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. 5

  • Delayed Feedback Control Resolving Difficulty in Stabilization by Manual Control

    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.18.165

    Generally, limitations of human accuracy in manual manipulation hinder the quality of work performed by human operators of manual control systems. In a system controlled by manual manipulation, unnecessary vibration in the system caused by the movements of the operator is undesirable. Therefore, effective suppression of undesired motion is required to enhance the accuracy of control systems. In this paper, we show that additional feedback control based on a delayed feedback mechanism is effective to suppress harmful oscillatory motions in such systems.
  • An AR Model Identification Method using a Prior Information and Its Application to a Spectral Estimation of Speech Signal

    pp. 171-177

    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.18.171

    A novel Auto Regressive (AR) model parameter estimation method is proposed, which can utilize a prior information as well as time series data, by extending the Burg method on the basis of the Minimum Cross Entropy (MCE) principle. As a practical application of the proposed method, we consider an approach to spectral estimation of speech data. In general, effectiveness of a prior information to spectral estimation results depends on the variation of speech signal. Thus we introduce an algorithm to determine the usage of a prior information, based on the divergence measure defined by the Kullback information. Finally, the estimation results for real speech data illustrate improved performance in comparison to the Burg method.
  • EM Algorithm for State-space Identification with Observation Outliers

    pp. 178-186

    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.18.178

    This paper considers an improvement of estimates of a state space model obtained by subspace system identification methods via the EM algorithm in the presence of observation outliers. To initialize the EM algorithm the initial estimates are obtained by two subspace identification methods : MOESP [1] and ORT [2]. The E- and M-steps in the EM algorithm are calculated when outliers are detected, by computing the conditional expectation under the assumption that the output data is incompletely observed. The outliers are detected and deleted in the EM algorithm by a simple scheme in robust statistics by using the median of the residuals, which are defined as the difference between the observed outputs and the estimated outputs computed from the initial estimates by subspace methods. Numerical examples show that the EM algorithm can monotonically improve the initial estimates obtained by subspace identification methods.
  • Minimax Estimation of Uncertain Systems in the Presence of Bounded Disturbance

    pp. 187-189

    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.18.187

  • Nonlinear Adaptive H Control for Robotic Manipulators

    pp. 190-192

    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.18.190

Article Access Ranking

14 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. 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
  5. Deformation Behavior of Longitudinal Surface Flaws in Flat Rolling of Steel Wire ISIJ International Advance Publication
  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. Numerical Study into Gravity Separation of Phosphorus from BOS Slag during Solidification ISIJ International Vol.61(2021), No.3
  9. Prediction of Spatial Composition Distribution of Inclusions in the Continuous Casting Bloom of a Bearing Steel under Unsteady Casting ISIJ International Vol.61(2021), No.3
  10. Improvement in Reduction Behavior of Sintered Ores in a Blast Furnace through Injection of Reformed Coke Oven Gas Tetsu-to-Hagané Vol.107(2021), No.4

Search Phrase Ranking

14 Apr. (Last 30 Days)

  1. blast furnace
  2. coke oven gas injection
  3. slag
  4. tetsu-to-hagané
  5. blast furnace productivity
  6. continuous casting of electrical steel
  7. electrical steel and continuous casting
  8. fundamental study on rapid reduction of chromium ore in basic oxygen furnace
  9. iron phosphide (fe2p, fe3p)
  10. iron phosphide (fe2p, fe3p), formation energy