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. 12 (1999), No. 11

  • Semi-Global L2 Gain Analysis of Linear Systems with Self-Scheduling Parameters

    Takehito AZUMA, Ryo WATANABE, Kenko UCHIDA

    pp. 639-646

    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.12.639

    Abstract

    In this paper, we consider semi-global L2 gain analysis for nonlinear systems described as linear systems with self-scheduling parameters. First we show a method to convert linear systems with self-scheduling parameters into linear systems with scheduling parameters based on evaluation of the domain of the self-scheduling parameters. Second, using the tools for linear systems with scheduling parameters, we discuss semi-global L2 gain analysis for the nonlinear systems and propose an approach together with feasible formulas of computation, which provides a solution to the so-called hidden loop problem in gain scheduling. Finally, we show numerical examples.

  • Stabilization of a Class of Nonholonomic Systems without Drift Using Time-State Control Form

    Hiromitsu KIYOTA, Mitsuji SAMPEI

    pp. 647-654

    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.12.647

    Abstract

    The authors have proposed the time-state control form and its control strategy to control a class of nonholonomic systems without a drift term, which method is more useful, or has broader applicable class of systems, than the chained form one. In this paper, necessary and sufficient conditions for transformation of a class of nonholonomic systems into the time-state control form are given, and new control strategy for the time-state control form to ensure the (exponential) stabilization of the subsystem by some sort of Lyapunov's discussion is also presented. For each of the topics, simple and illustrative example will be shown.

  • LPV Modeling and Gain Scheduled Control of ALFLEX Vehicle Flight Systems

    Atsumi OHARA, Masakazu IDE, Yasuhiro YAMAGUCHI, Masahiro OHNO

    pp. 655-663

    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.12.655

    Abstract

    In this paper, we show a result of practical flight control systems synthesis adopting recently developed gain scheduled control framework. First, we propose a general method to obtain linear parameter varying (LPV) model with norm bounded uncertainties from state space realization data at several operation points. Using the obtained LPV model, we next give a method to design a gain scheduling controller that satisfies multiple control specifications including classical stability margin. Finally, we apply these methods to the flight control systems synthesis of ALFLEX vehicle that requires many practical control specifications.

  • Design of a Static Anti-Windup Compensator which Guarantees Robust Stability

    Nobutaka WADA, Masami SAEKI

    pp. 664-670

    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.12.664

    Abstract

    In this paper, a design method of a static anti-windup compensator which guarantees robust stability subject to saturation nonlinearities and which attenuates a windup phenomena is proposed. Although this design problem has been considered as a non-convex problem in the previous works, we will show that it can be converted into a convex problem and described by linear matrix inequalities. Two numerical examples show the effectiveness of the proposed method.

  • Design of Nonlinear Robust Servosystems by Using LMIs

    Yuzo OHTA, Izumi MASUBUCHI

    pp. 671-679

    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.12.671

    Abstract

    In this paper, we consider a design problem of robust nonlinear servosystems which can achieve asymptotic tracking for constant reference inputs. The problem setting in this paper is a little bit different from the usual one. We suppose that the reference input will change from r to r* at time t = 0 and that the initial state of the system is located in a neighborhood of the equilibrium corresponding to the reference input r. Under this setting, we consider a design problem of robust nonlinear servosystems : we consider an augment system including the integrator, design a state feedback gain for the augment system using LMI, and give an input r (t) interpolating r and r* so that the state moves the prescribed regions depending r (t) and consequently the output converges to r*.

  • The Neural Networks Realization of Quasi-Gradient System to Search for Equilibrium Solutions in Game Theory and Their Dynamical Behavior

    Ryota HORIE, Eitaro AIYOSHI, Kippei MIYANO

    pp. 680-690

    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.12.680

    Abstract

    Mutually coupled plural Neural Networks (N.N.) modules are proposed from the view point of noncooperative game theory. First, new dynamical models, which is called “Quasi-Gradient System”, to search the Nash Equilibrium (NE) points under [0, 1] -interval or nonnegative constraints are proposed. The stability of the proposed searching models is analyzed by the linearization approach. In addition, relations between the Lotka-Volterra's ecological model or the population genetics model and the proposed searching models are indicated. Second, new mutually coupled plural N.N. modules are introduced to realize the proposed searching model for problems with quadratic objective functions. the asymmetric Hopfield type N.N. can be regarded as a special class of the proposed N.N. modules. Last, by simulations for simple problems, the biffurcations in dynamical behavior such as converging to different NE points, cyclic state transition with no NE points and other exceptional cases are shown.
  • © 1999 THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE)

Article Access Ranking

26 Sep. (Last 30 Days)

  1. Recent Progress of Instrumentation Technology for Process Automation in Steel Industry Tetsu-to-Hagané Vol.106(2020), No.9
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Accuracy Improvement of the XRD-Rietveld Method for the Quantification of Crystalline Phases in Iron Sintered Ores through the Correction of Micro-absorption Effects ISIJ International Advance Publication
  4. Melting Erosion Failure Mechanism of Tuyere in Blast Furnace ISIJ International Advance Publication
  5. Review on the High-Temperature Thermophysical Properties of Continuous Casting Mold Fluxes for Highly Alloyed Steels Tetsu-to-Hagané Advance Publication
  6. Evaluation and Prediction of Blast Furnace Status Based on Big Data Platform of Ironmaking and Data Mining ISIJ International Advance Publication
  7. An Empirical Comparative Study of Renewable Biochar and Fossil Carbon as Carburizer in Steelmaking ISIJ International Advance Publication
  8. Potential Influences of Impurities on Properties of Recycled Carbon Steel ISIJ International Advance Publication
  9. Optimization Analysis of Mechanical Performance of Copper Stave with Special-shaped Tubes in the Blast Furnace Bosh ISIJ International Advance Publication
  10. Influence of Soil Particle Size, Covering Thickness, and pH on Soil Corrosion of Carbon Steel ISIJ International Advance Publication

Search Phrase Ranking

26 Sep. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. ultrasonic testing bar small diameter
  4. jeong-sik kim
  5. blast furnace productivity
  6. isij international
  7. 柳修介
  8. continuous casting of copper alloys
  9. tetsu
  10. ultrasonic inclusion