著者

赤津 観 御供 頌弘 涌井 伸二

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 = 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.128, no.2, pp.125-130, 2008-02-01

参考文献数

11

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This paper proposes a speed and position estimation methods by using a Hall effect sensor. The speed is estimated from the fluctuated current which can be observed on the control axis. The position is estimated from the estimated speed and is corrected from the pulse which is generated by the Hall effect sensor mounted on the machine. Although the speed control range is limitted since this method is based on the back EMF, the speed and the position can be estimated without any motor parameter is used. The prposed method is verified by the experiments which 120W SPMSM is used for the tested machine, the currnet control and the speed control results including the controlable speed range are breifly explained.

著者

柴田 昌明 恩田 寿和 田村 公良

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.119, no.2, pp.151-158, 1999-02

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The paper descries a novel method to extract line segments and circular arcs from the image taken by CCD camera for object recognition. Model based matching is one of the widely used techniques of the object recognition in computer vision, and the position and orientation of the objects are decided with referring the extracted line segments and circular arcs. For the precise and stable decisions of the position and orientation, the accurate extractions of characters are required. These characters are. fast and accurately extracted in the proposed method, while its validity is confirmed in some experiments.

著者

佐藤 貴彦 新明 脩平 仲里 三希 見上 慧 佐藤 智矢 境野 翔 大西 公平

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.131, no.3, pp.283-290, 2011-03-01 (Released:2011-03-01)

参考文献数

19

---

This paper proposes a knee stretch walking method for biped robots; the method involves the use of the toes and heel joints to increase walking strides. A knee can be stretched by switching control variables. By a knee stretch walking with heel contacts to the ground and toe takeoffs from the ground, biped robots can increase their walking stride and speed. The validity of the proposed method is confirmed by simulation and experimental results.

著者

長谷 伸一 持永 芳文 八木 英行 江本 政春

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.930-936, 1998-07-01 (Released:2008-12-19)

参考文献数

8

---

Takasaki-Nagano section, a part of Hokuriku Shinkansen was opened in October, 1997, just before Nagano Winter Olympics. Hokuriku Shinkansen has been electrified by 30kV a. c. commercial frequency AT feeding system.As for the commercial frequency, Japan is divided into two zones: the western part of Japan is a 60Hz zone and its eastern part is a 50Hz zone. Two different power frequencies exist in Hokuriku Shinkansen which passes power frequency borders between different electric power companies. Therefore, in case of a contact fault between two different power frequencies, a beat-formed large fault current will flow, which should be immediately detected and cut off.At present, a distance relay and an AC ΔI type relay are used as protective relays for a feeding circuit of Shinkansen lines. However, it was experimentally made clear that those relays do not operate by a beat-formed fault current which appears in the case of a contact fault between two different power frequencies. For this reason, we have developed and put to practical use a protective relay for a contact fault between two different frequencies, which operates by detecting 55Hz component peculiar to the current caused by the contact fault and also detecting power frequency of an opponent traction substation.They have been installed at a frequency-bordered sectioning post and at traction substations which sandwich the sectioning post.

著者

桂 誠一郎 大西 公平

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.123, no.11, pp.1371-1376, 2003 (Released:2004-06-18)

参考文献数

10

被引用文献数

9 15

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Minimally invasive surgery (MIS) which thinks a great deal of patient’s quality of life (QOL) has attracted attention during about ten years. In this paper, it aims at development of the technology for transmitting force sensation required in medical treatment especially through surgical instruments, such as forceps. In bilateral control, it is a problem how master and slave robots realize the law of action and reaction to the environment. Mechanism of contact with environment and bilateral controller based on stiffness are shown. Master arm in contact with human and slave arm in contact with environment are given compliance, and stable contact with environment can be realized. The proposed method is applied to 3-link master-slave manipulators. As a result, transmission and reproduction of force sensation can be realized. The experimental results show viability of the proposed method.

著者

及部 七郎斎 堀 洋一

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.121, no.12, pp.1250-1255, 2001-12-01

被引用文献数

1

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A novel object transfer system named "Magic Carpet" composed of linear actuator array and driven by autonomous decentralized type control algorithm is proposed. An object is manipulated by a large number of contact points with many actuators, which differs from conventional systems like belt conveyor. In this paper, the control algorithm for such "distributed manipulation" is proposed.<br>Due to recent development of micromachine technology, distributed manipulation becomes more important. This system has a big advantage in its fault tolerance because it has a lot of actuators with poor performance to move a large heavy object. However, it has a serious wiring problem to be solved and homogeneous structure should be introduced because of a large number actuators.<br>To solve these problems, "combined control of central /autonomous decentralized algorithms" is proposed and evaluated by computer simulation and experiment.

著者

東 聖 伊藤 大介 石田 貴仁 岩田 明彦 菅原 賢悟 森本 茂雄

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.139, no.5, pp.495-502, 2019-05-01 (Released:2019-05-01)

参考文献数

15

被引用文献数

2

---

This paper proposes countermeasures to reduce radiated AM radio frequency noise caused by the VVVF (variable-voltage/variable-frequency) inverter system incorporated with an electric railway car. First, the common-mode current flowing through a cooling fin earth line is studied, and the connection change of the line shows good attenuation of the 1.26MHz resonance component. Second, the common-mode current flowing though the motor earth line with a capacitor is focused upon, and the modified connections of the line to the outside of the input common-mode core achieves fine noise reduction in the range from 500kHz to 1.5MHz. In such cases, the existing input common-mode core is utilized to establish the impedance, which is efficient in both the noise reduction and the countermeasure cost reduction. Finally, a current simulation model which is paid attention to the AM radio frequency range is examined with the measured impedance data of the VVVF inverter system. The currents flowing thorough the cooling fin earth line and the motor earth line is simulated, and these simulated currents show good agreement with the measured one.

著者

Guidi Giuseppe Undeland Tore M. Hori Yoichi

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 = 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.128, no.4, pp.418-423, 2008-04-01

参考文献数

9

被引用文献数

11

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This paper presents a converter topology used to interface a bank of Supercapacitors (SC) to a stiff DC-Link, like the one constituted by a typical battery. Main feature of the proposed converter is the reduced ratings of the power electronics switches compared to standard topologies. The capabilities of the proposed system in terms of energy storage and controllability of the power flow in and out the SC bank are identical to those of a conventional system, making the solution very attractive in terms of cost and efficiency in a wide number of applications. Theoretical principles underlying the converter operation are given, along with an experimental evaluation of the proposed solution, showing its practical feasibility.

著者

持永 芳文 浜田 博徳 新井 浩一

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.110, no.1, pp.41-50, 1990-01-20 (Released:2008-12-19)

参考文献数

6

被引用文献数

1

---

In the single-phase AC railroad electrification, the voltage unbalance of three-phase electric power system has to be reduced. For this purpose, three-phase power is converted to two-phase power by the Scott-connected transformer, and the electric power is received from a powerful or high-tension source.Recently, regenerative braking has come to be applied to electric rolling-stocks, but occasionally the regenerative brake increases the voltage unbalance in the three-phase electric power source with the ordinary two-phase feeding system. So, in some cases unbalance power compensation may be found more profitable than the Scott-connected transformer.This paper describes a theoretical study and results of a test on a mini-model which uses a scalene Scott-connected transformer, switched reactors and capacitors for the purpose of reducing the voltage unbalance in the three-phase electric power source. By this method, main phase (M) and teaser transformer (T) voltages of scalene Scott-connected transformer secondary side are decided by a single load power factor, and the sum of the capacities of the reactors and the capacitors is equal to the apparent power of single-phase load.For example in SCR switched control of the reactors/capacitors which has four steps in power running and two steps in regenerative braking, the voltage unbalance in the three-phase electric power source can be reduced satisfactorily.

著者

山口 仁 渡部 俊春 山田 一

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.1, pp.94-99, 1995-12-20 (Released:2008-12-19)

参考文献数

10

被引用文献数

1 1

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Force between an electromagnet and an iron piece is usually calculated with a equation of Maxwell's stress, and for the exact result, the integration of stress is made along a route away from the iron. It, however, is necessary to calculate magnetic flux density components paralell to the integration route as well as perpendicular ones.The authors propose a new method of calculation using FEM. This method presents that the integration of Maxwell's stress is made on the surface of an iron piece, and magnetic flux is regarded perpendicular to the iron surface. Calculated values of magnetic force, attractive force and restoring force under small parallel displacement to pole face, have been compared with measured ones on an experimental model. The following results are obtained. (1) The magnetic force is calculated using the results of FEM analyses where the number of nodes has been less than 1000. The differences between the calculated and the measured values are smaller than 5%. (2) To obtain the above results, it is necessary that relative permeability of the iron piece is larger than 100 and the side length of each triangle element near the iron corner is less than 2% of the gap length.

著者

平田 光男 荻原 努 岡本 仁史 足立 修一 長村 謙介 小林 真也

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 = 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.127, no.11, pp.1133-1140, 2007-11-01

参考文献数

8

---

We have developed the shift lever with a spring connected link. It can detect the reaction force to the operator by using inexpensive displacement sensors such as potentiometers. For this system, we propose a model-based power assist control method. The proposed control system is composed of a reference generator and a feedback controller. The reference generator is introduced to generate an ideal reaction force to the operator. The feedback controller is designed by <i>H</i>_&infin; control theory to achieve disturbance attenuation. The effectiveness of the proposed method is shown by experiments.

著者

渡邉 翔一郎 楊 哲 古関 隆章 近藤 圭一郎 水間 毅 濱﨑 康宏

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.134, no.8, pp.767-775, 2014

被引用文献数

16

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This paper presents a manual train operation assistance method for limiting braking power to avoid regeneration cancellation and to save train operation energy. This assistance system consists of on-board computers and interface devices. The braking assistance command is generated from a "dictionary" prepared to increase regenerated energy without any extension of train running time. In order to consider the power limitation and resolve assistance operation problems in terms of the operation delay time, this method was evaluated on a revenue service line. This paper proposes a "best effort method" for energy-saving train operation that does not use the conditions of other trains since train drivers cannot obtain information on the actual status of other trains in present railway systems. On-track tests showed that the power-limiting brake was effective on energy-saving for a train operation. The practical problem of the man machine interface for driver assistance was also intensively studied.

著者

ジダン ハサン 辻 輝生 Hao Shuang-Hui 小黒 龍一

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.120, no.3, pp.404-409, 2000-03-01

被引用文献数

3 5

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Recently, in the machinery field, the outoput of actuators becomes greater by the demands for high speed response and high accuracy positioning control. On the other hand, the demands for cost and lighter weight make the machine stand slimer. As a result, the machine stand vibrates at each opertation of actuators and this vibration possibly affects a positioning control. That is, the settling time of the positioning control is prolonged. In order to remove this influence, this paper shows the method of a feedforward controller design for a system including not only a machine but also a machine stand. Moreover, the model for this system is proposed and identified by the genetic algorithm in order to make the feedfoward controller design possible. Effectiveness of the proposed method is confirmed by the experiments.

著者

長山 格 宮原 彬 島袋 航一

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.139, no.2, pp.158-165, 2019

被引用文献数

2

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<p>This paper proposes a new lazy learning algorithm, named balanced-kNN, for high performance robust classification of noisy patterns. K-nearest neighbor (k-NN) is a simple and powerful method with a high accuracy for various real world applications using unbiased datasets. However, noisy datasets are often gathered in real world applications. This paper presents a new robust algorithm, balanced-kNN, and compares the prediction accuracy with some conventional methods by using UCI datasets. The experimental results show that the balanced-kNN algorithm can perform more efficient classification of noisy data than the normal-kNN and weighted-kNN algorithms.</p>

著者

長田 康敬 河口 万由香 山田 親稔

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.139, no.2, pp.143-148, 2019

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<p>In this paper, a design technique for ternary logic function circuits based on CMOS design are proposed. The circuits operate as B-ternary (binaric ternary) logic functions that are useful in asynchronous systems or self-checking circuits of fault-tolerant systems. Further, a special logic circuit, D-element, is proposed. D-element is designed for asynchronous systems like Mullers C-element in binary circuits. The circuits' SPICE simulations are provided to show their efficacy.</p>

著者

長山 格 上原 和加貴 宮里 大也

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.139, no.2, pp.149-157, 2019

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<p>An alternative learning and its application to construct an overviewing human detection system (OHDES-V2) of flying drone for emergency rescue and investigation is presented in this paper. In this system, a deep neural network and alternative learning are used key techniques for object recognition from a free viewpoint. Simple appearance-based characteristics is determined from captured images, and the system uses a deep neural network to automatically classify human body, automobiles and so forth. The proposed system shows that several objects can be recognized from a bird's-eye view. Experimental results show that the system can effectively recognize four types of objects and walking persons with accuraces of 98.5% and 97.12%, respectively.</p>

著者

安里 健太郎 長堂 勤

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.139, no.2, pp.136-142, 2019

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<p>In this study, we developed a current sensorless voltage driven magnetic levitation system with a Hall element displacement sensor using Kalman filter. The system costs less and has higher portability than the current driven system developed in a previous study, and is utilized effectively for model-based development education. However, the use of the displacement sensor for a voltage driven magnetic levitation system causes two problems, namely compensation for measurement error and correction of Hall element output voltages in the sensor. Therefore, we have proposed compensation and correction methods using Kalman filter. To verify the validity of the proposed methods, a magnetic levitation control experiment with the developed system was conducted.</p>

著者

城間 康 安富祖 仁 諏訪 竜一 金城 篤史 殿岡 裕樹 加賀 武史 長山 格 玉城 史朗 マハラジャン ガウリ

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.139, no.2, pp.166-173, 2019

被引用文献数

1

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<p>Mango is a popular seasonal fruit in summer, and mango production in the Okinawa prefecture is the largest in Japan. However, the growth process of mangoes is susceptible to changes in sunshine, temperature, and other factors. In this research, to produce mangoes without being influenced by the natural environment, we will develop a production system that can positively realize environmental measurement and control by using an IoT sensing system. Specifically, we introduced local CO₂ application technology and a supplemental LED lighting system with the aim of activating photosynthesis by mango trees.</p>

著者

加藤 司 長山 格 玉城 史朗

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.139, no.2, pp.127-135, 2019

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<p>We developed a mobile learning system for fishery and ocean techniques using video contents. The system aims to improve the current situation in the field of education on fishery and ocean for skill succession. The proposal is based on the industry-school education process for skill succession. By accessing the web site and watching practical videos, the users can learn methodologies on fishery and ocean. As a result, we showed that the system is effective for sharing and succession of techniques for the learner. Application of the proposed system in the class showed improvement in the students' autonomous learning.</p>

著者

城間 康 安富祖 仁 金城 篤史 長山 格 玉城 史朗

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.139, no.2, pp.174-179, 2019

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<p>Crop growth is influenced by various environmental factors. As a condition for effective plant growth, it is necessary that control of the habitat environment, such as soil moisture content, temperature, humidity, solar radiation amount, is adequately delivered. We focused the fact that soil moisture is important. It is desirable that moisture is uniformly distributed in the soil. In order to avoid physiological disorders caused by water related stress on agricultural crops, it is necessary to use soil with appropriate permeability. By calculating and estimating some characteristic amount related to water permeability, it is possible to identify soil with appropriate water permeability. In this research, we realize the visualization of the planar soil moisture volume by arranging the soil moisturemeter at multiple points. In addition to a system that realizes planar visualization of soil moisture, we propose a method for estimating soil permeability parameters in combination with computer simulation.</p>