Transactions of the Institute of Systems, Control and Information Engineers
New Arrival Alert : OFF

You can use this feature after you logged into the site.
Please click the button below.

Log in / Sign up
ONLINE ISSN: 2185-811X
PRINT ISSN: 1342-5668

Transactions of the Institute of Systems, Control and Information Engineers Vol. 4 (1991), No. 9

  • Width Control System for Hot Strip Mills Based on Multivariable Control

    pp. 347-359

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.5687/iscie.4.347

    To attain a successful width control for hot strip mill, it is important to control a width at each stand preventing excessive tension imbalance for some specified stands.
    Our research goal is to develop a multivariable control algorithm for the new width control system. In the proposed algorithm, the width is controlled by modifying the inter-stands tension, which value is derived from the measured width and the on-line calculated width. An optimal control principle is applied and the tension balance can be maintained by tuning the weighting matrix in the performance index. The on-line control algorithm is designed such that the tension modification value can be obtained in short time, compared with the optimal regulator. This calculation is realized using a formula manipulating procedure and the control performance is same to that by the optimal regulator.
    The control system based on this algorithm has been applied to the hot strip mill and the width deviation can be remarkably reduced than before.
  • A Generalized Predictive Control for CARIMA Systems Using the State-Space Approach

    pp. 360-368

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.5687/iscie.4.360

    A generalized predictive control (GPC) which can be designed in a state-space framework is proposed for single-input/single-output CARIMA systems. It is first shown that, in designing the steady-state 1-step Kalman predictor by applying the innovation model, there are two ways depending on whether the output value of the plant is directly used or not ; one is called here “direct output method” and another is called “output deviation method”. When solving the 1-step predicted estimate of the original output, the latter method can be further classified into two approaches which differ in respect of the interpretation of the predicted estimate for the output deviation. Thus, three different j-step ahead state-space output predictors can be designed for the GPC strategy. Finally, the performances of three GPCs are compared through some numerical simulations.
  • On Learning Algorithms for Neural Networks with Feedback Connections

    pp. 369-374

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.5687/iscie.4.369

    This paper presents a learning algorithm for neural networks having general feedback connections. Simulation results are presented to compare the algorithm with the existing backpropagation algorithm; the former is shown to have a greater capability in realizing complex tasks.
  • On-Line Scheduling of Flexible Manufacturing Systems Using Rule Base

    pp. 375-381

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.5687/iscie.4.375

    This paper deals with rule-based on-line scheduling of Flexible Manufacturing Systems (FMS). Operations research methods and simulation methods, which have been often used in off-line scheduling, cannot be applied to on-line scheduling, because of the computational complexity. To cope with this difficulty, we propose to apply a rule base to resolve the conflicts arised in machine tools or transports. To generate and evaluate the rule base for on-line schedulings, we construct an FMS simulation system to describe stochastic behavior, such as failures of machine tools, repair time and variations of processing times using hierarchical stochastic Petri nets. By using the FMS simulation system, we construct and evaluate the rule base for on-line scheduling.
  • Modality Constrained Programming Problems Introduced Gödel Implication and Various Fuzzy Mathematical Programming Problems

    pp. 382-392

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.5687/iscie.4.382

    The modality constrained programming (MCP) problem is previously proposed as the base model for unifying various fuzzy mathematical programming (FMP) problems. The relationships between MCP problems and six kinds of FMP problems have been discussed. However, some FMP problems, such as robust programming problem, FMP problem using fuzzy max, etc., did not have the relationships to MCP problems.
    In this paper, introducing the Gödel implication into modality measures, a fuzzy relation between elements is extended to eight kinds of relations between possibility distributions. MCP problems are reformulated using these eight kinds of relations. The relationships between reformulated MCP problems and four kinds of FMP problems, i. e., robust programming problem, FMP problem using fuzzy max, FMP problem proposed by Luhandjula and modality goal programming problem, are investigated. Itis emphasized that most of FMP problems are interpreted in the framework of MCP problems and formulated based on the modal concept.

Article Access Ranking

19 Jan. (Last 30 Days)

  1. Improving Blast Furnace Raceway Blockage Detection. Part 1: Classification of Blockage Events and Processing Framework ISIJ International Advance Publication
  2. A Review of the Chemistry, Structure and Formation Conditions of Silico-Ferrite of Calcium and Aluminum (‘SFCA’) Phases ISIJ International Vol.58(2018), No.12
  3. Hydrogen Embrittlement Susceptibility Evaluation of Tempered Martensitic Steels Showing Different Fracture Surface Morphologies Tetsu-to-Hagané Vol.105(2019), No.1
  4. Heat Transfer Characteristic of Slit Nozzle Impingement on High-temperature Plate Surface ISIJ International Advance Publication
  5. Fusion Zone Microstructural Evolution of Al-10% Si Coated Hot Stamping Steel during Laser Welding ISIJ International Vol.59(2019), No.1
  6. Effect of Annealing Time on Oxides Phases and Morphology along Oxidized Depth of Fe-3%Si Steel during Decarburization ISIJ International Vol.59(2019), No.1
  7. Improving Blast Furnace Raceway Blockage Detection. Part 2: Signal Processing of Hot Blast Pressure Data ISIJ International Advance Publication
  8. Effects of Sulfur and Titanium Interaction in Molten Pig Iron on Erosion of Carbon Brick ISIJ International Vol.59(2019), No.1
  9. Numerical Simulation of Decarburization Kinetics for Fe-3%Si Steel during Annealing ISIJ International Advance Publication
  10. Improving Blast Furnace Raceway Blockage Detection. Part 3: Visual Detection Based on Tuyere Camera Images ISIJ International Advance Publication

Search Phrase Ranking

19 Jan. (Last 30 Days)

  1. blast furnace
  2. blast furnace productivity
  3. blast furnace permeability
  4. 鉄と鋼
  5. laser welder
  6. titanium
  7. activity feo
  8. argon steel
  9. continous annealing
  10. eaf operation