Steel Science Portal

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. 13 (2000), No. 9

  • Direct Design of a Model Following Anti-Windup Control System Based on Youla Parametrization

    Yasuyuki TOMIDA, Kiyotsugu TAKABA

    pp. 395-402

    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.13.9_395

    Abstract

    In this paper, we consider the anti-windup control system design based on Youla parametrization. We derive sufficient conditions for the stability and the model following performance of the present anti-windup control system in terms of scaled H∞ conditions. Furthermore, based on these conditions, we provide a direct design method of the anti-windup controller achieving the good model following performance even when the control input is saturated. A numerical example shows the applicability of the proposed design method.

  • A Design Method for Nonlinear H∞ Control Based on Hamilton-Jacobi-Isaacs Equation

    Joe IMAE, Junya TAKAHASHI

    pp. 403-412

    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.13.9_403

    Abstract

    Based on Hamilton-Jacobi-Isaacs equation, we deal with a design problem of the state feedback controller for the nonlinear H∞ control problem. Making use of the emergent property of Genetic Programming, we try to approximately obtain the solution of the Hamilton-Jacobi-Isaacs equation. By introducing the automatic differentiation technique, we then combine the Genetic Programming with the nonlinear H∞ control problem. Some numerical examples are demonstrated to illustrate the efficiency of the proposed design method.

  • A Sequencing Domain Shell for a Mixed-Model Assembly Line

    Osamu TAKATA, Kentaro OGUCHI, Tomohiko YAMAZAKI, Minoru FUJII, Toyohide WATANABE

    pp. 413-423

    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.13.9_413

    Abstract

    This paper proposes a sequencing domain shell for a mixed-model assembly line and also discusses the application result from a practical production of a bumper coating line. The domain shell, SELES (SELEction tool for production instruction Scheduling), was developed to construct sequencing expert systems individually and provided the functions to select an appropriate product from plural candidates with respect to constraints such as line situation and line balancing. The characteristics of SELES are as follows : (1) the meta-inference mechanism and knowledge representation enable to straightforwardly describe flows of sequencing and maintain easily knowledge bases, (2) the selection mechanism using filtering primitives is understandable and widely applicable for various kinds of production lines. We applied SELES to a sequencing system for a practical bumper coating line. As a result, we could reduce a mount of labors dramatically and decrease a stock space of products in some production processes.

  • Observer Based Partial Switching Control of Systems with State and Control Constraints

    Kenji HIRATA, Masayuki FUJITA

    pp. 424-432

    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.13.9_424

    Abstract

    This paper considers output-feedback switching control of systems with pointwise-in-time state and control constraints. In the case of full state feedback, the ability of switching control laws for resolving a common conflict in the design of state regulators has been proved. Under measurement feedback, previous work of the authors derived the switching control law utilizing a set-valued state estimation technique. However, the online computational burden in constructing the set-valued estimates of the plant state may severely limit its applicability. Proposed methods in this paper alleviate this burden. The main idea is to construct an upper bound of certain quadratic form of unmeasured error signals. The resulting measurement feedback switching control law is then constructed in conjunction with this upper bound as an estimation error, rather than set-valued estimate of the state.

  • A Robust Fuzzy Classifier with Ellipsoidal Regions

    Takashi EGUCHI, Hisashi TAMAKI, Shigeo ABE

    pp. 433-440

    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.13.9_433

    Abstract

    In this paper, we discuss a robust training method for a fuzzy classifier with ellipsoidal regions. First, we define a fuzzy rule for each class. Next, we determine the weight for each training datum Dy the two-stage method in order to suppress the effect of outliers. Then, using these weights, we calculate the center and covariance matrix of the ellipsoidal region for each class and tune the Fuzzy rules. After tuning, to further improve generalization ability, we tune fuzzy rules between two classes using the training data in the class boundary. We demonstrate the effectiveness of our method using four benchmark data sets.
  • © 2000 THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE)

Article Access Ranking

24 Oct. (Last 30 Days)

  1. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  2. Research and Application of Model and Control Strategies for Hot Rolled Strip Cooling Process Based on Ultra-Fast Cooling System ISIJ International Advance Publication
  3. Influences of Na2O, K2O and Li2O Additions on Electrical Conductivity of CaO–SiO2–(Al2O3) Melts ISIJ International Advance Publication
  4. Erosion of Carbon Brick by Zinc in Hearth of Blast Furnace ISIJ International Advance Publication
  5. Online Prediction of Hot Metal Temperature Using Transient Model and Moving Horizon Estimation ISIJ International Vol.59(2019), No.9
  6. Observation of Chemical State for Interstitial Solid Solution of Carbon in Low-carbon Steel by Soft X-ray Absorption Spectroscopy ISIJ International Advance Publication
  7. Influence of Selective Surface Oxidation of Si and Mn on Fe–Zn Alloying Reaction on Hot-rolled Steel Sheets ISIJ International Vol.59(2019), No.9
  8. Optimization of Thermal Soft Reduction on Continuous-Casting Billet ISIJ International Advance Publication
  9. Effects of Alloy Elements on Carbon Partitioning in Early Stages of Proeutectoid Ferrite Transformation in Low Carbon Mn–Si Steels ISIJ International Advance Publication
  10. Modeling of Surface Crack Defects Developed on Shear Edge in High-strength Automotive Steel Sheets ISIJ International Advance Publication

Search Phrase Ranking

24 Oct. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. blast furnace productivity
  4. heating furnace temperature control before rolling
  5. steel
  6. hole expanding test
  7. fe coating
  8. gene
  9. hearth roll
  10. hot rolling