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. 33 (2020), No. 3

  • Evaluation of Pillbug Phototaxis by using an Omnidirectional Motion Compensation System

    Yuki Kawano, Keiichi Otsuki, Masato Abe, Naohisa Nagaya, Shunsuke Shigaki, Ryusuke Fujisawa

    pp. 67-76

    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.33.67

    Abstract

    In this study, we evaluated a phototaxis of pillbugs(Armadillidium vulgare) by using a behavior measurement system consisting of an omnidirectional motion compensation mechanism and a cylin-drical LED display. At the first, to validate the phototaxis of pillbugs against unidirectional light stimulation, we conducted an experiment under continuous light stimulation from one direction for 30 minutes. Subsequently, to evaluate phototaxis performance under the condition that the direction of light stimulus changes alternately, we experimented under three iteration cycles conditions (160 s, 40 s, 10 s). Our results revealed that the pillbugs moved significantly in the direction of weak light intensity, and it suggested that the pillbugs has negative phototaxis. Moreover, we showed that the negative phototaxis became the strongest when the iteration cycle is 160 s, and the negative phototaxis tended to weaken as the iteration cycle became shorter. Also, when the iteration cycle is 10 s, an increase in residence time is found, suggesting that does not necessarily take the routine response behavior according to the situation.

  • An Efficiency Dependency Study on the Heat Management of the A-CAES Plant with Liquid Heat Medium Loops

    Yasuo Takagi, Kanami Sakamoto, Ryo Nakamichi, Takashi Sato

    pp. 77-86

    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.33.77

    Abstract

    The simulation results of the heat medium control and management of A-CAES plant (Adiabatic Compressed Air Energy Storage) are presented. For the study, the dynamic model of the A-CAES plant with liquid heat medium as heat storage is constructed in order to analyze charge-discharge cycle efficiency dependency on actual operating conditions. Various heat management systems for a CAES are proposed. Among the systems, heat medium circulating system is the most feasible solution. The heat management and storage is very important for the A-CAES plant, because about half of the energy is recovered through heat insulation and heat management. Dynamic plant efficiency analysis is also crucial because the dynamic properties of the plant influences on the efficiency. The model consists of the heat exchangers, the heat storages, the air storage and an ideal compressor and expander models. The heat transfer characteristics of the heat exchanger are tested by the experimental setup because the heat exchanger performance is the most important factor for the system efficiency. The plant scale and the heat loss influence on the charge-discharge efficiencies are shown through the simulations.

  • Synthesis of H∞ Controller based on Analytical Solution for Infinite Inertia Ratio in Disturbance Suppression Problem of Two-inertia System with High Inertia Ratio

    Shintaro Iwamoto, Yasuhide Kobayashi

    pp. 87-94

    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.33.87

    Abstract

    This paper proposes, for two-inertia system of low stiffness and high inertia ratio, a design method of a proportional controller that minimizes the closed-loop H∞ norm from the disturbance torque applied to the driven-side inertia to the driven-side angular velocity. The controller is to generate the driving-side torque by using the driving- and driven-side angular velocities, and is composed of two proportional coefficients configured by a simple calculation law which explicitly depends on the physical parameters. The method is based on the fact that the optimal H∞ controller is analytically derived for the case with infinite inertia ratio, and the controller for finite-inertia-ratio case is similarly given along with the derivation process by introducing an approximation due to high inertia ratio. Numerical examples show that the degradation in H∞ norm from the optimal solution is less than 0.02 dB for high inertia ratio of 10 or more. Control experiments show the validity of the proposed method.

  • An Identification Method for Single-Input Single-Output Linear Systems with Colored Output Noise Using Eigenvector Method

    Nobuo Komatsu

    pp. 95-103

    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.33.95

    Abstract

    A new algorithm is proposed to estimate parameters of Single-Input Single-Output system with colored output noise using eigenvector method. The algorithm is an expansion of the previously proposed algorithms proposed by the author with iterative estimation of the variances of noises. The newly proposed algorithm uses an iterative calculation and it consists of two parts. One part is the estimation of the system parameters using the variances and autocovariances of output noises. And it is assumed that the input noises are white Gausian noise with very small variances. The estimation of the system parameters is one of the least squares identification algorithms using eigenvector. The other part is the estimation of the variance and autocovariace of output noises using the estimated system parameters. Some simulations show the effectiveness of the proposed method.
  • © 2020 THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE)

Article Access Ranking

23 May. (Last 30 Days)

  1. Influence of Thermomechanical Treatment on Delayed Fracture Property of Mo-Bearing Medium-Carbon Steel ISIJ International Vol.62(2022), No.2
  2. Comparison of Oxidation Behavior of Various Reactive Elements in Alloys during Electroslag Remelting (ESR) Process: An Overview ISIJ International Advance Publication
  3. Dissolution Kinetics of Synthetic FeCr2O4 in CaO–MgO–Al2O3–SiO2 Slag ISIJ International Vol.62(2022), No.4
  4. Fundamentals of Silico-Ferrite of Calcium and Aluminium (SFCA) and SFCA-I Iron Ore Sinter Bonding Phase Formation: Effects of MgO Source on Phase Formation during Heating ISIJ International Vol.62(2022), No.4
  5. Interaction Coefficients of Mo, B, Ni, Ti and Nb with Sn in Molten Fe–18mass%Cr Alloy ISIJ International Vol.62(2022), No.3
  6. Phenomenological Understanding about Melting Temperature of Multi-Component Oxides Tetsu-to-Hagané Vol.108(2022), No.4
  7. Ironmaking Using Municipal Solid Waste (MSW) as Reducing Agent: A Preliminary Investigation on MSW Decomposition and Ore Reduction Behavior ISIJ International Advance Publication
  8. A Novel Process for Separation of Magnetite and Phosphorous Phases from a CaO–SiO2–FeO–P2O5 Slag ISIJ International Advance Publication
  9. Removal of Inclusions using Swirling Flow in a Single-Strand Tundish ISIJ International Advance Publication
  10. Influence of Acicular Ferrite Microstructure on Toughness of Ti-Rare Earth Metal (REM)-Zr Killed Steel Tetsu-to-Hagané Vol.108(2022), No.5

Search Phrase Ranking

23 May. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. blast furnace productivity
  4. galvannealing
  5. jet impingement
  6. jet impingement + cooling + runout table
  7. nitrogen
  8. refractory
  9. steel
  10. valve spring steel