著者

江口 隆夫 後藤 禎 古賀 毅 青山 和浩

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.771, pp.2772-2781, 2010-11-25

被引用文献数

2

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This paper proposes a method of impact analysis of the design change from the initial design stage. In author's previous work, a hierarchical requirement model is proposed in order to define the requirement of the complex mechatronics product. The product requirement is decomposed into three aspects: mechanical, electrical, and software. A hierarchical functional structure is proposed to represent the functional component in each design layer. The states and actions is designed as an activity diagram, and decomposed into the activity diagram in the next design stage. A constraint diagram is proposed to assign behavior elements and technical specifications. A decomposition process of the states, actions, and values is visualized using dependency structure matrix. The design change propagation analysis is proposed based on matrix between components, object flows, states, actions, and values. The proposed method is developed as a proto-type system based on SysML specifications and using Rhapsody. An intelligent crane system is designed as an example. A design change of the required behavior and actions is tested. The design result indicated that the proposed method surely can provide an affected components, parameters, and technical specifications with the change of requirement behavior.

著者

斉藤 俊 千葉 洋三

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.64, no.623, pp.2389-2394, 1998-07-25

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Two kinds of road racer bicycles are employed to research vibration characteristics of driving bicycles. After obtaing the natural frequencies and modes by vibration test in the non-driving state, practical driving tests are carried out. The acceleration of vibration in the middle of the handles and under the saddles are measured and the corresponding spectral density functions are calculated based on FFT method. The results show that in the driving bicycles, the dominant frequencies exist between 10 Hz and 50 Hz and the lower two modes in the non-driving state are excited.

著者

渡辺 克巳

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.45, no.389, pp.83-89, 1979-01-25

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本報告は球面運動において有限に離れた5位置が指定されたときに定まるプルメスタ点の座標の計算法を簡明な形で確立するため,最初に自由度2の2節リンク機構のパラメータと第2番めの節上に固定された円弧の位置決定変数の間の関係式を導出している.次にこの式を基礎式として計算法を確立するときにはプルメスタ点の座標が線形5元連立方程式および六次方程式を解いて決定できることを解明している.

著者

村木 正芳 木村 好次

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.55, no.520, pp.3048-3055, 1989-12-25

被引用文献数

1

---

Analysis is present of EHL traction with low-viscosity lubricating oils, which is the case encountered at higher temperatures. Extension is made of the approximate formula already derived by the authors, where it is assumed that viscosity, instead of viscoelasticity, predominates when the limiting Newtonian viscosity in an EHL film falls below a critical value, 10^5 Pas, and an Eyring viscous solution is employed. The rheological parameters representing the traction characteristics of an oil then become the effective viscosity-pressure coefficient and the representative stress, and they are expressed as functions of mean Hertzian pressure and bulk temperature. Calculated results are compared with experimental data obtained on a four-roller machine for two diesters showing close agreement.

著者

潤賀 健一 小倉 彰 長田 実 永瀬 和彦

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.56, no.530, pp.2825-2830, 1990-10-25

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Much difficulty has been encountered in cooperative traction of electric railcars and diesel railcars, because the structure and performance of the respective control systems are very different. Diesel railcars are characterized by more or less constant output from the initial to middle speed range and constant torque beyond the middle speed range. Electric railcars are characterized by virtually constant torque from the initial to middle speed range, with the output decided by notch order beyond the middle speed range. The authors propose a new control system for cooperative traction based upon an entirely new conception. This system changes a general notch order into a suitable notch order for the diesel railcar depending on the electric railcar's speed. The system was mounted on JR's electric and diesel railcars and tested on the main line of JR KYUSYU. Based on this test result, introduction of the system in commercial service was decided upon and practical operation began on April 29, 1989.

著者

佐口 太一 吉田 和夫 高橋 正樹

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.73, no.731, pp.2036-2041, 2007-07-25

被引用文献数

2 2

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Bicycle is the unstable system in itself. Although there are two methods of steering a handle and moving a weight in order to make a bicycle stable, it is shown that the former is more effective than the latter. This study deals with modeling and stabilizing control problems of a two-wheel bicycle. In the modeling, wheels side slip is taken into consideration. In the control, an optimal feedback control for stable running control is obtained. An autonomous bicycle robot is further developed. As a result of experiment, it is shown that the bicycle robot is able to run straight and turn stably. The effectiveness of the two-wheel bicycle model and control law are demonstrated.

著者

吉川 恒夫 鄭 心知 森口 知規

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.60, no.578, pp.3335-3342, 1994-10-25

被引用文献数

3

---

A system for displaying feel information while manipulating dynamic virtual objects is presented. A unified description of the dynamics of virtual objects based on the Lagrangian formulation is derived. The detection of the grasp states and the friction effects at the grasp points on a virtual object surface, which are important to help us recognize the object and handle it more dexterously, are treated explicitly. Display algorithms which create and present the dynamic operating feel of an object as well as the fricton feel on the object surface to the operator are proposed. Experimental verification of the proposed approches is performed and the results are outlined.

著者

小田 哲 矢野 満 五家 政人 小出 隆夫

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. C編 (ISSN:03875024)

巻号頁・発行日

vol.56, no.532, pp.3416-3419, 1990-12-25

被引用文献数

4

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This paper presents a study on the bending fatigue strength of austempered ductile iron (ADI) gears. The bending fatigue tests for ADI, S 45 C, FCD 80, and SCr 420 case-hardened gears were carried out, and the bending fatigue limit loads of ADI gears were compared with those of other gears. The bending fatigue limit loads of the ADI gears used were found to be almost equal to those of case-hardened gears. Furthermore, shot peening was performed on ADI gears, and the effect of shot penning on the bending fatigue limit loads of ADI gears was investigated by carrying out the bending fatigue tests. The bending fatigue limit loads of ADI gears can be raised considerably by shot peening.

著者

東森 充 内海 圭祐 大本 康隆 金子 真

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.74, no.743, pp.1825-1833, 2008-07-25

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This paper discusses a dynamic manipulation of an object on a plate attached at the tip of manipulator, where the basic concept is inspired by a handling mechanism of pizza master. Both the position and the orientation of object are dynamically controlled by the plate. The main driving force for manipulating the object is produced by the combination of inertial and frictional forces generated by one rotational and one translational motion of the plate. We first discuss how to make motions of object for three degrees of freedom on the plate. We then show that it is guaranteed to achieve an arbitrary set of desired position and orientation of object by the proposed manipulation scheme. Finally, we show a couple of experiments for confirming the basic idea by using a high-speed manipulator with an assistance of vision.

著者

土井 久代 西尾 壮平 後安 慧 宮本 岳史 上田 洋

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.770, pp.2440-2446, 2010-10-25

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It is very important to secure running safety of railway vehicles even when vehicles get derailed. In 2004, a Shinkansen train was derailed by a huge earthquake and its derailed wheels ran on concrete slabs. Taking account of this kind of accidents, a number of vehicle-guidance devices have been developed. Some of these devices are designed so as to lead derailed wheels onto a runway made of concrete slabs. In order to simulate the derailed cars running behavior on a runway of concrete slabs, it is necessary to make clear creep force characteristics and friction coefficients between wheels and concrete slabs, which are essential elements in determining vehicle dynamics. However, there is scarcely a study of rolling contact between steel wheels and concrete slabs; therefore the authors have executed an experimental investigation to evaluate creep force characteristics and friction coefficients between a steel testing wheel and a concrete slab.

著者

武田 行生 舟橋 宏明 村松 伸幸

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.62, no.599, pp.2920-2926, 1996-07-25

被引用文献数

2

---

This paper proposes an architecture of a planar in-parallel actuated manipulator with three degrees of freedom which is composed of the positional mechanism and the orientational chain. Kinematic synthesis is carried out to maximize the practically dextrous working space (PD working space) in which motion transmissibility is excellent and any orientatinon angle of the output link can be obtained. The size of working space and range of output orientation of the synthesized mechanism are compared to those of the mechanisms in the literature, and the results show that the synthesized mechanism has a large PD working space.

著者

矢沢 信八 北郷 薫

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.53, no.496, pp.2645-2654, 1987-12-25

被引用文献数

1

---

The loosening of a bolt-nut connection induced by a tangential load applied to a clamped plate is investigated theoretically and experimentally. The results obtained are as follows : 1. A driving torsional torque is induced on the bearing surface of the bolt head by slip of the bolt head on the fixed plate. 2. The above torsional torque is either in the tightening or loosening direction of the bolt according to the distribution of loads on the bearing surface of the bolt head. 3. If the resisting frictional torque on the screw thread part of the bolt in the mating nut is overcome by the above torsional torque, rotation of the bolt is caused in the nut which remains fixed on the clamped plate. The rotation of the bolt is either in the tightening or loosening direction depending on the direction of the above torsional torque. If the total sum of loosening rotation is greater than that of tightening, then the result is the loosening of the bolt. 4. The above torsional torque and the resisting frictional torque are much smaller than those expected from the coefficient of sliding friction.

著者

村上 岩範 後藤 桂孝 吉澤 明訓 安藤 嘉則 山田 功

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.765, pp.1093-1099, 2010-05-25

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In this research, we propose the driving method of the magnetic material disc by the rotating magnetic field. When the rotating magnetic field is given to the magnetic material disk, the magnetic material disk is magnetized by a phase different from the rotating magnetic field. Therefore, magnetic attractive force acts between the magnetic material disk and the rotating magnetic field. At this time, because force in the vertical direction and radial direction cancelled respectively, only force in the circumferential direction comes to act. The rotating torque is generated by this force in the circumferential direction. Therefore, the magnetic material disc rotates. The purpose of a present article is to clarify the proposed driving principle by doing the magnetic flux density measurement, torque measurement and the torque analysis. Then, this driving principle was clarified to some degree.

著者

河合 望 森 敏彦 丸茂 康男 千賀 雅明

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. C編 (ISSN:03875024)

巻号頁・発行日

vol.52, no.484, pp.3317-3323, 1986-12-25

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For improving the deep-drawability of sheet metal, it is necessary to possibly heighten the fracture force of the metal on the punch shoulder. In the square shell deep-drawing, it is vital to uniformize the stress distribution along a circumferential direction at the punch shoulder, as mentioned in the previous papers. In this paper, to clarify the conditions of uniformizing the stress distribution, various lubricants are applied to the punch head, using the punches with various corner radii. In the case of the smaller corner radii, the better lubricants improve markedly the drawabiity ; but in the case of the cylindrical punch, the inferior lubricants do so only slightly. The mechanisms are explained through the measurement of metal flow and thickness strain on the punch head.

著者

安部 原也 菊地 一範 岩城 亮 藤井 健

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.767, pp.1662-1668, 2010-07-25

被引用文献数

2

---

In order to investigate effects of driving conditions and traffic environments on visual behaviour, a driving simulator experiment was conducted. Specifically it was considered how a visual field was influenced as a function of cognitive distraction, possibly resulting in a situation of look-but-did-not see, and crowdedness of other vehicles and pedestrians. Cognitive distraction was simulated by a experimental secondary task which was relevant to mental calculations. It was found that driver's reaction time to a target mark was increased resulting from cognitive distraction. This result may be explained from a driver's visual field point of view. That is a visual field for recognising a target mark got small when drivers was distracted with particularly driving on non-crowded road, compared with crowded road. Potential application of this research will be discussed.

著者

橋本 良夫 斉藤 敏克

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.69, no.687, pp.3029-3033, 2003-11-25

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A method is proposed to analyze dynamic response of a rocket-launcher system at lift-off. In this paper, rocket-launcher system is modeled as finite element Bernoulli-Euler beams connected with two slippers which are modeled as linear springs. A beam element with a moving spring is devised to represent the rocket-launcher interaction. Coupled equations of motion with time-varying coefficients are derived and solved by using direct method such as the Wilson θ method to calculate the dynamic response of the system. To verify the validity of this method, dynamic response is calculated by using the data of M-3S rocket-launcher system. Two rocket models, rigid-body and elastic-body models, are used in this calculation. The numerical results obtained from two models are compared and discussed.

著者

塚本 尚久

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.50, no.459, pp.2156-2164, 1984-11-25

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無潤滑運転における防せい(錆)の意味で炭素鋼歯車の代用にステンレス歯車、黄銅歯車、鋳鉄歯車の使用を考えたがこれらの歯車とのかみ合いでナイロン歯車が使用された実績が少ないためその磨耗などの実態がわかっていない。このことから本報では上記3種類の金属歯車でナイロン歯車の磨耗実験を行いこれらの結果とすでに報告した炭素鋼歯車とかみ合うナイロン歯車の磨耗などを比較検討し相手金属歯車の材料の違いに伴うナイロン歯車の磨耗などを明らかにした。

著者

藤田 隆史 井上 昭彦 服部 忍 柴田 碧

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.50, no.456, pp.1327-1338, 1984-08-25

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誘導円板形継電器は送配電系統や発電機などの保護継電器として広範囲に使用されているが、過去の地震での誤動作も報告されており、その誤動作が従来から問題とされていた。本研究では、水平二次元加振により円板の中心軸下端のピボットが下部軸受内をふれまわる際の摩擦が原因となって円板が回転し、誤動作を起こすことを加振実験と理論解析により解明し、このタイプの継電器の振動試験は水平二次元加振によるべきことを明らかにした。

著者

斑目 春樹

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.47, no.413, pp.10-19, 1981-01-01

被引用文献数

1

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振動燃焼とも関係深い熱による気柱の振動について解析と実験を行ない、振動の生じやすさを発熱量や熱源位置、気流速度、振動数、熱拡散率などの関数として表した。解析モデルは非常に単純化したものであるが、実験結果はヒータ周囲の境界層の影響を係数として処理すればこれとよく合った。実験では振動発生域、成長速度、定常振幅、高次振動の発生などを調べ、大振幅では乱流遷移を生じ成長速度が変化する現象などを見い出し、考察を加えた。

著者

福田 敏男 下中 賢

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.54, no.504, pp.1812-1820, 1988-08-25

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This paper deals with the coordination force distribution at finger joints for an articulated hand, under the assumption that the articulated hand with multiple degrees of freedom and a multiple articulated joint structure grasps some objects. In this study, four algorithms for this force distribution problem in grasping some object are derived from the static equilibrium conditions. Furthermore, a method for changing contact and non-contact fingers in grasping is derived and some simulations are shown, where changing fingers implies that some non-contacting fingers begin to make contact with the object, while the other contacting fingers do not contact it, keeping the stable grasping conditions by hand as a whole. Finally, based on the proposed five control algorithms, a control flow of stable grasping methods for the force distribution at each joint is made for an overall control of the finger system by determining grasping forces to changing grasping fingers.