著者

石綿 良三

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 2012.18 (ISSN:24242691)

巻号頁・発行日

pp.321-322, 2012-03-08 (Released:2017-06-19)

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The phenomena with relation to fluid mechanics are often taken up in books on science for popular readers. However, the explanation on principle of them has been described under misunderstood knowledge on fluid mechanics in many books. It seems the reason that the many authors are not understood fluid mechanics enough. Also, there is the further reason in the descriptions involved mistaken explanations in many books. In present study the mechanism of transmission of so misunderstood explanations has been considered, and the diffusion of them has been investigated. It is also examined and proposed how to prevent the transmission and diffusion of the misunderstood knowledge.

著者

石橋 正二郎 田中 聖隆 前田 洋作 吉田 弘

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 2021.26 (ISSN:24242691)

巻号頁・発行日

pp.17C09, 2020-03-13 (Released:2021-03-02)

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There are lots of knowledge gaps concerning the sea ice of the Arctic Ocean, such as sea ice thickness, sea ice dynamics and sea ice – ocean interactions. Therefore JAMSTEC is now developing a special platform that will be able to move under ice and measure various kinds of data continuously and automatically. It is an intelligence underwater drone for the Arctic Ocean named as COMAI-Drone (COMAI-Drone:Challenge of Observation and Measurement under Arctic Ice - Drone). Now its proto-type have been already designed and initiated to build. Additionally, some aid systems, which can detect its position, can detect the relative direction to a support ship and can communicate between the drone and the support ship, are now developing. At the same time, watertank-tests and field-tests have been conducted gradually. In near future, COMAI-Drone will collect invaluable data under the sea ice in the Arctic Ocean. In this paper, its outline including its mechanism, functions and operation system are described.

著者

木村 真也 相山 康道

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 2010.16 (ISSN:24242691)

巻号頁・発行日

pp.215-216, 2010-03-09 (Released:2017-06-19)

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In our study, our purpose is to give human dexterousness about force sense to robot and we use Jenga game as its target. This paper describes our strategic implementation how robot remove blocks from Jenga tower. At first, we suggest Jenga statics model. A block which can be removed most safely is chosen, using this model. Robot judges that it can remove a block and removes after measuring actual static force and comparing it with model's value.

著者

高原 弘樹 新庄 拓也 中野 寛

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 2016.22 (ISSN:24242691)

巻号頁・発行日

pp._OS1105-1_-_OS1105-2_, 2016-03-10 (Released:2017-06-19)

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In recent years, the vibration system which has negative mass characteristics, called meta-material, attracts attention. This system consists of two single-degree-of-freedom system. This two-degree-of-freedom system can be represented to an equivalent single-degree-of-freedom system. In case of the subsystem without a damping, the effective mass of this equivalent system has the negative mass characteristics. When the damping of the system is taken into consideration, the effects of the damping on these negative mass characteristics are not clarified. The effects of damping upon characteristic of vibration system with negative effective mass are investigated. The condition of the negative mass characteristics is derived with a damped subsystem. The effects of the damping of subsystem on the negative mass characteristics are discussed.

著者

大河内 信夫 板倉 嘉哉 堤 一郎 白井 靖幸

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 2007.13 (ISSN:24242691)

巻号頁・発行日

pp.171-172, 2007-03-15 (Released:2017-06-19)

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The authors studied Fujiwara's water-wheels for irrigation which were built at Kazusa region in Chiba prefecture. They surveyed literature on bucket chain conveyor system for water in the Edo period. There were 3 materials concerned with Fujiwara's water-wheel. The authors restored Fujiwara's water-wheel bucket which was drawn on the Report of Archaeological Investigation carried out the Fujiwara-Type scoop wheel, No. 1 and 2 in Yoro, Ichihara city, Chiba prefecture. They compared data of Fujiwara's water-wheel bucket restored with data of literature for Fujiwara's water-wheel. Fujiwara's water-wheel power was calculated from data of the bucket restored.

著者

原田 大輔 榊原 潤

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 2017.23 (ISSN:24242691)

巻号頁・発行日

pp.201, 2017 (Released:2017-06-19)

著者

青山 拓哉 天谷 賢児 福永 明 檜山 浩國 濱田 聡美

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 2016.22 (ISSN:24242691)

巻号頁・発行日

pp._OS0108-1_-_OS0108-2_, 2016-03-10 (Released:2017-06-19)

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Evaporation behavior of small droplet on wafer with various film was investigated. The droplet evaporation process was categorized into two types, i.e. constant contact radius (CCR) and constant contact angle (CCA) types. In the previous research, the evaporation behavior of relatively large droplets have reported and it was confirmed that the behavior was able to predict by a simple diffusion model. In this study, the same model was applied to the small droplet. As a result, the developed model was agreed with the experimental data in the case of relatively small droplets.

著者

佐野 紘平

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 2007.13 (ISSN:24242691)

巻号頁・発行日

pp.539-540, 2007-03-15 (Released:2017-06-19)

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交通事故死者数の半減が日本の国家目標になっている。技術史上の大発明であるシートベルトと車体構造の進化により、交通事故による24時間以内死亡者数は減少しているが重傷者数は増加しており、交通弱者である子供(15歳以下)ならびに高齢者の死亡・重傷者合計数が増加している。死者・重傷者の半減に貢献するために、最適化設計されたシートベルトと故池田正彦氏が発明した衝撃緩衝装置を組み合わせて、乗員保護効果を極大化することを提案する。さらに、高齢者の認知・反応機能劣化に対応して、RFID装置を歩行者・自転車乗用者認識用のエージェント指向通信・放送システムとして適用することを提案する。

著者

金子 昌太郎 奥山 淳

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 2019.25 (ISSN:24242691)

巻号頁・発行日

pp.19G02, 2019 (Released:2019-09-25)

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The reaction wheel is a mechanical device for stabilizing the posture of the controlled object by the reaction torque generated when the flywheel is rotated. When applying the reaction wheel to the controlled object, it is necessary to determine the appropriate size of the flywheel, the position to be mounted, the required torque, and so on. However, research on the size and installation position of the flywheel has not been conducted. Therefore, in this study, we construct a model of reaction wheel system on Gazebo which is a 3D dynamic simulator equipped with multiple physical engines. And, we change the various conditions of the flywheel using the model built on Gazebo and consider the influence on posture stability. In addition, by using a robot operating system (ROS) having a coordination function with Gazebo, we control the reaction wheel system on Gazebo.

著者

福田 聡 中島 求

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 2017.23 (ISSN:24242691)

巻号頁・発行日

pp.1616, 2017 (Released:2017-06-19)