying feature of sulci. We then investigate whether it is available or not to predict visual appreciation score by quantitative indices. By using multiple linear regression analysis, we find that visual appreciation score is predictable in high rate by using quantitative indices we have proposed. This method comes into practical use since January 2009.

著者

相原 洋人 田中 信雄

出版者

一般社団法人日本機械学会

雑誌

Dynamics & Design Conference

巻号頁・発行日

vol.2007, pp."340-1"-"340-6", 2007-09-25

---

There have been a number of reports on active noise control (ANC). However, conventional ANC using a voice coil loudspeaker promises attenuation only at targeted local points. Then ANC using a parametric array loudspeaker as a control source is discussed. A parametric array loudspeaker exploits nonlinear interactions of finite amplitude ultrasounds in the air. Characteristics of a parametric array loudspeaker have already been reported by a number of researchers. However, there are few investigations of simulation or experimental result of ANC using a parametric array loudspeaker. This paper addresses control effect of feed forward ANC using a parametric speaker as a control source. The control effect is more than 20dB by ANC using a parametric array loudspeaker as a control source at 1000Hz. Distribution maps of sound pressure of ANC using a conventional speaker and a parametric speaker as a control source are shown by numerical analyses and experiments.

著者

森本 吉春 瀬口 靖幸 東 利彦

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 A編 (ISSN:03875008)

巻号頁・発行日

vol.54, no.504, pp.1546-1552, 1988

被引用文献数

5 10

---

By shifting the discrete Fourier spectrum of the image of a deformed grating, we can obtain "the complex moire pattern". Strain distribution is given as the derivative of the argument of the complex moire pattern. The analysis is completely automatized by introducing the digital image processing. All of the laborious and subjective procedures reguired in conventional analysis such as fringe sign determination, fringe ordering, and fringe interpolation are completely eliminated and objective, fast and accurate analysis can be made.

著者

Iwamoto Masami Miki Kazuo Yang King H.

出版者

一般社団法人日本機械学会

雑誌

JSME international journal. Series C, Mechanical systems, machine elements and manufacturing (ISSN:13447653)

巻号頁・発行日

vol.44, no.4, pp.1072-1081, 2001-12-15

参考文献数

32

被引用文献数

13

---

Previous studies in both fields of automotive safety and orthopedic surgery have hypothesized that immobilization of the shoulder caused by the shoulder injury could be related to multiple rib fractures, which are frequently life threatening. Therefore, for more effective occupant protection, it is important to understand the relationship between shoulder injury and multiple rib fractures in side impact. The purpose of this study is to develop a finite element model of the human shoulder in order to understand this relationship. The shoulder model included three bones (the humerus, scapula and clavicle) and major ligaments and muscles around the shoulder. The model also included approaches to represent bone fractures and joint dislocations. The relationships between shoulder injury and immobilization of the shoulder are discussed using model responses for lateral shoulder impact. It is also discussed how the injury can be related to multiple rib fractures.

著者

沖 巖

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集 (ISSN:00290270)

巻号頁・発行日

vol.11, no.41, pp.1-4, 1945

被引用文献数

1

著者

小島 清美 寺崎 健 三浦 英生 西村 朝雄

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. A編 = Transactions of the Japan Society of Mechanical Engineers. A (ISSN:03875008)

巻号頁・発行日

vol.69, no.686, pp.1409-1414, 2003-10-25

参考文献数

20

---

A practical structural design system for LSI packages has been developed based on object oriented and graphical user interface technologies. An object-oriented technology is applied for creating product model-based analytical model (PBAM) which is independent of analytical method or tool. It is easy to create any CAE model from the PBAM. Graphical user interface is another effective technology for easy operation. Design engineers only have to select a model of interest and revise the dimensions or materials of the package, if necessary. As soon as they finish revising the input data, a CAE model such as finite element meshes are generated and the analysis starts automatically. The life of the solder joints, for example, is automatically evaluated and the results are displayed on a CRT. This system is very effective for designing new, highly reliable LSI packages in a short time.

著者

西沢 博幸 大澤 正敬 大年 浩太 平手 洋 中村 俊秋

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.572, pp.p1323-1328, 1994-04

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PID (Proportional, Integral and Derivative) control is generally used in industrial products today, because of its simple algorithm and good adaptability on the scene. However, the matching of PID control parameters is difficult, thus we are looking forward to the development of auto-tuning of PID control parameters. In this study, we attempted fuzzy auto-tuning for a gasoline engine's electronic speed controller with PID control. Here fuzzy production rules are independently applied, and each rule is weighted by the degree of inputs of assumed parts. This fuzzy reasoning method is useful in simplifying the description of fuzzy production rules and provides a simple means of control similar to that performed by humans.

著者

宮本 岳史 石田 弘明 松尾 雅樹

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.64, no.626, pp.3928-3935, 1998-10-25

参考文献数

10

被引用文献数

4

---

We have developed the new simulation program which can deal with the large displacement, as the railway vehicle derails or overturns and wheels leave from rails. The dynamic behavior of railway vehicles running on track vibrated due to earthquake is analyzed, using this numerical simulation. The tentative running safety limits are proposed, that show the critical amplitude of track vibration at each frequency against the derailment. Moreover, the influence of vertical track vibration besides lateral one on the running safety limits is investigated. As a result, it is found that the vehicle running safety against earthquake has strong relation to the lateral track vibration, although the vertical vibration promotes the jumping of wheels. In the low frequency area, the rolling of carbody is excited gradually, and then the vehicle overturns, when it suffers the large amplitude seismic motion. In the high frequency area, the wheel flange comes into collision with rail at the first or second vibration, and the wheel jumps and leaves from rail. In respect of the critical track acceleration, railway vehicles have a tendency to be able to stand the earthquake with high frequency vibration more than 1.4 Hz.

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

渡邉 信

出版者

一般社団法人日本機械学会

雑誌

日本機械学會誌 = Journal of the Society of Mechanical Engineers (ISSN:00214728)

巻号頁・発行日

vol.113, no.1098, pp.342-345, 2010-05-05

参考文献数

5

著者

堤 一郎

出版者

一般社団法人日本機械学会

雑誌

日本機械学會誌 (ISSN:00214728)

巻号頁・発行日

vol.113, no.1097, pp.247-252, 2010-04-05

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

---

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

宇海 洋平 木村 哲也

出版者

一般社団法人日本機械学会

雑誌

講演論文集

巻号頁・発行日

vol.2007, no.44, pp.209-210, 2007-03-01

著者

鈴木 秀人 ? 偉民 永井 邦和 松山 健也 伊藤 吉保 柴田 良一

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. A編 (ISSN:03875008)

巻号頁・発行日

vol.61, no.585, pp.894-899, 1995-05-25

被引用文献数

20 5

---

An influence of cooling rate on the fatigue reliability of aluminum alloy castings (AC4CH) was investigated. The results obtained were as follows : (1) As the cooling rate of AC4CH was increased, the porosities and the microstructure were controlled fine. (2) The fatigue strength of AC4CH produced through rapid cooling rate was superior to that produced through slow cooling rate, specially on the fatigue limit (N=10^7). (3) The effect of stress gradient on the fatigue limit is due to the probability that the maximum stress can put on the largest porosity in the specimen. (4) Micro porous defects were always observed at the origin of fatigue crack. Then, it could be interpreted that the fatigue life was related to the size of porous defect, based on fracture mechanics. (5) From the above relation and the statistical analysis on the size of porous defect, the fatigue limit of 99% remaining probability could be estimated.

著者

中西 不二夫

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集 (ISSN:00290270)

巻号頁・発行日

vol.18, no.75, pp.44-46, 1952-11-25

---

The criterion for rupture of brittle materials like cast iron is σ=σ_B, where, σ is mean value of normal tensile stress on the surface of rupture ; the mean is generally a weighted mean, the effectiveness to the load being taken into account, and σ_B is ultimate tensile strength. The strength, when a rotating disk of brittle material bursts in a diametral section under centrifugal force, can be obtained from the same condition, σ being, in this case, the ordinary average value. For ductile materials the condition of strength may be put σ=σ_B', where, σ_B'is tensile strength under uniform stress, or in this case the strength of a rotating ring. The strength calculated from this condition was compared with experiments hitherto carried out.

著者

小林 明

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集 (ISSN:00290270)

巻号頁・発行日

vol.4, no.16, pp.240-243, 1938-08

著者

川田 正秋

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集 (ISSN:00290270)

巻号頁・発行日

vol.4, no.16, pp.227-230, 1938-08

著者

井伊谷 鋼一

出版者

一般社団法人日本機械学会

雑誌

日本機械学會誌 (ISSN:00214728)

巻号頁・発行日

vol.58, no.436, 1955-05-05

著者

兵頭 和幸 押村 健史 三上 貞芳 鈴木 昭二

出版者

一般社団法人日本機械学会

雑誌

ロボティクス・メカトロニクス講演会講演概要集

巻号頁・発行日

vol.2009, pp."2P1-C15(1)"-"2P1-C15(4)", 2009-05-25

被引用文献数

1

---

This paper verified the stability of the passive dynamic biped walk by not only indoor but also outdoor environments using a foot shape design to enhance stability. In outdoor environments, since the change of loose slope, small bumpy surface and the frictional force on a road surface are not constant, it is a difficult environment for realizing a walking. We propose about the walk stabilized comparatively in outdoor environment by control constraint mechanism.