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. 2

  • A Dynamic Scheduling Method for Painting Process with JIT Production System

    pp. 65-71

    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.13.65

    Scheduling method have been investigated for Just-In-Time (JIT) production systems with painting process that has longer lead time than the planning period of assemble line, followed by the painting prosess. In such JIT production systems, it is difficult to keep stable production between painting process and assemble line.Therefore, it is necessary that painting process has independent production schedule forecasted on the processing requirement jobs of assemble line. However, when multi-volume production is done or defective jobs occur in painting process, production balance between painting process and assemble line is destroyed, and then delays of due dates often occurred. To cope with this difficulty, we propose a scheduling method based on heuristic algorithm for painting process in the JIT production system in order to prevent delays of due date and to keep the smallest inventory in buffer of painting process. We have evaluated the scheduling method by computer simulation.
  • Bias-Compensated Least-Squares Estimation and Parameter Transformation in Identification with Over-Parameterized Models

    pp. 72-79

    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.13.72

    For the problem of estimating unknown parameters of the transfer function model from input and output (I/O) data contaminated by colored measurement noise, a three-step estimation procedure has been previously proposed to exploit the I/O correlation information with respect to the correlation time. This paper analyzes this procedure from the compatibility between the parameter transformation and the bias-compensated least-squares (BCLS) estimation used in the third step. The transformation is made from the over-parameterized model in the first and second steps to the final model with the true order in the final step, and is based on the minimization of the mean square error (MSE) between the outputs of the two models. The BCLS estimation is based on the minimization of MSE between the final model output and the process output. It is verified that the condition for compatibility, i.e. the equivalence of two minimizations, is a consequence of the two over-parameterized estimation equations in the first two steps, and that the over-parameterization assures an inclusive expansion of the I/O correlation information. Simulation results are presented to demonstrate the equivalence.
  • Dead-Beat Optimal Tracking Control in Input-Output Data Space

    pp. 80-86

    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.13.80

    The system representation in the input-output data space, which was proposed recently, leads to a new control strategy for a linear time-invariant plant. The control input is computed directly from the input-output data of the plant without using any traditional mathematical model, such as transfer function or state space equation. This paper considers a dead-beat tracking problem for arbitrary reference signals in that framework, and presents the optimal control for a quadratic performance index
  • Improvement of Generalization Ability of a Fuzzy Classifier with Ellipsoidal Regions by the Optimum Division of Data

    pp. 87-94

    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.13.87

    In this paper, we discuss methods for improving the generalization ability of a fuzzy classifier with ellipsoidal regions. In the fuzzy classifier, each cluster is approximated by a center and a covariance matrix, and the membership function is calculated using the inverse of the covariance matrix. Thus when the number of training data is small, the covariance matrix becomes singular and the generalization ability decreases. In addition, when the characteristics of the training and test data differ, the generalization ability decreases. In this paper, we improve the generalization ability controlling the number of singular values in the covariance matrix. Then we propose to divide the sampled data set into training and test data sets so that the centers and the covariance matrices of each class become similar. Finally, we demonstrate the validity of our methods by computer simulations.
  • A Design Method for a Multivariable Generalized Predictive Control with a Terminal Matching Condition in a State-space Approach

    pp. 95-102

    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.13.95

    In this paper, the generalized predictive control (GPC) with a terminal matching condition for single-input single-output (SISO) plants proposed by Kwok and Shah [6] is extended so that it can be applied to multi-input multi-output (MIMO) plants. For the extension to MIMO case, a state-space approach is used in the proposed method while a polynomial approach is used in the conventional method. This is because a state-space approach for the design of the proposed GPC makes the extension to MIMO case possible. In addition, a steady-state predictor originally derived in this paper using a state-space approach is shown to be completely equivalent to that in the conventional method when SISO plant is designed. Finally, a numerical example is demonstrated to show that a terminal matching condition in the MIMO case has the same role for improving performances of the controlled system as in the SISO case using conventional method.
  • Two-Step Design Method for Strictly Positive Real H2 Controllers

    pp. 103-109

    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.13.103

    This paper proposes an interesting technique for LMI-based multiobjective control design. We deal with strictly positive real H2 controller synthesis. If we partially fix both LMI solutions and controllers in the first step, a set of jointly convex LMI formula is obtained in the second step. The first step restricts the range of the parameter set to some degree, and the second step searches within these boundaries. However, if these constraints include the standard result for a common LMI solution, then the second step may improve this result while allowing uncommon LMI solutions. A numerical example is included.

Article Access Ranking

17 May. (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. Preface to the Special Issue on “Toward Suppression of Hydrogen Absorption and Hydrogen Embrittlement for Steels” ISIJ International Vol.61(2021), No.4
  3. Steam Reforming of Methane on Sponge Iron: Influence of Gas Composition on Reaction Rate ISIJ International Vol.61(2020), No.1
  4. A Visualization Method of Quantifying Carbon Combustion Energy in the Sintering Packed Bed ISIJ International Advance Publication
  5. Reaction Behaviors of Various Agglomerates in Reducing the Temperature of the Thermal Reserve Zone of the Blast Furnace Tetsu-to-Hagané Vol.107(2021), No.5
  6. Automatic Ultrasonic Testing of Non-metallic Inclusions Detectable with Size of Several Tens of Micrometers Using a Double Probe Technique along the Longitudinal Axis of a Small-diameter Bar ISIJ International Vol.61(2020), No.1
  7. Reaction Behaviors of Mixed Burdens Consisting of Pellets and Sintered Ores in an Experimental Blast Furnace Tetsu-to-Hagané Vol.107(2021), No.5
  8. Decarburizing Behavior and Its Effect on Mechanical Properties of Ultrahigh Strength Steel Sheets ISIJ International Vol.61(2021), No.4
  9. Comprehensive Research about Critical Interaction Region Named Cohesive Zone in Series of Dissected Blast Furnaces: A Review ISIJ International Advance Publication
  10. Review of Positron Lifetime Studies of Lattice Defects Formed during Tensile Deformation in a Hydrogen Environment ISIJ International Vol.61(2021), No.4

Search Phrase Ranking

17 May. (Last 30 Days)

  1. blast furnace
  2. activities in the liquid solution sio2-cao- mgo-al2o3 at 1600℃
  3. blast furnace permeability
  4. slag
  5. activity coefficient of ti in liquid iron
  6. blast furnace productivity
  7. coke oven gas injection
  8. desulfurization kr
  9. development and prospects of refining techniques in steelmaking process
  10. fe23cb6