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. 18 (2005), No. 11

  • Sliding Mode Control for Descriptor Systems

    Takashi MIYAZAKI, Shigeyuki HOSOE

    pp. 377-385

    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.18.377

    Abstract

    In this paper we consider sliding mode control for descriptor systems. We propose a control input that bring and constrain the trajectory to a switching hyper plane and a design method of the hyper plane. We reduce this design problem to a stabilizing problem of a descriptor system. This stabilizing problem is solved by a generalized algebraic Riccati equation that has a kind of optimality. We also provide a computation method by considering a generalized eigenvalue problem

  • An Application of Lagrangian Relaxation Method to the Piston Delivery Scheduling Problem with Time-Windows

    Tatsuya KOBAYASHI, Kazumiti NUMATA

    pp. 386-392

    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.18.386

    Abstract

    In this paper we address a piston delivery scheduling problem with time-window constraints. The feature of this problem is a piston delivery. In a piston delivery, total running cost (length) to deliver products to all customers doesn't change even if we use a lot of or a few trucks. But the number of trucks necessary to satisfy time-window constraints is varied by the delivery timing. One of main factors of the delivery cost is the number of trucks to be secured. The minimum (or near minimum) number of trucks necessary for a given delivery request is a matter of interest. We propose a new solution method using Lagrangian relaxation for this problem. Numerical experiments show that the proposed method produces solutions with 25-20% less trucks than those by simple heuristics.

  • An Algorithm for the Spectral Factorization of Unimodular Para-Hermitian Polynomial Matrices in Continuous Time

    Osamu KANEKO, Paolo RAPISARDA, Kiyotsugu TAKABA

    pp. 393-399

    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.18.393

    Abstract

    In this paper, we address an algorithm for the spectral factorization of para-Hermitian unimodular polynomial matrices in the continuous time case. Most of the algorithms for the spectral factorizations of matrix polynomials depend on the existence of the roots of given polynomial matrices, so it is almost impossible to execute the spectral factorization of unimodular polynomial matrices. In this paper, we provide a new algorithm for the spectral factorization of unimodular polynomial matrices without the existence of the roots of polynomial matrices or the stability. The task one has to do is only to solve a linear matrix inequality consisting of the coefficients of a given unimodular matrix, which can be achieved easily by the use of numerical computation packages. The algorithm we present here is based on the property of the storage functions for the dissipative systems in which there always exists positive dissipated energy for the environment. This implies that the fundamental property in our algorithm is also a self-standing interesting result with respect to theoretical points of view. Finally, in order to show the validity of our results, we give an illustrative example with respect to numerical aspects.

  • A New Parameter Tuning for Controllers Based on Least-Squares Method by using One-Shot Closed Loop Experimental Data

    Osamu KANEKO, Kyoko YOSHIDA, Kazuyuki MATSUMOTO, Takao FUJII

    pp. 400-409

    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.18.400

    Abstract

    Recently, for the purpose of the minimization of the squared error between the desired and real experimental output of the plant, Iterative Feedback Tuning (IFT), Virtual Reference Feedback Tuning (VRFT), and Fictitous Reference Iterative Tuning (FRIT) were proposed as reasonable methods for tuning of the parameters of controllers. The first one requires many experiments for the updating step in Gauss-Newton method, while the later two methods requires only one-shot experimental data. Moreover, VRFT and FRIT have useful features in a complementary manner. From these backgrounds, this paper provides a new parameter tuning for controllers based on least-squares optimization by using one-shot closed loop experimental data. Here, we provide a basic idea of this approach and discuss the optimality of the obtained parameter. Moreover, we introduce the pre-filter so as to guarantee that the optimized parameter in the fictitious area corresponds to that in the real area. We also provide the algorithm of our method for enhancement of the use of this procedure. Finally we give an experimental example to illustrate the validity of our results.

  • Prediction of Linear Time-varying Stochastic Systems based on the Subspace Identification Method and its Recursive Algorithm

    Kentaro KAMEYAMA, Akira OHSUMI

    pp. 410-419

    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.18.410

    Abstract

    In this paper, a prediction method is newly proposed for time-varying stochastic linear systems in the subspace identification framework. The key to this subspace-based prediction is to regard the change of the extended observability matrix yielded by the time-varying parameters of system as the rotation of the principal vectors that span the basis of the signal subspace. The rotation rate is evaluated from the angle between the past and current signal subspaces, and the future signal subspace is predicted by rotating the current subspace. A recursive algorithm is derived and its efficacy is tested by simulation experiments.

  • A Fast Wave-Shape Matching Method for Identifying a Transceiver

    Takafumi NAGANO, Takashi IWAMOTO

    pp. 420-422

    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.18.420

  • © 2005 THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE)

Article Access Ranking

19 Jan. (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. In situ Observation of Reduction Behavior of Multicomponent Calcium Ferrites by XRD and XAFS Tetsu-to-Hagané Advance Publication
  3. In-Situ Observation Experimental Study on the Agglomeration and Dispersion of Particles at the Interface of High-temperature Melts ISIJ International Advance Publication
  4. Preface to the Diamond Jubilee Issue on “Selected Topics in Iron and Steel and Their Processing toward the New Steel Age” ISIJ International Vol.60(2020), No.12
  5. Improved Hydrogen Embrittlement Resistance of Steel by Shot Peening and Subsequent Low-temperature Annealing ISIJ International Advance Publication
  6. Effects of Residual Stress on Hydrogen Embrittlement of a Stretch-Formed Tempered Martensitic Steel Sheet ISIJ International Advance Publication
  7. Development and Prospects of Refining Techniques in Steelmaking Process ISIJ International Vol.60(2020), No.12
  8. Review on the High-Temperature Thermophysical Properties of Continuous Casting Mold Fluxes for Highly Alloyed Steels Tetsu-to-Hagané Vol.107(2021), No.1
  9. Hydrogen Absorption Behavior and Absorbed Hydrogen Trapping Sites in Rolling Contact Fatigue ISIJ International Advance Publication
  10. Transformation from Ferrite to Austenite during/after Solidification in Peritectic Steel Systems: an X-ray Imaging Study ISIJ International Vol.60(2020), No.12

Search Phrase Ranking

19 Jan. (Last 30 Days)

  1. blast furnace
  2. 西山記念技術講座
  3. blast furnace permeability
  4. blast furnace productivity
  5. j. f. elliott
  6. blast furnace burden distribution
  7. bottom dross
  8. carbon-containing pellet
  9. cog blast furnace injection
  10. cr2o3 al2o3