著者

明日 香昌 駒谷 喜代俊

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.121, no.1, pp.68-75, 2001-01-01 (Released:2008-12-19)

参考文献数

11

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For train simulations, there is a well-known train movement model. By using the model, the precise running status of a train at the designated values for the velocity, position, and time, must be obtained to analyze the train movement in detail. However, conventional simulation methods cannot calculate the precise status at the designated value, because they only calculate the running status discretely at fixed interval. To resolve this problem, we propose a simulation method that has two features. First, the method utilizes integral formulas. An expression of velocity is formulated that directly gives the precise running status at the designated velocity. With the expression, we can also formulate expressions for position and time. Second, since the designated values for the three variables are given at one time, we build a framework that contains the above three expressions and performs the calculations in the appropriate order to get the running status corresponding to a designated value firstly fulfilled. The proposed simulation method calculates the required running status without considering errors introduced by the method itself. It also uses a smaller number of calculations than conventional methods. The proposed simulation has various uses from planning to control of railways to which the conventional method has been applied.

著者

高橋 理 駒谷 喜代俊 田村 坦之

出版者

一般社団法人 システム制御情報学会

雑誌

システム制御情報学会論文誌 (ISSN:13425668)

巻号頁・発行日

vol.16, no.7, pp.313-320, 2003-07-15 (Released:2011-10-13)

参考文献数

12

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Software engineering organizations now tend to improve their processes according to such standards as CMM (Capability Maturity Model), a process evaluation model, in addition to improving their software products. This is because it is believed that mature engineering processes can bring high-quality products within the original schedule. It is reported, however, that the result of the improvement activities is strongly related with engineer satisfaction for the process, that is, effective improvement can be expected on the phases where engineers have not been satisfied with. This paper proposes a method to evaluate how much engineers feel the current engineering process needs to be improved, with Descriptive AHP (Descriptive Analytic Hierarchy Process), one of decision making tools. Our method, based on the idea that the necessity evaluation can be related with engineers satisfaction, evaluates four engineering phases under six criteria defined at CMM Level 2, determining which phases should be improved first. As a result of having system engineers use this method, we found that quality assurance activities in the manufacturing and examination phases need to be superior for improvement to other phases.

著者

北川 英裕美 片岡 健司 駒谷 喜代俊

出版者

The Institute of Electrical Engineers of Japan

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.116, no.8, pp.874-882, 1996-07-20 (Released:2008-12-19)

参考文献数

12

被引用文献数

1 1

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This paper presents a computer aided system for making the train timetable, DIAPLAN-II (Train Diagram Planning Support System). It is designed to prepare the timetable of complicated lines including junctions and sections with different number of tracks such as single, double and four. We have already developed the DIAPLAN for double-track lines. It has employed the integrated framework of simulation and scheduling to emulate human experts' scheduling process on a computer, and it has been successfully applied to the co-operative work between man and computer in the timetable planning. Based on this experience, we employ the same framework to develop our new system. In this system, we define some additional functions to adjust the arrival and departure order of trains at a station in our framework, because it is the critical point for making the timetable of those complicated lines. A timetable generated by DIAPLAN-II shows its usefulness in the co-operative timetable planning.

著者

前田 卓志 駒谷 喜代俊

出版者

The Institute of Electrical Engineers of Japan

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.118, no.7-8, pp.836-842, 1998-07-01 (Released:2008-12-19)

参考文献数

6

被引用文献数

1

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For sufficient transportation capacity and passengers comfort and convenience, it is very important to design the suitable lift systems (e. g., the appropriate number of cages, velocity, capacity etc.) using a model which describes real elevator movements.The procedure used in conventional design calculations for office buildings is to determine the transportation capacity for the up-peak traffic situation using a, simple passengers arrival model.This paper presents a new design calculations using balanced traffic model, which can deal with the elevetor movements considering passengers arrival rate. As some performance indexes to evaluate the quality of service can be calculated by using this model, lift system designers can determine the appropriate lift facilities as to satisfy their goals. The validity of the propsed model is also shown by comparing with the measured data in real lift systems.

著者

後藤 幸夫 駒谷 喜代俊 福田 豊生

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society (ISSN:09136339)

巻号頁・発行日

vol.116, no.5, pp.569-577, 1996-04-20

参考文献数

16

被引用文献数

25 6

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Increasing vehicular traffic are causing traffic jam and social economic loss in recent years. Dynamic traffic management systems based on actual traffic conditions are expected to reduce these problems. Computer simulation is a powerful tool to evaluate the system performance of new traffic management system, since it is difficult to evaluate it under various traffic conditions in the real world due to huge costs and safety concerns.<br>In this paper, we propose a new microscopic traffic simulation model by object-oriented programming style. In this model, the street network is composed of nodes and links and vehicles run autonomously in the street network. The autonomous vehicle movement model is composed of decision model that depends on the driver's character and vehicle motion model that depends on the attribution of the vehicle. Then, we analyze the quality of our proposed model and show the effectiveness for evaluating the performance of the traffic management systems.