著者

西村 顕 北川 諭 柿田 将信 廣田 真史

出版者

一般社団法人 日本機械学会

雑誌

年次大会

巻号頁・発行日

vol.2015, pp._J0530302--_J0530302-, 2015

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The aim of this study is to design and propose the building model integrated with solar panel and wind turbine for the purpose of realizing the smart city. The number and angle of tilt of solar panel installed on the roof of the building are investigated considering the effect of shadow for some cities in Japan. The power generation characteristics of solar panel installed on not only the roof but also the wall of the building are also investigated assuming the building model to be installed in Tsu city. In addition, the power generation performances of the photovoltaic as well as the combined power generation of photovoltaic and wind turbine which are integrated with the buildings are compared with the power demand of the buildings. To estimate the power generation characteristics of the proposed model, the statistical meteorological data base is used. As a result, the optimum angle of tilt is 0 degree irrespective of investigated cities since the number of solar panel is the largest. Though the power energy generated by solar panel installed on the roof covers the most part of energy demand of the building, the addition of solar panel installed on the wall is effective to cover the energy demand through the year. The combined power generation of photovoltaic and wind turbine is effective when these power generation systems perform complementing the weakness of each system, e.g., the wind turbine covers the energy demand in night.

著者

西村 顕 柿田 将信 北川 諭 村田 淳介 安藤 俊剛 鎌田 泰成 廣田 真史

出版者

一般社団法人 日本機械学会

雑誌

年次大会

巻号頁・発行日

vol.2015, pp._J0530301--_J0530301-, 2015

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The aim of this study is to design and propose the size and layout of buildings which provide the better wind speed distribution for the higher power generation of wind turbine. A building model whose layout is like nozzle is proposed to obtain the acceleration of wind blowing through buildings due to contracted flow between buildings. In addition, the effect of the angle between two buildings on the power generation performance of the proposed building model is also investigated. For the feasibility check of installing the building model in some cities actually, the power energy output of wind turbine is investigated by considering the meteorological data such as wind speed and direction distribution for Fukushima city and Tsu city as an example. As a result, the proposed building models which have the angle between two buildings like nozzle of 90, 135 and 180 degree can provide the wind acceleration at the back of buildings for the wind blowing from the main wind direction and the angle of 135 degree is found to be the optimum building layout. In the case of installing the proposed building model in Fukushima city and Tsu city, the wind power energy output in winter is higher while that in summer is lower irrespective of the buildings angle. The interaction between the change in frequency distribution of wind speed direction through the year and the location of open tip of building model decides the power generation characteristics of the proposed building model.

著者

尾本 彰

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会誌 (ISSN:00214728)

巻号頁・発行日

vol.104, no.989, pp.204-208, 2001

参考文献数

14

著者

尾本 彰

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会誌 (ISSN:00214728)

巻号頁・発行日

vol.98, no.922, pp.750-752, 1995

参考文献数

10

著者

鈴木 達治郎 中岡 章

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会関東支部総会講演会講演論文集

巻号頁・発行日

vol.2004, pp.31-32, 2004

著者

大澤 潤 中野 冠

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 (ISSN:21879761)

巻号頁・発行日

pp.14-00071, (Released:2015-01-28)

参考文献数

27

被引用文献数

1

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Popularity of clean energy vehicles (CEVs) are expected in order to reduce CO2 emissions to mitigate the global warming. However, the popularity provides not only environmental but also economic impacts. An EV requires a battery, but does not require the engine parts any more, which will bring a structural change of the auto parts industry. It is necessary to understand the characteristics of parts used in each CEV type and analyze the economic effects before considering the portfolio for introducing CEVs. In this study, CEV types which have a battery or a fuel cell based powertrain system are considered as well as gasoline, diesel or natural gas engines. This paper proposes an economic ripple effect model using the Input-Output Table. Simulation results show economic impacts in Japan in 2020 and 2030 for the target sales of CEVs assumed by the Ministry of the Environment in 2010. For example, simulation results indicates that production amount in Japan in 2030 is expected to decrease about 1.5 trillion yen compared to 2010.

著者

大西 順也 陳 〓 大橋 弘忠

出版者

一般社団法人 日本機械学会

雑誌

計算力学講演会講演論文集

巻号頁・発行日

vol.2004, pp.395-396, 2004

著者

齊藤 飛翔 笹川 和彦 森脇 健司 藤崎 和弘

出版者

一般社団法人 日本機械学会

雑誌

M&M材料力学カンファレンス

巻号頁・発行日

vol.2018, 2018

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<p>Catheter insertion is a sensitive operation largely depending on tactile senses of the doctor. Although several kinds of force measurement systems attached in the catheter have been proposed, the measurement of the force during operation should be measured at the finger for evaluation of the tactile senses. In this study, we developed a film type tri-axial stress sensor that can be attached to the fingertip. An electro-conductive polymer in polythiophene series was used for the pressure sensitive layer. The conductive polymer material has a characteristic that the electric resistance in the thickness direction decreases under the compression. This type sensor is thin and flexible therefore it can be expected to directly measure the contact stress at the fingertip. In this experiment, the contact stress is measured under during catheter guide wire insertion motion. The contact stress vector including vertical and the plane directional components were detected at the gripping area of the wire. The motion trajectory of the finger in the catheter insertion was analyzed in a motion capture system. As a result, changes of the contact stress according to forward, backward, and rotation in the catheter operations were observed during insertion tests. It is possible to evaluate the catheter operation by means of the tactile sensing. Also, this measurement system can be applied not only to evaluate the skill of catheter operation but also to use for training the operation.</p>

著者

岡内 優明 前田 寛 島田 義生

出版者

一般社団法人 日本機械学会

雑誌

ジョイント・シンポジウム講演論文集:スポーツ工学シンポジウム:シンポジウム:ヒューマン・ダイナミックス 2000 (ISSN:24331309)

巻号頁・発行日

pp.209-212, 2000-11-08 (Released:2017-08-01)

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The purpose of this study was to obtain basic data for teaching ball handling in overhead passing in volleyball. The method used was simulation of a mass-elasticity-viscosity model consisting of hands and ball. First, we calculated the acceleration of the ball during contact with the hands through VTR images. As a result of comparing this acceleration with that of the simulation of the model, we found that the coefficients of elasticity and viscosity were adequate. The coefficients show that a skilled player absorbs the shock of the ball by finger elasticity soft in both trials, then accelerates the ball with wrist elasticity by changing stiffness depending on the height of set up. This is the reason skilled players can control the ball accurately. On the other hand, an unskilled player changes finger elasticity depending on the height of set up, and accelerates the ball by making wrist elasticity stiff, which results in less ball control.

著者

鈴木 浩平

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会誌 (ISSN:24242675)

巻号頁・発行日

vol.101, no.960, pp.803-805, 1998-11-05 (Released:2017-06-21)

著者

劉 本柱 三上 真人 小嶋 直哉

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B編 (ISSN:03875016)

巻号頁・発行日

vol.62, no.600, pp.3220-3226, 1996

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The flow induced noise from an expansion cavity-type muffler increases abruptly for some sizes of mufflers and flow velocities. This phenomenon is strongly related to the resonance of the tail pipe and the cavity of the muffler ; therefore, it is called the predominance of resonance&Prime;When the cavity length is increased, the measured resonance frequency shows periodic jumps. The cause of the predominance of resonance is assumed to be the generation of vortex rings with a particular frequency in the cavity. The generation of vortex rings is verified by analyzing fluctuating velocities in the cavity when the predominance of resonance occurs. The phenomenon is induced not only by the tail pipe resonance, but also by the cavity resonance. It is suggested that there exists the feedback phenomenon from the sound to the flow and it is strongly related to the sound pressure level in the cavity.

著者

相本 幸宏 池田 光優 三上 真人 小嶋 直哉

出版者

一般社団法人 日本機械学会

雑誌

中国四国支部総会・講演会 講演論文集

巻号頁・発行日

vol.2002, pp.107-108, 2002

著者

池田 光優 三上 真人 小嶋 直哉

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B編 (ISSN:03875016)

巻号頁・発行日

vol.64, no.625, pp.3126-3132, 1998

被引用文献数

1

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Attempts have been made to improve exhaust gas characteristics of the direct injection diesel engine under dual-fuel operation with gas oil and LPG. In dual-fuel operation with LPG as a sub-fuel, two kinds of LPG mixing methods can be employed. One is LPG mixing in gaseous state with the intake air, which is so-called "fumigation". The other is LPG mixing in liquid state with gas oil prior to injection. The experimental results show that the mixing method in liquid state is better than the fumigation method in terms of NO and THC emission and specific energy consumption. In the mixing method in liquid state, NO is reduced in comparison with the base engine without the increase in THC, smoke and specific energy consumption if a proper squish intensity is employed.

著者

倉橋 吉則 三上 真人 小嶋 直哉

出版者

一般社団法人 日本機械学会

雑誌

中国四国支部総会・講演会 講演論文集

巻号頁・発行日

vol.5, pp.109-110, 2000

著者

三上 真人 嶺山 隆志 伊藤 勝幸 河野 通方

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B編 (ISSN:03875016)

巻号頁・発行日

vol.62, no.600, pp.3178-3184, 1996

被引用文献数

1

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The droplet combustion of n-heptane, benzene and ethyl alcohol was investigated in acoustic fields. The frequencies of the acoustic waves used were around the characteristic frequencies of droplet combustion ; the residence frequency and the diffusion frequency. Under low frequency conditions (70-200 Hz), the experimental results can be interpreted by the mechanism of quasi-steady state combustion, which includes all types of droplet combustion ; the envelope name, wake flame and flame extinction. Under high frequency conditions (300-800 Hz), the combustion is possibly influenced by a diffusional mechanism which is induced by acoustic waves of such high frequency.igh frequency acoustic waves increase the flame luminosity, especially for benzene and n-heptane droplets. This suggests that the high frequency acoustic wave enhances radiant heat transfer from the flame zone to the droplet, and thus the burning rate constant increases.

著者

三上 真人 八木 孝 小嶋 直哉

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B編 (ISSN:03875016)

巻号頁・発行日

vol.64, no.624, pp.2690-2695, 1998

被引用文献数

2

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Occurrence behavior of microexplosion in droplet combustion of fuel mixtures is studied. Experiments were performed using unsupported droplets of n-alkane/n-hexadecane mixtures in normal gravity. It was found that the occurrence of microexplosion is stochastic and cannot be predicted by the classical criterion for microexplosion occurrence using the limit of superheat and the droplet temperature. An occurrence model for the microexplosion based on the homogeneous nucleation theory is presented and shows that the occurrence probability of the microexplosion is determined by the ratio of the liquid phase lifetime to the nucleation time during the quasi-steady vaporization period. The nucleation time is inversely proportional to the nucleation time is inversely proportional to the nucleation rate and superheated liquid volume. The relative value of the droplet temperature and the limit of superheat affects the occurrence probability through the nucleation rate. It can be well explained by the model that the occurrence probability has the maximum value for a certain initial concentration of the fuel mixture.

著者

三上 真人 加藤 秀輝 佐藤 順一 河野 通方

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B編 (ISSN:03875016)

巻号頁・発行日

vol.61, no.582, pp.731-737, 1995

被引用文献数

1

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The effect of gravity on fuel droplets burning interactively has been studied experimentally. Experiments on two droplets aligned horizontally were conducted both in normal gravity and in microgravity. Results show that in normal gravity, oxygen starvation between the flames is not as severe as in microgravity. Natural convection, which supplies oxygen to the flame, is stronger at a smaller initial separation distance when two flames exist separately. The instantaneous burning rate for the same normalized droplet diameter has a maximum in normal gravity when the initial separation distance is changed and decreases monotonically in microgravity with decreasing initial separation distance, except for the initial period of burning. Thus, the effect of gravity, which decreases the burning lifetime, is greatest at a certain initial separation distance.

著者

小野寺 誠 針谷 昌幸 金剛 力 新谷 政樹 何 祺 綿貫 啓一

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 (ISSN:21879761)

巻号頁・発行日

vol.85, no.880, pp.19-00138, 2019 (Released:2019-12-25)

参考文献数

23

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We proposed an advanced mesh generation technique that reuses the proven analysis models by similar sub-part search. The purpose of this research is to reduce interactive mesh improvement work time and to comply with the mesh specifications. It is our feature technique to search sub-parts similar to the archived sub-parts of proven models from new design CAD. In this technique, the similar sub-parts are retrieved from a CAD model described by boundary representation and made correspondence relation surface pairs of a retrieval model (proven model) and a target model (CAD of new design). A similarity score is based on the attributed graphs of a retrieval model and a target model. And, this score is calculated by a geometrical similarity and topological similarity. If there is such search noise, unreusing sub-parts must be canceled by interactive operation. This is an obstacle to automation. Therefore, with the goal of eliminating search noise, we developed a technique to improve the accuracy of similar partial shape retrieval. By quantifying the geometric relationships such as concentric circles and face-to-face distance as similarity, high precision could be realized. It was applied to a door switch cover part of an automobile which is a verification model, and it was confirmed that search noises disappeared.

著者

岡田 昌史 渡辺 将旭 長谷川 将臣

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:18848354)

巻号頁・発行日

vol.79, no.804, pp.2854-2863, 2013 (Released:2013-08-25)

参考文献数

15

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For dynamic control of a robot, a torque/force control will be necessary because the robot model is represented by a dynamic equation. A torque/force control requires a torque/force sensor or a current sensor(for DC servo motor) for feedback loop, however, they occupy large volume and weight or have low precision and time delay. Therefore, the robot system sometimes has a local position control in the motor drivers from the safety point of view. In this paper, we propose a design method of position-based dynamic control using an autonomous control method based on an orbit attractor, which is realized by a simple deformation of the conventional algorithm. In addition, for the orbit attractor control, it is necessary that an orbit of the state variable is not crossing in the state space. When the orbit is very close, vector field of the orbit attractor along the orbit can not be defined correctly. A dimensional expansion of dynamics is also proposed to design a controller. These methods are evaluated by experiments using a two-dimensional biped robot.

著者

井口 雅一 石井 威望 越 正毅

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会誌 (ISSN:00214728)

巻号頁・発行日

vol.75, no.640, pp.738-746, 1972

被引用文献数

1