| 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 |
| 巻 | 49巻 |
| 号 | 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 | Japanese |
| 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 |
| JaLCDOI | 10.18926/47023 |
|---|---|
| フルテキストURL | mfe_36_2_015_042.pdf |
| 著者 | Ohtani, Ryuji| Konishi, Masami| Imai, Jun| Nishi, Tatsushi| |
| 抄録 | In this paper, we studied a planning and scheduling of production system considering demand changes. In the proposed system, planning part determines lot-size and amount of jobs in production. On the other hand, scheduling part determines the production sequence of jobs. In order to treat with the demand changes, both planning and scheduling should work well simultaneously. In the proposed system, preset and real time production control system is newly constructed from the view point of adaptive control. In the system, production planning is modified when the difference between production amount and demand becomes large. Moreover, production schedule is regenerated when the determined schedule is deviated from the prospected one. The scheduling system is characterized as the autonomous decentralized optimization system where each job works as agent and agent searches its appropriate starting time of processing. The effectiveness of the proposed system is confirmed by numerical examples. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2002-03 |
| 巻 | 36巻 |
| 号 | 2号 |
| 開始ページ | 15 |
| 終了ページ | 42 |
| ISSN | 0475-0071 |
| 言語 | English |
| 論文のバージョン | publisher |
| NAID | 80015471209 |
| JaLCDOI | 10.18926/46967 |
|---|---|
| フルテキストURL | mfe_37_1_001_010.pdf |
| 著者 | Sotobayashi, Ken| Konishi, Masami| Nishi, Tatsushi| Imai, Jun| |
| 抄録 | Auto Guided Vehicles (AGVs) are widely used in a semi-conductor fabricating factory and contribute to the stable production of a high quality semi-conductor products. In the near future, further expansion of the transportation system is expected accompanied with the rapid growth of semi-conductor industries. In such situation, the necessity of performing quick planning of transportation route and transportation control will be elevated. In this paper, practicable planning of the transportation route and transportation control are studied based on the decentralized agent method. Especially, the geometrical sizes of AGVs are considered in the determination of transportation routes and control strategy avoiding the occurrence of mutual collisions or deadlock of AGVs. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2002-11 |
| 巻 | 37巻 |
| 号 | 1号 |
| 開始ページ | 1 |
| 終了ページ | 10 |
| ISSN | 0475-0071 |
| 言語 | English |
| 論文のバージョン | publisher |
| NAID | 120003457322 |
| 著者 | Imai, Jun| Ando, Yasuaki| 小西 正躬| |
|---|---|
| 発行日 | 2003-12 |
| 出版物タイトル | Decision and Control |
| 資料タイプ | 学術雑誌論文 |
| JaLCDOI | 10.18926/14146 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_39_1_21.pdf |
| 著者 | 鳥越 崇史| 小西 正躬| 今井 純| 西 竜志| |
| 抄録 | In this paper, neuro based intelligent diagnosis methods for electro-mechanical control system are proposed. A self organizing map neural network (SOM) is used to classify measured data of the target system as a qualitative diagnostic method. Besides of the above procedure, it is expected to attain more efficient maintenance by a quantitative estimation of failure. For the purpose, new method is proposed using a hierarchical neural network (HNN). In the method, classified results by SOM are processed for the quantitative diagnosis. Hierarchical neural network can identify inner structure of the relations between failure causes and its results that enables a quantitative diagnosis. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2005-01 |
| 巻 | 39巻 |
| 号 | 1号 |
| 開始ページ | 21 |
| 終了ページ | 27 |
| ISSN | 0475-0071 |
| 言語 | English |
| 論文のバージョン | publisher |
| NAID | 120002308342 |
| JaLCDOI | 10.18926/14148 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_39_1_28.pdf |
| 著者 | 石丸 和史| 小西 正躬| 今井 純| 西 竜志| |
| 抄録 | In reactor furnace, due to high temperature and high pressure, data can be measured only near the furnace wall. In this paper, the way to estimate temperature distribution in a reactor furnace using measured data near the furnace walls and to control temperature distribution to the desired temperature distribution was studied. In the estimation, SQP method is employed using measured data near the furnace walls. As the result, the whole temperature distribution in a furnace could be obtained from such limited data. Furthermore, to control the temperature distribution in a reactor furnace, gas flow from multiple tuyeres and supplying material for controlling temperature distribution in a reactor furnace were determined by the SQP method. It was shown that temperature distribution in a furnace was regulated to achieve various desired distribution. Thus, it was verified that complicated temperature distribution in a reactor furnace could be controlled by combining furnace simulation and SQP method. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2005-01 |
| 巻 | 39巻 |
| 号 | 1号 |
| 開始ページ | 28 |
| 終了ページ | 39 |
| ISSN | 0475-0071 |
| 言語 | English |
| 論文のバージョン | publisher |
| NAID | 120002308270 |
| JaLCDOI | 10.18926/46947 |
|---|---|
| フルテキストURL | mfe_38_1-2_005_014.pdf |
| 著者 | Ishimaru, Kazuhito| Konishi, Masami| Imai, Jun| Nishi, Tatsushi| |
| 抄録 | Temperature distribution in the reactor furnace is mainly operated by gas blowing from multiple tuyeres and material charge distribution. The objective of our research is obtain the optimal profile of gas flow to control temperature distribution in the reactor furnace in the shortest possible time. We formulated the optimization problem to reduce deviation of temperature distribution from its desired one in the reactor furnace. Based on the formulation, gas blow conditions are optimized by a sequential quadratic programming method to realize the desired temperature distribution. The validity of the method was checked through numerical experiments. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2004-03 |
| 巻 | 38巻 |
| 号 | 1-2号 |
| 開始ページ | 5 |
| 終了ページ | 14 |
| ISSN | 0475-0071 |
| 言語 | English |
| 論文のバージョン | publisher |
| NAID | 80016785933 |
| 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 |
| 巻 | 42巻 |
| 号 | 1号 |
| 開始ページ | 91 |
| 終了ページ | 103 |
| ISSN | 0475-0071 |
| 言語 | Japanese |
| 論文のバージョン | publisher |
| NAID | 120002308279 |
| 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 |
| 巻 | 41巻 |
| 号 | 1号 |
| 開始ページ | 44 |
| 終了ページ | 51 |
| ISSN | 0475-0071 |
| 言語 | English |
| 論文のバージョン | publisher |
| NAID | 120002308128 |
| JaLCDOI | 10.18926/15269 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_35_47.pdf |
| 著者 | 堂前 行宏| 小西 正躬| 今井 純| Asada, Hideki| Kitamura, Akira| |
| 抄録 | In this paper, an identification method of motor parameters for the diagnosis of rotor bar defects in the squirrel cage induction motor is proposed. It is difficult to distinguish the degree of deterioration by a conventional diagnostic method such as Fourier analysis. To overcome the difficulty, a motor simulator is used to identify the degree of deterioration of rotors in the squirrel cage induction motor. Using this method, the deterioration of rotor bars in the motor can be estimated quantitatively. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2001-03-27 |
| 巻 | 35巻 |
| 号 | 1-2号 |
| 開始ページ | 47 |
| 終了ページ | 51 |
| ISSN | 0475-0071 |
| 言語 | English |
| 論文のバージョン | publisher |
| NAID | 120002307181 |
| JaLCDOI | 10.18926/46948 |
|---|---|
| フルテキストURL | mfe_38_1-2_015_027.pdf |
| 著者 | Torigoe, Takashi| Konishi, Masami| Imai, Jun| Nishi, Tatsushi| |
| 抄録 | In these days, mechanical systems are becoming more complex and highly automated. So, there exist wide variety of demands for reliable diagnostic technology. A reliable data analysis and quantitative diagnosis method of mechanical system is necessary for the purpose. In this paper a quantitative diagnosis method for looper height control system has been developed based on neural network technologies. The wavelet transformation is used for pre-processing to analyze characteristics of looper height control system. And, self organizing map neural network is used for the purpose of classification based on the pre-processed data. After that, the classified results are used for quantitative diagnosis in hierarchical neural network. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2004-03 |
| 巻 | 38巻 |
| 号 | 1-2号 |
| 開始ページ | 15 |
| 終了ページ | 27 |
| ISSN | 0475-0071 |
| 言語 | English |
| 論文のバージョン | publisher |
| NAID | 80016785934 |
| JaLCDOI | 10.18926/46978 |
|---|---|
| フルテキストURL | mfe_37_2_029_044.pdf |
| 著者 | Imajo, Shuya| Konishi, Masami| Imai, Jun| Nishi, Tatsushi| |
| 抄録 | In hot strip rolling mills, the looper control system is automated. However, the looper's behavior tends to be unstable in threading. Therefore, human expert always intervenes and stabilizes the looper's behavior by tuning PID gains and interposing manipulation variable of looper control system. In this paper, we propose a method based on the recurrent neural network to express PID gains tuning action by human. Furthermore, we propose two methods to update the model by learning. To check the effectiveness of the proposed learning methods, numerical simulation applied to the looper height control is carried out. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2003-03 |
| 巻 | 37巻 |
| 号 | 2号 |
| 開始ページ | 29 |
| 終了ページ | 44 |
| ISSN | 0475-0071 |
| 言語 | English |
| 論文のバージョン | publisher |
| NAID | 80016037880 |
| 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 |
| 巻 | 43巻 |
| 開始ページ | 75 |
| 終了ページ | 92 |
| ISSN | 1349-6115 |
| 言語 | English |
| 論文のバージョン | publisher |
| NAID | 120002308900 |
| 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 |
| 巻 | 41巻 |
| 号 | 1号 |
| 開始ページ | 20 |
| 終了ページ | 30 |
| ISSN | 0475-0071 |
| 言語 | English |
| 論文のバージョン | publisher |
| NAID | 120002308626 |
| 著者 | Imai, Jun| |
|---|---|
| 発行日 | 2002-12 |
| 出版物タイトル | Decision and Control |
| 資料タイプ | 学術雑誌論文 |
| JaLCDOI | 10.18926/46998 |
|---|---|
| フルテキストURL | mfe_36_1_029_039.pdf |
| 著者 | Imai, Jun| Wada, Kiyoshi| |
| 抄録 | A procedure for control-oriented modeling is proposed for large flexible structures with unknown modal parameters. Techniques on quantification of errors in modal truncated nominal models are developed for the case where a finite number of upper and lower bounds of the unknown modal parameters are given. A feasible set of systems matching the conditions is introduced, and then error bounds covering the feasible set are established in the frequency domain. The bounds are easily checked using linear programming for any user-specified frequency. The feasibility of the proposed scheme is illustrated by numerical study on an ideal flexible beam example. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2001-12 |
| 巻 | 36巻 |
| 号 | 1号 |
| 開始ページ | 29 |
| 終了ページ | 39 |
| ISSN | 0475-0071 |
| 言語 | English |
| 論文のバージョン | publisher |
| NAID | 80012887118 |
| 著者 | Imai, Jun| |
|---|---|
| 発行日 | 2002-8 |
| 出版物タイトル | SICE 2002. Proceedings of the 41st SICE Annual Conference |
| 巻 | 3巻 |
| 資料タイプ | 学術雑誌論文 |
| フルテキストURL | fulltext.pdf |
|---|---|
| 著者 | Imai, Jun| Wada, Kiyoshi| |
| キーワード | error analysis flexible structures frequency-domain analysis linear programming modelling parameter estimation uncertain systems |
| 備考 | Print ISBN: 0-7803-6638-7| |
| 発行日 | 2000-12 |
| 出版物タイトル | Proceedings of the 39th IEEE Conference on Decision and Control |
| 巻 | 4巻 |
| 出版者 | IEEE |
| 開始ページ | 3780 |
| 終了ページ | 3784 |
| ISSN | 0191-2216 |
| NCID | BA51644536 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | English |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © 2000 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. |
| 論文のバージョン | publisher |
| DOI | 10.1109/CDC.2000.912298 |
| Web of Science KeyUT | 000172029000684 |
| 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 |
| 巻 | 45巻 |
| 開始ページ | 1 |
| 終了ページ | 14 |
| ISSN | 1349-6115 |
| 言語 | English |
| 著作権者 | Copyright © by the authors |
| 論文のバージョン | publisher |
| NAID | 120002905951 |
| 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 |
| 巻 | 42巻 |
| 号 | 1号 |
| 開始ページ | 71 |
| 終了ページ | 78 |
| ISSN | 0475-0071 |
| 言語 | English |
| 論文のバージョン | publisher |
| NAID | 120002308296 |