フルテキストURL fulltext.pdf
著者 Tsunata, Ren| Takemoto, Masatsugu| Imai, Jun| Saito, Tatsuya| Ueno, Tomoyuki|
キーワード Pressing Stator cores Magnetic cores Torque Atmospheric modeling Presses Manufacturing Mass production Axial-flux permanent magnet machine soft magnetic composite (SMC) PMSM tooth-tips torque press process semi-closed slot structure axial gap motor mass production YASA motor shoe
発行日 2023-10-04
出版物タイトル IEEE Access
11巻
出版者 Institute of Electrical and Electronics Engineers
開始ページ 109435
終了ページ 109447
ISSN 2169-3536
資料タイプ 学術雑誌論文
言語 英語
OAI-PMH Set 岡山大学
著作権者 © 2023 The Authors.
論文のバージョン publisher
DOI 10.1109/ACCESS.2023.3321829
Web of Science KeyUT 001086321100001
関連URL isVersionOf https://doi.org/10.1109/ACCESS.2023.3321829
フルテキストURL fulltext.pdf
著者 Tsunata, Ren| Yokomichi, Keito| Takemoto, Masatsugu| Imai, Jun|
キーワード Variable flux memory motor hybrid excitation motor traction applications EV HEV six-step operation one-pulse drive output power density
発行日 2023-08-03
出版物タイトル IEEE Access
11巻
出版者 Institute of Electrical and Electronics Engineers
開始ページ 82024
終了ページ 82036
ISSN 2169-3536
資料タイプ 学術雑誌論文
言語 英語
OAI-PMH Set 岡山大学
論文のバージョン publisher
DOI 10.1109/ACCESS.2023.3301809
Web of Science KeyUT 001047221300001
関連URL isVersionOf https://doi.org/10.1109/ACCESS.2023.3301809
著者 Tsunata, Ren| Takemoto, Masatsugu| Imai, Jun| Saito, Tatsuya| Ueno, Tomoyuki|
キーワード Aspect ratio axial-flux machine axial-gap motor cooling high efficiency mass production PMSM radial-flux machine soft magnetic composite thermal characteristic
備考 © 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.| This fulltext file will be available in Mar. 2025.|
発行日 2023-03-13
出版物タイトル IEEE Transactions on Industry Applications
59巻
3号
出版者 Institute of Electrical and Electronics Engineers (IEEE)
開始ページ 3353
終了ページ 3367
ISSN 0093-9994
NCID AA00667900
資料タイプ 学術雑誌論文
言語 英語
OAI-PMH Set 岡山大学
著作権者 © 2023 IEEE.
論文のバージョン author
DOI 10.1109/tia.2023.3255845
Web of Science KeyUT 001061319100099
関連URL isVersionOf https://doi.org/10.1109/tia.2023.3255845
フルテキストURL IFAC_49_8_7.pdf
著者 Imai, Jun| Noso, Katsuyuki| Takahashi, Akiko| Funabiki, Shigeyuki|
キーワード Distributed parameter systems Method of weighted residuals Boundary conditions Reduced-order models
備考 This is an Accepted Manuscript of an article published by Elsevier|
発行日 2016-08-09
出版物タイトル IFAC-Papers OnLine
49巻
8号
出版者 Elsevier
開始ページ 7
終了ページ 12
ISSN 2405-8963
資料タイプ 学術雑誌論文
言語 日本語
OAI-PMH Set 岡山大学
著作権者 https://creativecommons.org/licenses/by-nc-nd/4.0/deed.ja
論文のバージョン author
DOI 10.1016/j.ifacol.2016.07.410
Web of Science KeyUT 000381505200003
関連URL https://doi.org/10.1016/j.ifacol.2016.07.410
著者 小西 正躬| 中野 孝一| 今井 純|
発行日 2011-06-01
出版物タイトル 鉄と鋼
97巻
6号
資料タイプ 学術雑誌論文
JaLCDOI 10.18926/44495
フルテキストURL mfe_045_001_014.pdf
著者 Akiyoshi, Tatsuro| Imai, Jun| Konishi, Masami|
抄録 This paper presents a method of the controller design for the handling machine by using dsPIC(Digital Signal Processor + Peripheral Interface Controller). Recently, many manufacturing robots are operated in manufacturing facilities, with the aim of labor, cost saving, and improvement of the productivity. Such robots need to have positioning performance of high precision and simultaneously to save cost. In this paper, a digital optimal servo controller is designed, and it is implemented into our barebones controller which involves dsPIC. We have designed and manufactured the controller which is added suitable peripherals to improve the consistency between the mechanical machine operating in continuous time and controller in discrete time. The significance of this research is that digital implementation of the embedded system which has performance-limitation has ensured a comparable result, against the one with PC which has broad utility. When it is used as a controller, it is possible to restrain product prices greatly equivalent PC precision. We demonstrate potential that good control can be achieved even with low cost. Our research has lead to the viability of lower cost and higher performance system for the production process at factories.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2011-01
45巻
開始ページ 1
終了ページ 14
ISSN 1349-6115
言語 英語
著作権者 Copyright © by the authors
論文のバージョン publisher
NAID 120002905951
著者 竹永 洋貴| 小西 正躬| 今井 純|
発行日 2009-11-11
出版物タイトル Proceedings : Fifth International Workshop on Computational Intelligence & Applications
2009巻
1号
資料タイプ 会議発表論文
JaLCDOI 10.18926/17835
フルテキストURL Mem_Fac_Eng_OU_43_32.pdf
著者 馬渕 周治| 小西 正躬| 今井 純|
抄録 A tractor-trailer vehicle in the factory might move on the route determined beforehand. However, automation of a tractor-trailer vehicle is difficult so that it is necessary to consider the nonlinearity of a vehicle and a trailer. In this research, the effective tracking control method of a tractor-trailer vehicle is proposed. The control method using time-state control form for a preview control is presented, and be applied a tractor-trailer vehicle with nonholonomic characteristics. Results of numerical experiments are presented to check effectiveness of the proposed control method.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2009-01
43巻
開始ページ 32
終了ページ 38
ISSN 1349-6115
言語 英語
論文のバージョン publisher
NAID 120002308736
JaLCDOI 10.18926/17844
フルテキストURL Mem_Fac_Eng_OU_43_75.pdf
著者 大江 啓太| 小西 正躬| 今井 純|
抄録 As is well known, an advanced knowledge and know-how are needed in the design and the diagnosis work. Further, human experts can cope with the recent trend of customers needs. Therefore, the design and the diagnosis work have been privately performed in the past, and its information cannot be shared. In addition, the number of experts is decreasing. It is a very important problem to maintain and to extend experts technologies having been built up. For the purpose, methods and systems for technical inheritance of the advanced techniques of the skilled engineers are needed to train the unskilled operators and also can assist skilled operators. In this research, attention is focused on the design of analog filter circuit. To attain the target, the circuit structural classifier system to support design work is developed. Furthermore, simulation technology for hot strip rolling mills based on distributed agents is presented aimed to develop tools for the diagnosis of hot strip rolling mills operation.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2009-01
43巻
開始ページ 75
終了ページ 92
ISSN 1349-6115
言語 英語
論文のバージョン publisher
NAID 120002308900
JaLCDOI 10.18926/17841
フルテキストURL Mem_Fac_Eng_OU_43_55.pdf
著者 井上 真一郎| 小西 正躬| 今井 純|
抄録 In this research, an image processing method and a system for inspection support of a rod figured cutting tool are developed. As is well known, the visual inspection of a cutting tool by image processing is not easy, because cutting blade have a helical blade structure. To cope with the problem, an experimental facility with rotation and longitudinal tool shift functions to enable acquisition of blade surface pictures along a cutting rod is developed. The type of the defect treated in this paper is the spot of coating on blade surface. To judge the quality of the processed image of blade surface, neural network with autonomous learning is used. The processed image of cutting tool is divided into 64 × 64 blocks used for the input to the neural networks. Before input, each block data is preprocessed applying a edge detection filter and a transformation by the discrete fourier transform (DFT). Using these technologies, the experimental inspection system is built and tested to check the capabilities of the inspection algorithms. The diagnostic performance of the surface defect of a cutting tool was confirmed. There remained a problem to mis judge the normal tools as the defect.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2009-01
43巻
開始ページ 55
終了ページ 60
ISSN 1349-6115
言語 英語
論文のバージョン publisher
NAID 120002308973
JaLCDOI 10.18926/17839
フルテキストURL Mem_Fac_Eng_OU_43_49.pdf
著者 赤松 慎也| 小西 正躬| 今井 純|
抄録 In this paper, the controlled target is the SCARA robot with two links, and the object is fine control of the arm head position of the robot. To attain the object, Internal Model Control (IMC) is introduced. A nonlinear equations are for robot dynamics formulated by solving Lagrange equation, and is linearized to design control system by IMC. The controller of IMC is designed or synthesisted as the inverse system of the linearized model, and IMC filter model is selected. Also, reference filter is introduced to make the improvement of performance. The result of control performance by IMC is compared with that of PID numerically, accuracy and incoherency are confirmed.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2009-01
43巻
開始ページ 49
終了ページ 54
ISSN 1349-6115
言語 英語
論文のバージョン publisher
NAID 120002308854
JaLCDOI 10.18926/17837
フルテキストURL Mem_Fac_Eng_OU_43_39.pdf
著者 桑嶋 崇行| 今井 純| 小西 正躬|
抄録 This paper presents method of the controller design for one link arm with parametric uncertainty. Recently, many manufacturing robots are operated in manufacturing facilities, with the aim of labor and cost saving or improvement of the productivity. Such robots need to have positioning performance of high precision. In condition that there is an uncertainty in plant dynamics, desired control performance may not be attained because the controller is designed according to the mathematical model of a plant. So it is important that the designed control system have a robust control performance. In this paper, the robust controller is designed using Quantitative Feedback Theory (QFT) for one link arm with parametric uncertainty. Simulation experiments are run for control system designed by using QFT and conventional method. The results are compared with each other and it is found that the control system designed by QFT shows a robust performance and can suppress the unevenness of output against parametric uncertainty.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2009-01
43巻
開始ページ 39
終了ページ 48
ISSN 1349-6115
言語 英語
論文のバージョン publisher
NAID 120002308875
JaLCDOI 10.18926/14063
フルテキストURL Mem_Fac_Eng_OU_42_71.pdf
著者 Kawase, Koichi| 小西 正躬| 今井 純|
抄録 In this research, Fuzzy control theory is applied to the inventory control of the supply chain between multiple companies. The proposed control method deals with the amount of inventories expressing supply chain between multiple companies. Referring past demand and tardiness, inventory amounts of raw materials are determined by Fuzzy inference. The method that an appropriate inventory control becomes possible optimizing fuzzy control gain by using SA method for Fuzzy control. The variation of uncertain demand is given to the proposal method. Furthermore, the method of forecasting demand and the effectiveness of fuzzy control method are confirmed by numerical experiments. As the results, the proposal method suppressed increase in an unnecessary cost when demand varies.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2008-01
42巻
1号
開始ページ 71
終了ページ 78
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002308296
JaLCDOI 10.18926/14065
フルテキストURL Mem_Fac_Eng_OU_42_91.pdf
著者 Ryohei, Hamana| 小西 正躬| 今井 純|
抄録 Various kind of productions are made in semiconductor fabrications, where it employs the production system with multiprocesses and multiple Automated Guided Vehicles(AGVs) for transportation. It is difficult to optimize planning of production and transportation simultaneously because of the complicated flow of semifinished products. This paper describes the formulations of production scheduling, transportation routing and sequence planning of material handling system, and algorithm for simultaneous optimization of plannings by using solution space reduction and simulated annealing method. In this paper, all production system is decomposed to the production scheduling problem, transportation routing problem by AGVs and sequence planning of material handling system with managing stockers and buffers. Production scheduling problem and transportation routing problem are solved by the optimization algorithm using the decomposition routing problem. Sequence planning of material handling robot problem is solved by the algorithm using simulated annealing method.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2008-01
42巻
1号
開始ページ 91
終了ページ 103
ISSN 0475-0071
言語 日本語
論文のバージョン publisher
NAID 120002308279
JaLCDOI 10.18926/14062
フルテキストURL Mem_Fac_Eng_OU_42_60.pdf
著者 Kikuchi, Junji| 小西 正躬| 今井 純|
抄録 In steel works, molten metals discharged from blast furnace are put into a pan for transportation called torpedo and transported to steel making factory by a locomotive. In molten metals transportation, it becomes issues to prevent temperature drop of molten metals for stable production of down stream plants to shorten transportation time. Therefore it is necessary to make an appropriate plan for molten metals transfer considering the production and the transportation simultaneously. In this paper, molten metals transfer planning method is proposed including production scheduling. That is, torpedo schedule, transfer request assignment and route plan of locomotives are optimized according to each objective.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2008-01
42巻
1号
開始ページ 60
終了ページ 70
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002308612
JaLCDOI 10.18926/14064
フルテキストURL Mem_Fac_Eng_OU_42_79.pdf
著者 Notsu Tadafumi| 小西 正躬| 今井 純|
抄録 The operations of a reactor furnace such as a blast furnace still depend on the experiences and intuitions of skilled operators due to the complexity of internal furnace phenomena and high temperature. There is a great demand for stable operations under the circumstances of a decrease in the number of skilled operators and difficulty in technology inheritance. This paper aims to construct mathematical description for control of a reactor furnace. Further, the linear-quadratic-gaussian control system for a reactor furnace is proposed, which estimates inner furnace temperature distribution using measured data near furnace wall. Temperature distribution of a furnace is controlled based on the estimated inner temperature distribution changing of boundary conditions of a furnace. The practicability of the proposed control method was checked through numerical experiments.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2008-01
42巻
1号
開始ページ 79
終了ページ 90
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002308624
JaLCDOI 10.18926/14081
フルテキストURL Mem_Fac_Eng_OU_41_1_20.pdf
著者 今村 拓司| 小西 正躬| 今井 純|
抄録 In this paper, we propose a simultaneous optimization method for inventory control and production planning problem for a chemical batch plant. The plant consists of blending process, intermediate storage tanks and filling process. In the proposed method, the original problem is decomposed into production planning sub-problem and inventory control sub-problem. Then the decision variables are optimized by alternately solving each sub-problem. The solution of the proposed method is compared with that of centralized optimization method. The effectiveness of the proposed method is investigated from numerical computational results.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2007-01
41巻
1号
開始ページ 20
終了ページ 30
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002308626
JaLCDOI 10.18926/14083
フルテキストURL Mem_Fac_Eng_OU_41_1_44.pdf
著者 前野 良太| 小西 正躬| 今井 純|
抄録 Petri net model is a frequently-used versatile tool which can represent a widely discrete event system. However, when the scale of the system becomes large, the calculation time for solving optimal problem (optimal firing sequence problem) is markedly increased. In this paper, we propose an approximation method that achieves the efficiency improvement of the solution by decomposing the Petri net for solving the optimal firing sequence problem. A timed Petri Net is decomposed into several subnets in which the optimal firing sequence for each subnet is solved by Dijkstra’s algorithm in polynomial computational complexity. The effectivity of the proposed method is verified by numerical experiments for the flowshop schedule problem.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2007-01
41巻
1号
開始ページ 44
終了ページ 51
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002308128
JaLCDOI 10.18926/14082
フルテキストURL Mem_Fac_Eng_OU_41_1_31.pdf
著者 濱名 良平| 小西 正躬| 今井 純|
抄録 Various kind of productions are made in semiconductor factories, where it employs the production system with multiprocess and multiple Automated Guided Vehicles(AGVs) for transportation. It is difficult to optimize planning of production and transportation simultaneously because of the complicated flow of semifinished products. This paper describes the formulations of production scheduling and transportation routing, and algorithm for simultaneous optimization of plannings by using logic cuts. The entire problem is decomposed to the master problem and the sub problem. If it derives the infeasible solutions, new constraints are added to the master problem to eliminate the solution area including infeasible solutions. The results of about optimality and computation time by using CPLEX solver are shown compared with conventional decomposition method to check up effectivity of proposed method in small size problem, and about optimality and computaion time for large scale problem.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2007-01
41巻
1号
開始ページ 31
終了ページ 43
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002308108
JaLCDOI 10.18926/14099
フルテキストURL Mem_Fac_Eng_OU_40_1_23.pdf
著者 菊池 純二| 小西 正躬| 西 竜志| 今井 純|
抄録 In steel works, iron ores are stored in ore yard and sent to various plants of down stream accoding to transfer requests. To attain stable operation, it is neccesary to keep a certain allowable stock level in ore tanks of all plants. To this purpose, ore transfer routing method has been developed based on decentralized agent method. In case of disaster such as a big earthquake or a big fire, damages in the facilities of industrial complex may be unavoidable. In this paper, decentralized optimization method is tested to cope with such emergencies. Decentralized agents corresponding to kind of ore make their own transfer route plan exchanging information with others. As the application of the proposed method, transfer scheduling in ore yard in steel works are made in case of destruction of transfer facilities.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2006-01
40巻
1号
開始ページ 23
終了ページ 30
ISSN 0475-0071
言語 英語
論文のバージョン publisher
NAID 120002308160