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. 32 (2019), No. 8

  • Effect of Zero-cost Interval in Running Cost for Stochastic Impulse Control Problems

    Ryosuke Naito, Kazuhiro Yasuda

    pp. 301-308

    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.32.301

    Abstract

    Effects of a zero-cost interval of a running cost on exercise boundaries in stochastic impulse control problems are considered. To study it, we basically use a numerical algorithm given in [1]. However, convergences of its numerical solutions to the true solution in their algorithm under our settings here are not theoretically guaranteed, therefore we first extend their theorems related to convergences and mathematically prove it. Then using the valid algorithm, relations between the zero-cost intervals and the value function or optimal strategies are numerically studied.

  • On the Worst Disturbance of Airplane Longitudinal Motion using the Generic Transport Model

    Kenji Sawada, Yoshiro Hamada, Hideki Fukunaga, Seiichi Shin

    pp. 309-317

    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.32.309

    Abstract

    In gust alleviation control synthesis, it is important how to generate the worst disturbance that has the worst effects on aviation. This paper applies the worst disturbance method based on H∞control to a linearized airplane motion model and provides new insights into the relationship between the initial condition and the worst disturbance. In addition, this paper utilizes Generic Transport Model (GTM) which is a nonlinear airplane motion model developed by NASA and discusses whether the linear model results are applicable for GTM. The first result is that the proposed worst disturbance algorithm allows us to analyze the relation between the initial conditions and short-period/Phugoid modes of longitudinal motion and especially tends to decrease the damping ration of the short period mode. The second result is to show that H∞control is applicable for GTM within the small perturbation around the trim condition and there are the same oscillation behaviors between the linear and nonlinear models.

  • Feedback Control of Vibration Generator's Load to Maintain the Vibrating Body's Oscillation Amplitude at a Reference Value

    Kazuki Nagai, Kiyora Saito, Chikashi Inada, Yasuhide Kobayashi

    pp. 318-326

    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.32.318

    Abstract

    This paper considers the problem of controlling a vibrating body's amplitude by varying the load of the vibration generator. We propose a feedback control system for a variable load whose command is the output signal of a proportional integral (PI) controller, which is driven by the deviation between the reference value and the estimated oscillation amplitude. The amplitude is estimated by using the absolute value function and a low-pass filter (LPF). An experiment is carried out with a mass-spring-damper system, which indicates the validity of the proposed method by showing that the closed-loop system becomes stable when PI gains (KP , KI) are appropriately chosen. Furthermore, this paper provides a theoretical guarantee of the closed-loop stability of the proposed system by assuming second- and forth-order plant models. The stability conditions are derived using linear approximation of the nonlinear system around the equilibrium point. The validity of the stability conditions are shown by numerical simulations. The stability condition is consistent with the experimental results: the boundary line on the KP −KI plane has a positive slope and a positive segment KI > 0 at KP =0.
  • © 2019 THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE)

Article Access Ranking

02 Feb. (Last 30 Days)

  1. 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(2021), No.1
  2. Effect of microstructure on mechanical properties of quenching & partitioning steel ISIJ International Advance Publication
  3. Role and Potential of Aluminium and Its Alloys for a Zero-Carbon Society MATERIALS TRANSACTIONS Vol.64(2023), No.2
  4. Preface to the Special Issue on “Advanced Carbon Utilization Technologies and Processes for Sustainably Prosperous Society” ISIJ International Vol.62(2022), No.12
  5. A novel way refining the partially reverted globular austenite in reversion from martensite ISIJ International Advance Publication
  6. Influence of Large Amount of Hydrogen Containing Gaseous Reductant Injection on Carbon Consumption and Operation Conditions of Blast Furnace - Development of Low Carbon Blast Furnace Operation Technology by using Experimental Blast Furnace: part II - ISIJ International Vol.62(2022), No.12
  7. Soft Sensors and Diagnostic Models Using Real Time Data of Blast Furnaces at Tata Steel ISIJ International Vol.63(2023), No.1
  8. Interaction Coefficients of Cu and Sn with Mn in Molten Iron at 1873 K ISIJ International Vol.62(2022), No.12
  9. Effect of SiO2 Content and Mass Ratio of CaO to Al2O3 on the Viscosity and Structure of CaO–Al2O3–B2O3–SiO2 Slags ISIJ International Vol.63(2023), No.1
  10. Application of Variable Gauge Rolling Technology for Plate to Reduce the Head Impact ISIJ International Advance Publication

Search Phrase Ranking

02 Feb. (Last 30 Days)

  1. blast furnace
  2. process
  3. aaa
  4. aaaa
  5. tetsu
  6. a
  7. aa
  8. orange peel
  9. ...
  10. experimental study on