著者

石谷 清幹

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.55, no.405, 1952-10-05

著者

門田 和雄

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.112, no.1086, 2009-05-05

著者

門田 和雄

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.108, no.1038, 2005-05-05

著者

横山 良平 伊東 弘一 湯浅 芳郎 陸 暁茜

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.573, pp.1759-1766, 1994-05-25

被引用文献数

1

---

An optimal unit sizing method is developed for hybrid power generation systems utilizing photovoltaic and wind energy. Equipment capacities and electric maximum demand are determined so as to minimize the annual total cost and annual energy consumption from the viewpoints of economy and energy conservation, respectively. This optimization problem is considered as a multiobjective one, and a discrete set of Pareto optimal solutions is derived numerically using the weighting method. Two systems interconnected with the electric power grid are inventigated : one has the option of reverse power flow into the grid, and the other, no option. By carrying out some case studies, the trade-off relationships between the two objectives are clarified, and optimal values of equipment capacities are determined. The effect of electricity deficit on unit sizing is also investigated.

著者

天野 武弘

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.109, no.1056, pp.899-902, 2006-11-05

被引用文献数

1

著者

安倍 賢一 長野 靖尚 近藤 継男

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. B編 (ISSN:03875016)

巻号頁・発行日

vol.60, no.573, pp.1743-1750, 1994-05-25

被引用文献数

3

---

We propose a new two-equation heat-transfer model which is modified from the model developed by Nagano, Tagawa and Tsuji (Proc. ASME/JSME Thermal Eng. Joint Conf., 3 (1991), 233). The main improvement is made by introducing the Kolmogorov velocity scale, u_ε≡(νε)^<1/4>, instead of the friction velocity u_τ, to account for the wall-limiting behavior. After investigating the characteristics of various time scales for the heat-transfer model, we employed a composite time scale which gives weight to a shorter scale among the velocity- and temperature-field time scales. With these modifications, it is shown that the present model quite successfully predicts the turbulent heat transfer in a boundary layer subjected to sudden change of heat flux, and in a separating and reattaching flow downstream of a backward-facing step.

著者

水谷 義弘 片桐 幸徳 多田隈 建二郎

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.117, no.1142, pp.51-52, 2014-01-05

著者

下間 頼一 塩津 宣子 亀谷 勝 緒方 正則

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2007, no.5, pp.93-94, 2007-09-07

---

The thought of Circular Heaven and Square Earth is the Chinese traditional thought. The root of the thought is Jade disc (玉壁) and Jade cube (玉〓) at Liangzhu culture (良渚文化). Jade disc is a circular disc with a small hole at center of it. Jade cube is almost a rectangular solid body with a big hole within it. Authors performed field survey in Liangzhu culture area. The places are Liangzhu ruins (3300-2000BC) and ruins of Yin dynasty (1600-1046BC) in Anyang (安陽). In Yin Museum, authors researched oracle bone inscriptions.

著者

清水 創太 Burdick Joel W.

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.733, pp.2591-2596, 2007-09-25

被引用文献数

1

---

This paper aims at acquiring robust feature for rotation-, scale-, and translation-invariant image matching from a space-variant image by a fovea sensor. A proposed model of eccentric compensator corrects deformation in a log-polar image when the fovea sensor is not centered at a target image, that is, eccentricity exists. An image simulator in discrete space implements this model by its geometrical formulation. This paper also proposes Unreliable Feature Omission (UFO) using Discrete Wavelet Transform. UFO reduces local high frequency noise appeared in the space-variant image when the eccentricity changes. It discards coefficients when they are regarded as unreliable, based on digitized errors of the input image by the fovea sensor. The first simulation estimates the compensator by comparing with other polar images. This result shows the compensator works well and its root mean square error (RMSE) changes only by up to 2.54 [%], in condition of the eccentricity within 34.08 [°]. The second simulation shows UFO works well for the log-polar image remapped by the eccentricity compensator, when white Gaussian noise (WGN) is added. The result by Daubechies (7, 9) biorthogonal wavelet shows UFO reduces the RMSE by up to 0.40 [%] even if the WGN is not added, when the eccentricity is within 34.08 [°].

著者

西村 智行 持丸 義弘

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. B編 (ISSN:03875016)

巻号頁・発行日

vol.63, no.611, pp.2309-2315, 1997-07-25

被引用文献数

1 1

---

A spectral finite difference method with domain decomposition is used to solve the Navier-Stokes equation for incompressible fluids. In the domain decomposition method, some subgrids consisting of multiple orthogonal curvilinear coordinate systems and of overlapping region (s) are adopted, and one-dimensional interpolation is applied to the overlapping region in the case of two-dimensional analysis to obtain neighboring values corresponding to a virtual boundary. Mass conservation on a virtual boundary is assured using a mass imbalance correction. Present numerical analyses for two-dimensional, internal, doubly-connected or triply-connected flow fields consisting of cylindric and elliptic boundaries show good consistency, accuracy and efficiency.

著者

吉武 裕 末岡 淳男 森山 智樹 山崎 正則

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.66, no.646, pp.1785-1792, 2000-06-25

被引用文献数

6

---

This paper deals with the quenching problem of self-excited vibrations by using a device composed of a Hula-Hoop and a generator. This device is also additionally able to generate electricity. The Runge-Kutta-Gill method is applied to the numerical analysis of a Rayleigh's type self-excited system with the device. The solutions obtained are divided into two main categories ; periodic solutions and chaos accompanied by Hula-Hoop's vibration and rotation. An optimum approach for quenching the self-excited vibration was discussed. As a result, it was clarified that for the optimum design of the device there existed a certain relation among the moment of inertia, the mass of Hula-Hoop and the capacity of generator, and the vibration at that time was chaos as in the impact damper which we analyzed before. The condition of maximum generation of electricity was not equal to that of minimum vibration amplitude of the self-excited system. An experiment was performed to quench vortex-induced vibration and to generate electricity by using the device. The experimental results agreed well qualitatively with those from the numerical computational analysis.

著者

佐藤 学 伊藤 勝宏 小野寺 収 高山 和喜 辻田 誠

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. B編 (ISSN:03875016)

巻号頁・発行日

vol.55, no.509, pp.95-100, 1989-01-25

被引用文献数

1

---

A new concept of a super charger for diesel engines is proposed and its performance is examined by TVD numerical simulation. The structure of the super charger has a simple duct-valve system which allows the feeding of compressed inlet air to the engine cylinder by an exhaust-gas driven chock wave. The two-dimensional unsteady flow of this duct-valve system was simulated by TVD numerical scheme applied to the Euler equations. It was found that the present supercharger has a performance which is preferable to low engine speed. The complicated wave interactions are simulated in detail.

著者

横堀 誠一 笠木 伸英 平田 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. B編 (ISSN:03875016)

巻号頁・発行日

vol.49, no.441, pp.1029-1039, 1983-05-25

被引用文献数

3

---

本論文は二次元衝突噴流のよどみ領域における流動構造および伝熱機構を実験的に明らかにしたものである.流れの可視化によってよどみ域は大きなスケールの乱流渦構造がスパン方向に非定常に発生することを明らかにしこれらの構造が自由噴流せん断部の渦糸の伸張から生じていることを示した.ついでにこの構造がよどみ点での伝熱促進に果たす役割について顕著な効果のあることを非定常温度場の可視化によって示した.

著者

林 熙崇

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2000, no.4, pp.521-522, 2000-07-31

著者

涌井 伸二

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.63, no.612, pp.2693-2700, 1997-08

参考文献数

11

被引用文献数

7

---

The piezo element as a representative displacement type actuator elicits a high-speed response in comparison with the electromagnetic motor. Recently, there has been much research carried out using this feature. However, most of the studies are aimed at realizing higher precision, while there is very little research regarding high-speed. When the positioning mechanism is given, improvement of the positioning performance is entrusted to the feedback loop. At this point, we expect that some methods are prepared in order to improve the positioning performance, because an optimal method can be selected under an actual constrained condition. When we try to realize higher positioning via the feedback loop, we can enumerate technical items, such as realization of the high-speed drive amplifier, optimal tuning of the compensator, and the tuning degree of freedom extension by adding a minor loop. In this paper, these engineering techniques are summarized.

著者

笹村 越郎

出版者

一般社団法人日本機械学会

雑誌

機械學會誌

巻号頁・発行日

vol.35, no.180, pp.365-367, 1932-04-01

著者

清水 幸丸 村上 光清 葛原 定郎 永房 誠 杉野 公一

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. B編 (ISSN:03875016)

巻号頁・発行日

vol.47, no.417, pp.729-738, 1981-05-25

被引用文献数

1

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本研究は, ディフューザの中心線がねじれS字状およびコイル状に曲げられた, いわゆる空間曲りデュフューザについて, その性能を調べたものである. このようなディフューザでは, 流入速度が通常の曲り管出口における速度分布のように二次流れを伴って不均一になっている場合には, この不均一流がディフューザの曲りと関連して, ディフューザ内に強い二次旋回成分を発生することとなり, はく離の発生が防止される. そして直線円すいディフューザよりも高い圧力回復効率を示すことを明らかにした.

著者

盛 再権 山藤 和男

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.61, no.583, pp.1042-1049, 1995-03-25

被引用文献数

5 1

---

In the previous paper, in order to emulate a human riding a unicycle by a robot, a new model with two closed-link mechanisms and a controlling rotor (turntable) was proposed. By analyzing that model, we showed through simulation that both longitudinal and lateral stability of a human riding a unicycle can be satisfactorily emulated. In this study, we designed and manufactured a unicycle robot based on an idea proposed in the previous paper. Using the new method for detecting the posture of the robot in three dimensions, we conducted experiments on this robot under the proposed control method. The robot's posture was stabilized successfully in both longitudinal and lateral directions in three dimensions, and driving control was realized. The experimental results tell us that the proposed model and control method are effective in emulating the human riding a unicycle system by a robot. We believe that this is the first completely successful study in emulating a human riding a unicycle by a robot.

著者

石光 俊介 ステファン エリオット

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.2002, no.40, pp.341-342, 2002-02-21

著者

大岡 昌博 小林 光男 篠倉 恒樹 鷺沢 忍

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.531, pp.2919-2925, 1990-11-25

被引用文献数

2

---

In order to improve the intelligence of a robot with a sense of touch, we have developed a tactile sensor array which can detect the distribution of the three components of a force vector. The tactile sensor consists of a 6×15 matrix of 3×3 mm sensing sites; each site is made of two single-crystal silicon rings on which semiconductor strain gauges are formed by means of a semiconductor processing technique. In this paper, we have introduced formulas to calculate applied force/moment, a center of distributed pressure, and some parameters of slip and hardness, and then carried out sensing tests in order to validate those formulas. Experimental results show that applied force/moment and the center of distributed pressure can be detected with practical accuracy. Slipping, rolling and rotating states can be distinguished by combinations of the slip parameters. Moreover, mechanical properties can be sensed by means of combinations of the hardness parameters. A lump in a soft object can be recognized using an adequate threshold method.