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. 2

  • Identification of Continuous-Time Wiener-Type Nonlinear Model via a Subspace Method

    pp. 43-50

    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.18.43

    This paper is concerned with identification of continuous-time Wiener-type nonlinear model. A subspace method is applied to identify the linear dynamic element represented by δ-operator model transformed through Laguerre filters. The nonlinear part is estimated via least-squares approximation. Numerical simulation results are provided to illustrate the proposed identification method.
  • Control Designs for Suppressing Oscillations of the RTAC System

    pp. 51-61

    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.18.51

    The problem of controlling the RTAC (Rotational/Translational Actuator) system provides a benchmark for evaluting various nonlinear control design techniques. The RTAC system, which represents a translational oscillator with an eccentric rotational proof-mass actuator, was originally studied as a simplified model of a dual-spin spacecraft to investigate the resonance capture phenomenon. This paper presents design methods of a controller that supresses oscillations of the RTAC system. The controller gives a dual-mode control that consists of an energy-based control that can effectively suppress the oscillations of the bed, and a stabilizing control that makes the whole system globally and asymptotically stable. The energy-based control is taken over by the stabilizing control when the oscillations of the bed become small to some extent. Two types of energy-based control law are proposed : one rotates the disk in normal and reverse rotation in a limited angular amplitude and the other rotates the disk in one direction. It is shown that the proposed controller achieves a performance comparable with that of the time optimal controller. Simulation experiments also show the effectiveness of the proposed methods.
  • An Algorithm of J Spectral Factorization for Discrete Time Polynomial Matrices

    pp. 62-69

    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.18.62

    This paper addresses an algorithm of J spectral factorization for discrete time polynomial matrices. Particularly, we focus on the computation of J spectral factorization for discrete time polynomial matrices. Our approach is based on two-variable polynomial matrices, which is introduced for the analysis and synthesis of discrete time dissipativeness by authors, and algebraic Riccati equations. We show that the solvablity of J spectral factorization of a given polynomial matrix is equivalent to that of an algebraic Riccati equation consisting of the coefficient matrices of the given polynomial matrix. And then we provide an algorithm of discrete time J spectral factorization. Moreover, we give an illustrative example in order to show the validity of our results.
  • Stability Condition of Piecewise Linear Second-Order Systems via Eigenvalues and Eigenvectors

    pp. 70-79

    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.18.70

    This paper considers stability of piecewise linear second-order systems. We analyze the trajectory of the systems by using eigenvalues and eigenvectors of coefficient matrices of subsystems. For the case where the coefficient matrices have complex eigenvalues, we present the necessary and sufficient condition for the piecewise linear systems to be stable.

Article Access Ranking

15 Jul. (Last 30 Days)

  1. Production and Technology of Iron and Steel in Japan during 2019 ISIJ International Vol.60(2020), No.6
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Scheduling in Continuous Steelmaking Casting: A Systematic Review ISIJ International Vol.60(2020), No.6
  4. Numerical Simulation of Fluid Flow and Solidification in a Vertical Round Bloom Caster Using a Four-port SEN with Mold and Strand Electromagnetic Stirring ISIJ International Advance Publication
  5. Numerical Simulation for the Influence of EMS Position on Fluid Flow and Inclusion Removal in a Slab Continuous Casting Mold ISIJ International Vol.60(2020), No.6
  6. Experimental Evaluation of Texture Change during Grain Growth in Electrical Steel Sheets and Its Prediction by Phase Field Simulation Tetsu-to-Hagané Vol.106(2020), No.7
  7. From Iron Ore to Crude Steel: Mass Flows Associated with Lump, Pellet, Sinter and Scrap Iron Inputs ISIJ International Vol.60(2020), No.6
  8. Tension Leveling Using Finite Element Analysis with Different Constitutive Relations ISIJ International Vol.60(2020), No.6
  9. Deoxidation Equilibria of Fe–Mn–Al Melt with Al2O3 or MnAl2O4 at 1873 and 1773 K ISIJ International Advance Publication
  10. Taguchi Orthogonal Test on Granule Properties and Porosity Distribution in Sintering Bed using High-resolution X-ray Computed Tomography ISIJ International Vol.60(2020), No.6

Search Phrase Ranking

15 Jul. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. blast furnace productivity
  4. cao sio2 viscosity
  5. 17-7 ph
  6. hole expansion ratio
  7. big data
  8. cao
  9. cold formed bainitic steel
  10. digitalization