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. 6 (1993), No. 4

  • On Application of Popov's Theorem for Lur'e Systems with Interval Plants

    pp. 165-170

    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.6.165

    Lur'e problems are historical ones dating back to the 60's, where uncertainties were taken into account only in nonlinear parts. In recent years, however, some new aspects are brought into the problems by taking uncertainties in linear parts as well, into consideration. A possible way to express these uncertainties in input-output relations is to use interval plants described by ratios of two interval polynomials. It is revealed recently that in order to guarantee absolute stability of a Lur'e system with an interval plant using the circle criterion, checking the condition of the criterion for only 16 extreme plants suffices.
    In this paper, we attempt to prove a parallel result for the Popov criterion. We show that the condition of Popov's theorem for the entire interval plant can be met by checking only 16 extreme plants. A numerical example is presented to illustrate the result.
  • Block Decoupling for Linear Systems over Unique Factorization Domains

    pp. 171-179

    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.6.171

    This paper studies in the framework of transfer matrices the block decoupling problem for linear systems over unique factorization domains. Necessary and sufficient conditions for an injective linear system to be block-decouplable by static feedback are obtained. Moreover the decoupling static state feedback is given. It is shown that the result obtained here is a generalization of the result given by Datta and Hautus in 1984, for systems over unique factorization domains having the same numbers of input and output. Further it is shown that the present result is a generalization of the conditions given by Hautus and Heymann in 1983 for systems over the field of reals.
  • A Method of Position and Heading Measurement Using Corner Cubes on Road Side

    pp. 180-188

    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.6.180

    This paper proposes a method to measure the position and heading of a vehicle on the road by use of the laser and corner cubes. The method uses the laser transmitter and receiver on the vehicle and a line of the retroreflecting targets on a side of the course. The on-board computer calculates the position and heading from the time data when the laser beams hits the corner cube. Each laser beam is set with a certain angle and an offset distance. Then, the time data when the laser beams return to the transmitter vary according to the position and heading of the moving vehicle. After corner cubes are detected by retroreflected laser beam, position and heading are calculated easily. The measured data will be used as the information for compensation of autonomous position computing system as well as for the alert of sleeping to the driver of the automobile.
  • A Continuation Method for Pole Assignment by Output Feedback

    pp. 189-195

    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.6.189

    A simple and efficient algorithm to obtain output feedback gain matrix by pole assignment is presented. This algorithm is based on the continuation method. In the continuation method the given problem is embedded into one parameter family of pole assignment problems and a path joining the initial known solution to the desired solution is traced. The original problem is reduced to the one of assigning the coefficients of the characteristic equation. The relations between the coefficients and the elements of the gain matrix are used fully to derive the homotopy function, from which simple path tracing algorithm is derived. The method requires neither computation of eigenfunctions nor eigen vectors of matrices, so that it is more efficient than the existing method based on continuation method. The efficiency of the algorithm is shown by several numerical examples.
  • Decentralized State Feedback Control of Large-Scale Discrete Event Systems

    pp. 196-203

    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.6.196

    We consider decentralized state feedback control of large-scale discrete event systems consisting of several subsystems which operate concurrently. A (global) control specification is assumed to be given by a predicate. First, we study the relationship between the controllability with respect to entire systems and that with respect to subsystems, which is important for the synthesis of decentralized state feedbacks for large-scale discrete event systems. Next, we derive a necessary and sufficient condition for a decentralized state feedback to achieve the global optimal predicate achievable by a global state feedback. Especially, in the case that a control specification can be reduced to the simultaneous satisfaction of local control specifications, we can design each local state feedback based upon the corresponding local specification.
  • A Probabilistic Model of the Discharge of Sewage for New Sewer Systems

    pp. 204-206

    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.6.204

Article Access Ranking

16 Sep. (Last 30 Days)

  1. Micro-structure and Mechanical Properties of Induction Heating Quenched and Tempered Spring Steel Tetsu-to-Hagané Vol.73(1987), No.16
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Preface to the Special Issue on “Recent Progress of Technique Elements for New Cokemaking Process” ISIJ International Vol.59(2019), No.8
  4. Removal of Phosphorus from High-phosphorus Iron Ore with Preliminary Reduction Treatment and Physical Concentration Tetsu-to-Hagané Vol.105(2019), No.9
  5. Atomic and Effective Pair Interactions in FeC Alloy with Point Defects: A Cluster Expansion Study ISIJ International Advance Publication
  6. Quantitative Analyses of Chemical Structural Change and Gas Generation Profile of Coal upon Heating toward Gaining New Insights for Coal Pyrolysis Chemistry ISIJ International Vol.59(2019), No.8
  7. Structure Analysis of High Strength Coke Using X-ray CT ISIJ International Vol.59(2019), No.8
  8. Accuracy Evaluation of Phase-field Models for Grain Growth Simulation with Anisotropic Grain Boundary Properties ISIJ International Advance Publication
  9. Influence of Shape of Cohesive Zone on Gas Flow and Permeability in the Blast Furnace Analyzed by DEM-CFD Model ISIJ International Vol.55(2015), No.6
  10. Perspective on Progressive Development of Oxygen Blast Furnace for Energy Saving ISIJ International Vol.55(2015), No.9

Search Phrase Ranking

16 Sep. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. blast furnace productivity
  4. micro-structure and mechanical properties of induction heating quenched and tempered spring steel
  5. mold
  6. tic&steel&solidification
  7. steel
  8. continuous casting
  9. ferrosilicon
  10. isij