| FullText URL | fulltext.pdf |
|---|---|
| Author | Tsunata, Ren| Takemoto, Masatsugu| Imai, Jun| Saito, Tatsuya| Ueno, Tomoyuki| |
| Keywords | 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 |
| Published Date | 2023-10-04 |
| Publication Title | IEEE Access |
| Volume | volume11 |
| Publisher | Institute of Electrical and Electronics Engineers |
| Start Page | 109435 |
| End Page | 109447 |
| ISSN | 2169-3536 |
| Content Type | Journal Article |
| language | English |
| OAI-PMH Set | 岡山大学 |
| Copyright Holders | © 2023 The Authors. |
| File Version | publisher |
| DOI | 10.1109/ACCESS.2023.3321829 |
| Web of Science KeyUT | 001086321100001 |
| Related Url | isVersionOf https://doi.org/10.1109/ACCESS.2023.3321829 |
| FullText URL | fulltext.pdf |
|---|---|
| Author | Tsunata, Ren| Yokomichi, Keito| Takemoto, Masatsugu| Imai, Jun| |
| Keywords | Variable flux memory motor hybrid excitation motor traction applications EV HEV six-step operation one-pulse drive output power density |
| Published Date | 2023-08-03 |
| Publication Title | IEEE Access |
| Volume | volume11 |
| Publisher | Institute of Electrical and Electronics Engineers |
| Start Page | 82024 |
| End Page | 82036 |
| ISSN | 2169-3536 |
| Content Type | Journal Article |
| language | English |
| OAI-PMH Set | 岡山大学 |
| File Version | publisher |
| DOI | 10.1109/ACCESS.2023.3301809 |
| Web of Science KeyUT | 001047221300001 |
| Related Url | isVersionOf https://doi.org/10.1109/ACCESS.2023.3301809 |
| Author | Tsunata, Ren| Takemoto, Masatsugu| Imai, Jun| Saito, Tatsuya| Ueno, Tomoyuki| |
|---|---|
| Keywords | Aspect ratio axial-flux machine axial-gap motor cooling high efficiency mass production PMSM radial-flux machine soft magnetic composite thermal characteristic |
| Note | © 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.| |
| Published Date | 2023-03-13 |
| Publication Title | IEEE Transactions on Industry Applications |
| Volume | volume59 |
| Issue | issue3 |
| Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
| Start Page | 3353 |
| End Page | 3367 |
| ISSN | 0093-9994 |
| NCID | AA00667900 |
| Content Type | Journal Article |
| language | English |
| OAI-PMH Set | 岡山大学 |
| Copyright Holders | © 2023 IEEE. |
| File Version | author |
| DOI | 10.1109/tia.2023.3255845 |
| Web of Science KeyUT | 001061319100099 |
| Related Url | isVersionOf https://doi.org/10.1109/tia.2023.3255845 |
| FullText URL | IFAC_49_8_7.pdf |
|---|---|
| Author | Imai, Jun| Noso, Katsuyuki| Takahashi, Akiko| Funabiki, Shigeyuki| |
| Keywords | Distributed parameter systems Method of weighted residuals Boundary conditions Reduced-order models |
| Note | This is an Accepted Manuscript of an article published by Elsevier| |
| Published Date | 2016-08-09 |
| Publication Title | IFAC-Papers OnLine |
| Volume | volume49 |
| Issue | issue8 |
| Publisher | Elsevier |
| Start Page | 7 |
| End Page | 12 |
| ISSN | 2405-8963 |
| Content Type | Journal Article |
| language | Japanese |
| OAI-PMH Set | 岡山大学 |
| Copyright Holders | https://creativecommons.org/licenses/by-nc-nd/4.0/deed.ja |
| File Version | author |
| DOI | 10.1016/j.ifacol.2016.07.410 |
| Web of Science KeyUT | 000381505200003 |
| Related Url | https://doi.org/10.1016/j.ifacol.2016.07.410 |
| Author | Konishi, Masami| Nakano, Koichi| Imai, Jun| |
|---|---|
| Published Date | 2011-06-01 |
| Publication Title | 鉄と鋼 |
| Volume | volume97 |
| Issue | issue6 |
| Content Type | Journal Article |
| JaLCDOI | 10.18926/44495 |
|---|---|
| FullText URL | mfe_045_001_014.pdf |
| Author | Akiyoshi, Tatsuro| Imai, Jun| Konishi, Masami| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2011-01 |
| Volume | volume45 |
| Start Page | 1 |
| End Page | 14 |
| ISSN | 1349-6115 |
| language | English |
| Copyright Holders | Copyright © by the authors |
| File Version | publisher |
| NAID | 120002905951 |
| Author | Takenaga, Hiroki| Konishi, Masami| Imai, Jun| |
|---|---|
| Published Date | 2009-11-11 |
| Publication Title | Proceedings : Fifth International Workshop on Computational Intelligence & Applications |
| Volume | volume2009 |
| Issue | issue1 |
| Content Type | Conference Paper |
| JaLCDOI | 10.18926/17835 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_43_32.pdf |
| Author | Mabuchi, Shuji| Konishi, Masami| Imai, Jun| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2009-01 |
| Volume | volume43 |
| Start Page | 32 |
| End Page | 38 |
| ISSN | 1349-6115 |
| language | English |
| File Version | publisher |
| NAID | 120002308736 |
| JaLCDOI | 10.18926/17844 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_43_75.pdf |
| Author | Ohe, Keita| Konishi, Masami| Imai, Jun| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2009-01 |
| Volume | volume43 |
| Start Page | 75 |
| End Page | 92 |
| ISSN | 1349-6115 |
| language | English |
| File Version | publisher |
| NAID | 120002308900 |
| JaLCDOI | 10.18926/17841 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_43_55.pdf |
| Author | Inoue, Shinichiro| Konishi, Masami| Imai, Jun| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2009-01 |
| Volume | volume43 |
| Start Page | 55 |
| End Page | 60 |
| ISSN | 1349-6115 |
| language | English |
| File Version | publisher |
| NAID | 120002308973 |
| JaLCDOI | 10.18926/17839 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_43_49.pdf |
| Author | Akamatsu, Shinya| Konishi, Masami| Imai, Jun| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2009-01 |
| Volume | volume43 |
| Start Page | 49 |
| End Page | 54 |
| ISSN | 1349-6115 |
| language | English |
| File Version | publisher |
| NAID | 120002308854 |
| JaLCDOI | 10.18926/17837 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_43_39.pdf |
| Author | Kuwashima, Takayuki| Imai, Jun| Konishi, Masami| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2009-01 |
| Volume | volume43 |
| Start Page | 39 |
| End Page | 48 |
| ISSN | 1349-6115 |
| language | English |
| File Version | publisher |
| NAID | 120002308875 |
| JaLCDOI | 10.18926/14063 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_42_71.pdf |
| Author | Kawase, Koichi| Konishi, Masami| Imai, Jun| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2008-01 |
| Volume | volume42 |
| Issue | issue1 |
| Start Page | 71 |
| End Page | 78 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002308296 |
| JaLCDOI | 10.18926/14065 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_42_91.pdf |
| Author | Ryohei, Hamana| Konishi, Masami| Imai, Jun| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2008-01 |
| Volume | volume42 |
| Issue | issue1 |
| Start Page | 91 |
| End Page | 103 |
| ISSN | 0475-0071 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002308279 |
| JaLCDOI | 10.18926/14062 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_42_60.pdf |
| Author | Kikuchi, Junji| Konishi, Masami| Imai, Jun| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2008-01 |
| Volume | volume42 |
| Issue | issue1 |
| Start Page | 60 |
| End Page | 70 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002308612 |
| JaLCDOI | 10.18926/14064 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_42_79.pdf |
| Author | Notsu Tadafumi| Konishi, Masami| Imai, Jun| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2008-01 |
| Volume | volume42 |
| Issue | issue1 |
| Start Page | 79 |
| End Page | 90 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002308624 |
| JaLCDOI | 10.18926/14081 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_41_1_20.pdf |
| Author | Imamura, Takuji| Konishi, Masami| Imai, Jun| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2007-01 |
| Volume | volume41 |
| Issue | issue1 |
| Start Page | 20 |
| End Page | 30 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002308626 |
| JaLCDOI | 10.18926/14083 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_41_1_44.pdf |
| Author | Maeno, Ryota| Konishi, Masami| Imai, Jun| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2007-01 |
| Volume | volume41 |
| Issue | issue1 |
| Start Page | 44 |
| End Page | 51 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002308128 |
| JaLCDOI | 10.18926/14082 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_41_1_31.pdf |
| Author | Hamana, Ryohei| Konishi, Masami| Imai, Jun| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2007-01 |
| Volume | volume41 |
| Issue | issue1 |
| Start Page | 31 |
| End Page | 43 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002308108 |
| JaLCDOI | 10.18926/14099 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_40_1_23.pdf |
| Author | Kikuchi, Junji| Konishi, Masami| Nishi, Tatsushi| Imai, Jun| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2006-01 |
| Volume | volume40 |
| Issue | issue1 |
| Start Page | 23 |
| End Page | 30 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002308160 |
