著者

宮武 昌史

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌D(産業応用部門誌) (ISSN:09136339)

巻号頁・発行日

vol.142, no.4, pp.NL4_1, 2022-04-01 (Released:2022-04-01)

著者

高 英聖 古関 隆章 宮武 昌史

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌D(産業応用部門誌) (ISSN:09136339)

巻号頁・発行日

vol.125, no.12, pp.1084-1092, 2005 (Released:2006-03-01)

参考文献数

15

被引用文献数

22 33

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An algorithm optimizing train running profile with Bellman's Dynamic Programming (DP) is investigated in this paper. Optimal running trajectory of a train which minimizes amount of total energy consumption has been produced under fixed origin and destination, stipulated running time and various track profile. Many previous works on this area adopt the numerical techniques of calculus of variations, Pontryagin's maximum principle, and so on. But these methods often meet some difficulties accounting for complicated actual train running preconditions, e.g. complicated functions which describe electrical motive/brake torque, local constraints of the state variable as speed limitations, non-linear running resistance and variable grade profiles. Basic numerical DP algorithm can cope with such comlicated conditions and give the globally optimal solution. But this method consumes too large computation time for practical uses. We have made the improvements for shorter calculation time of whole optimization process and reducing the numerical error. The confined state space and irregular lattice play most important role for them. Dynamic meshing and effective utilization of system memory also realize shorter computation time. The effectiveness of the proposed method is demonstrated using various complicated running conditions.

著者

林屋 均 宮武 昌史

出版者

一般社団法人 電気学会

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.133, no.12, pp.817-820, 2013-12-01 (Released:2013-12-01)

参考文献数

19

被引用文献数

1

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本記事に「抄録」はありません。

著者

溝口 肇 宮武 昌史 布施 孝志

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌D(産業応用部門誌) (ISSN:09136339)

巻号頁・発行日

vol.133, no.7, pp.700-706, 2013-07-01 (Released:2013-07-01)

参考文献数

19

被引用文献数

2 2

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A train scheduling method to minimize the trip time of passengers under restricted electrical energy is investigated in this paper. This method assumes that the consumed electrical energy of one railway artery, all the vehicles of which are local trains, is restricted to a certain value. The endogenous variables of this method are the running time for each interstation, the consumed energy for each interstation, and the number of vehicles. The solution depends on the Kuhn-Tucker theorem on the constraints of both the number of vehicles and the total amount of consumed energy per unit time. This method enables us to determine the running time for each interstation and the number of vehicles according to the solution, which gives priority to small changes in the running time in interstations over decreasing the number of vehicles. Numerical examples verify the effect of reducing the time increment caused by the restriction in some artery without reducing the number of vehicles. The results also imply that the effect on passengers of each energy-saving method differs for every traffic artery.

著者

久保 興輔 宮武 昌史 首藤 克彦 正田 英介

出版者

The Japan Institute of Electronics Packaging

雑誌

エレクトロニクス実装学会誌 (ISSN:13439677)

巻号頁・発行日

vol.4, no.3, pp.237-240, 2001-05-01 (Released:2010-03-18)

参考文献数

4

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For the electronic equipment, various printed circuit boards are used. Recently, the electronic equipment is getting miniaturized, and insulation reliability of the printed circuit boards becomes the important problem. In this environment, paper phenol base printed circuit boards are produced a lot and mainly used for the consumer article, so that we examined the ionic-migration of paper phenol base printed circuit boards. Generally, the resistance value of the paper phenol base printed circuit board is lowered with continual rapid-dropping and recovering of the resistance value in the high-humidity/temperature test for ionic-migration when it passed about 1500 hours. However, when it passed after 300 hours, the rapid changes of the resistance value by the ionic-migration were observed in our test, and it was observed that the bridging is done between some electrodes of the printed circuit boards.

著者

宮武 昌史 仲佐 翔

出版者

電気学会

雑誌

電気学会研究会資料. TER, 交通・電気鉄道研究会

巻号頁・発行日

vol.2013, no.42, pp.51-54, 2013-09-02

参考文献数

10

著者

佐藤 拓哉 宮武 昌史

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.19-00092, 2019 (Released:2019-12-25)

参考文献数

13

被引用文献数

1

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Battery train is in development as train which can travel in non-electrified section using power supplied from onboard storage system such as lithium-ion battery. However, as characteristics of this type of train, an energy consumption of battery train depends on the state of charge of the storage system. In consideration of these characteristics, we propose a generation method of the timetable which is the most energy-saving when a single battery train travels on a route section containing multiple stations in this research. Although this optimization can be defined as a nonlinear programming problem, we ease to solve this problem using linear approximation to the energy consumption characteristic. In the end, we carried out a simulation in a simple case and achieved 4.7% reduction in energy consumption by the proposed method.

著者

渡邉 翔一郎 近藤 健一 松岡 絢香 宮武 昌史 野田 慶親

出版者

一般社団法人 電気学会

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.135, no.10, pp.676-679, 2015-10-01 (Released:2015-10-01)

参考文献数

9

被引用文献数

1

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1.はじめに 1.1 地球環境問題と鉄道をとりまく背景 近年は地球環境問題に対する意識が高まり,低炭素社会実現への期待が日に日に大きくなっている。そんな中で鉄道は環境親和性の高い乗り物として脚光を浴びている。二酸化炭素排出量