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. 3 (1990), No. 2

  • A Robust Control of Induction Motor Drives by Nonlinear State Feedback-Experimental Verification

    pp. 29-37

    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.3.29

    We have already proposed a nonlinear feedback control of induction motor drives, where the induction motor is modeled as a bilinear system. This control method guarantees the robust stability in the large. Whereas it is not guaranteed by the so-called vector control method.
    This paper gives some experimental results obtained by applying the proposed method to a practical induction motor which is fed by a three-phase twelve-pulse bridge cycloconverter. The proposed method is implemented by a digital signal processor which is a special microprocessor designed for the high speed signal processing. The performance of the proposed method is verified by these experimental results. These results also show that the proposed method is superior, at least for robust stability against the secondary resistance variation from the nominal value, to the vector control method. At the last section, this paper also gives some remarks on applications of this control method to practical systems.
  • An Approximation Method for Discrete-Time Linear Systems with the Internal Structure

    pp. 38-45

    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.3.38

    In this paper an approximation method for discrete-time linear systems with the internal structure is proposed. For this, the method of Mullis-Roberts is used. A reduced order model constructed through this method retains the same internal structure as the original one. It is also an optimal approximation in the sense that it minimizes the curvilinear integral of the squared norm of an approximation error along the unit circle of z-plane.
    It is shown that the Levinson-Wiggins-Robinson algorithm can be used as a fast recursive algorithm computing the reduced order model.
    A feature of this method is that we can compute reduced order ARMA-type models of each subsystem independently. Thus, subsystems to be reduced are arbitary chosen.This approximation method can also be used for identifying each subsystem composing the total system.
  • Modality Constrained Programming Problems and Various Fuzzy Mathematical Programming Problems

    pp. 46-54

    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.3.46

    The modality constrained programming (MCP) problems were previously proposed by the authors. MCP problems are a sort of fuzzy mathematical programming (FMP) problems and have some analogy with the chance constrained programming (CCP) problems. In MCP problems, the probability in CCP problems is replaced by the possibility or the necessity.
    In this paper, we focus on the relationships between MCP problems and the other various FMP problems, i.e., flexible programming problem, fuzzy goal programming problem, FMP problem of Orlovsky, that of Tanaka et al., that of Inuiguchi et al. and that of Dubois. FMP problems discussed in this paper can be interpreted in the framework of MCP problems. MCP problems are the basic models for unifying FMP problems.
  • Development of a Voice Input System to a Personal Computer with Improved Recognition Score

    pp. 55-64

    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.3.55

    The performance of a personal computer has improved very much and also the price has become low. Accordingly, the opportunity that amateur or physically handicapped persons utilize computers is increasing. But the typing from a key board has so far been a main input method to a computer. This method is annoying for these people. We developed a voice input system to a computer. In this system we are using a voice recognition device on the market. The device is a word recognition system for a special speaker.
    There are many cases when voice recognition fails among similar utterance words. We propose the improvement method of recognition score that utilizes a simple learning system. This learning system is evaluated by voice recognition experiments. From experimental results, we have been able to confirm that this learning system has an improved effect in voice recognition.
  • Dynamic Characterization of Interconnected Power System as Nonholonom-Rheonomic System

    pp. 65-67

    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.3.65

Article Access Ranking

17 Apr. (Last 30 Days)

  1. Three-dimensional Investigations of Non-metallic Inclusions in Stainless Steels before and after Machining ISIJ International Advance Publication
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Influence of Ore Assimilation and Pore Formation during Sintering on Reduction Behavior of Sintered Ores Tetsu-to-Hagané Vol.107(2021), No.3
  4. Steam Reforming of Methane on Sponge Iron: Influence of Gas Composition on Reaction Rate ISIJ International Vol.61(2020), No.1
  5. Numerical Simulation of Flow, Heat, Solidification, Solute Transfer and Electromagnetic Field for Vertical Mold and Curved Mold of Billet ISIJ International Vol.61(2021), No.3
  6. Structural and Mechanical Characterizations of Top Dross in a Molten Zinc Bath ISIJ International Vol.61(2021), No.3
  7. Dissolution Behavior of Mg and Ca from Dolomite Refractory into Al-killed Molten Steel ISIJ International Advance Publication
  8. Effect of Rare Earth Ce on the Morphology and Distribution of Al2O3 Inclusions in High Strength IF Steel Containing Phosphorus during Continuous Casting and Rolling Process ISIJ International Vol.61(2021), No.3
  9. Deformation Behavior of Longitudinal Surface Flaws in Flat Rolling of Steel Wire ISIJ International Advance Publication
  10. Preface to the Special Issue on “Toward Suppression of Hydrogen Absorption and Hydrogen Embrittlement for Steels” ISIJ International Vol.61(2021), No.4

Search Phrase Ranking

17 Apr. (Last 30 Days)

  1. blast furnace
  2. coke oven gas injection
  3. tetsu-to-hagané
  4. blast furnace permeability
  5. blast furnace productivity
  6. slag
  7. ultrasonic inclusion
  8. continuous casting of electrical steel
  9. deoxygen in liquid iron
  10. electrical steel and continuous casting