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. 19 (2006), No. 12

  • Analysis of Nonlinear Systems in Specified Regions of the State Space by Using Density Functions Characterizing Positively Invariant Sets

    pp. 453-461

    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.19.453

    This paper is concerned with analysis of positive invariance and regional almost convergence of nonlinear systems by using density functions. It is shown that if there exists a density function that is positive inside a set and zero on its boundary then the set is positively invariant and almost all of the trajectories starting from the set are convergent. This result is applicable to controller synthesis for nonlinear systems by using convex optimization with satisfying state and input constraints. Furthermore, converse theorems are provided to ensure the existence of such density functions under mild assumptions.
  • Construction of the Population Dynamics Predictive Model of Sika deer in Hyogo by Petri Nets

    pp. 462-468

    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.19.462

    This paper proposes the model used Petri Net in which the population of Sika deer in Hyogo can be estimated. In the proposed model, Hyogo is divided into 16 small areas and the number, birth, death, and movemont of Sika deer in each area can be expressed. However the number of Sika deer cannot be measured directly, a new conversion coefficient of density index into the number of Sika deer is defined. Unknown parameters, i.e., death rate, traveling rate between two areas and the conversion coefficient, are identified by a genetic algorithm from using the measured data.The availability of this proposed method is proven through some simulation results.
  • Permutation Correction in Frequency Domain ICA Using Propagation Characteristics in Real Environments

    pp. 469-476

    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.19.469

    When the frequency domain ICA is applied to noise reduction in a real environment, it is essential to solve the scaling and permutation problems peculiar inherent in frequency domain ICA. The present paper gives a solution to the problems in a real environment. The proposed method is simple, the amount of calculation is small. And the method has high correction performance without depending on the frequency bands and distances from source signals to microphones. Furthermore, it can be applied under the real environment. From several experiments in a virtual room and a real room, it clarifies that the proposed method has been verified.
  • Trajectory Tracking Control of Mechanical Systems with Obstacle Avoidance

    pp. 477-487

    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.19.477

    This paper addresses a trajectory tracking problem of mechanical systems with obstacle avoidance. Our strategy to improve obstacle avoidance is based on the field potential method using an existing navigation function. However, direct application of this function to trajectory tracking can hinder obstacle avoidance. We newly introduce a parameterized function representing a reference trajectory and propose a feedback law to control the parameter, thereby ensuring effective obstacle avoidance. Successful trajectory tracking is achieved by the convergence of the coordinates of the systems to the parameterized function. Because our method adopts a bounded navigation function, the proposed controller produces a bounded input signal even when the coordinates approach obstacles. Finally, a simulation of a two-link manipulator illustrates the effectiveness of the proposed method.
  • Jerk Reduction Control of Two-Mass Transfer System

    pp. 488-495

    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.19.488

    This paper considers vibration suppression of a two-mass transfer system, where the work is connected with the hand flexibly. We adopt the idea of jerk reduction of the hand. For this purpose, we derive a state equation including the jerk and acceleration of the hand. Since it contains the differential of input, it is not possible to apply standard control theory. For this reason, we modify the state equation to exclude the differential of input by introducing a new state variable. Then, we design optimal state feedback for a suitable cost function, and show that jerk reduction of the hand is effective for vibration suppression of the work. Since the state feedback containing the jerk and acceleration is not practical, we propose a computation method for an optimal feedback control law using only displacements and velocities.

Article Access Ranking

27 Jun. (Last 30 Days)

  1. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  2. Hydrogen Embrittlement Susceptibility Evaluation of Tempered Martensitic Steels Showing Different Fracture Surface Morphologies ISIJ International Advance Publication
  3. Production and Technology of Iron and Steel in Japan during 2018 ISIJ International Vol.59(2019), No.6
  4. Effect of a Zn Interlayer on the Adhesion Strength and Corrosion Resistance of Zn–Mg Coated TRIP Steel ISIJ International Vol.59(2019), No.6
  5. Fundamentals of Silico-Ferrite of Calcium and Aluminium (SFCA) Iron Ore Sinter Bonding Phase Formation: Effects of Titanium on Crystallisation during Cooling ISIJ International Vol.59(2019), No.6
  6. A Kinetic Model of Mass Transfer and Chemical Reactions at a Steel/Slag Interface under Effect of Interfacial Tensions ISIJ International Vol.59(2019), No.5
  7. Evaluation of the Structure and Strength of Coke with HPC Binder under Various Preparation Conditions ISIJ International Advance Publication
  8. Recycling of Blast Furnace Sludge to the Blast Furnace via Cold-Bonded Briquettes: Evaluation of Feasibility and Influence on Operation ISIJ International Advance Publication
  9. Evolution Mechanism of Inclusions in H13 Steel with Rare Earth Magnesium Alloy Addition ISIJ International Advance Publication
  10. Continuous Process of Pig Ironmaking using Focused Microwave Beams at 2.45 GHz ISIJ International Vol.59(2019), No.6

Search Phrase Ranking

27 Jun. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. blast furnace productivity
  4. phosphate treatment
  5. assimilation
  6. balling index
  7. bubbling ladle
  8. inclusions
  9. isij xafs
  10. lme