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. 31 (2018), No. 8

  • Introduction of a Weighting Factor Setting Technique for Multi-Objective Optimization

    pp. 281-294

    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.31.281

    In production planning and logistics planning, there are multiple purposes which are to reduce cost of procurement and to shorten transportation time, and so on. These are sometimes contrary to each other and have different units. To adjust the balance of these purposes is important to the satisfaction of operators for the plan. Although various methods have been proposed in these multi-objective optimizations, there exists a problem it is impossible to derive the satisfactory result for operators, because the reason for the difficulty of judging for each purpose. Therefore, in this paper, we consider the achievement as operators’ preferred solution and aim to obtain a satisfactory plan for operators by proposing a method to estimate the importance of each objective to obtain this preferred solution. In the proposed method, the weighting coefficient of the problem is estimated as an inverse problem. In the cases the preferred solution is a Pareto optimal solution and a base solution, or the preferred solution is not a Pareto optimal solution or a basis solution, but a Pareto optimal constraint is given, it was confirmed that we can estimate the weighting coefficient to make the optimal solution is consistent with the preferred solution.
  • Cooperative Linear Production Planning with Pooling of Resources

    pp. 295-304

    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.31.295

    In this paper, we deal with a cooperative production planning model in which multiple firms mutually pool a part of resources procured by themselves. Although the firms are cooperative in the sense that pooling of the resources is allowed, we consider an equilibrium model in which the firms maximize their own profits and a Nash equilibrium point with respect to their profits is calculated. Finally, we show allocation schemes based on a cooperative game arising from the cooperative linear production planning with pooling of the resources because the total profit of all the firms in the cooperative production planning model is larger than that in the independent production planning model without pooling. Calculating the Nash equilibrium points of a numerical example with various pooling rates and the corresponding profit allocations, we demonstrate the validity of the proposed cooperative production planning model.
  • Multi-objective Steering Law Design for Attitude Control of a Spacecraft with CMGs

    pp. 305-311

    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.31.305

    Much attention has been paid on CMGs (Control Moment Gyros) as a large torque generator of spacecraft. There are many studies on singularities of CMGs. However, the steering law in their studies has achieved only singularity avoidance in most cases. In this paper, we propose a multi-objective steering law which achieves complete 3-axis attitude control while considering not only singularity avoidance but also another function. First, we introduce a steering law for both singularity avoidance and power optimization. Second, we propose another steering law for both singularity avoidance and achieving preferred gimbal angles. Regarding the control law, we apply a GS (Gain-Scheduled) controller via LPV control theory while introducing a Parameter-Dependent Coordinate Transformation.

Article Access Ranking

11 Jul. (Last 30 Days)

  1. Production and Technology of Iron and Steel in Japan during 2019 ISIJ International Vol.60(2020), No.6
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Scheduling in Continuous Steelmaking Casting: A Systematic Review ISIJ International Vol.60(2020), No.6
  4. Numerical Simulation of Fluid Flow and Solidification in a Vertical Round Bloom Caster Using a Four-port SEN with Mold and Strand Electromagnetic Stirring ISIJ International Advance Publication
  5. Numerical Simulation for the Influence of EMS Position on Fluid Flow and Inclusion Removal in a Slab Continuous Casting Mold ISIJ International Vol.60(2020), No.6
  6. Sinter Pot for Temperature Measurement of the Top Layer during and After the Ignition ISIJ International Advance Publication
  7. Taguchi Orthogonal Test on Granule Properties and Porosity Distribution in Sintering Bed using High-resolution X-ray Computed Tomography ISIJ International Vol.60(2020), No.6
  8. From Iron Ore to Crude Steel: Mass Flows Associated with Lump, Pellet, Sinter and Scrap Iron Inputs ISIJ International Vol.60(2020), No.6
  9. Tension Leveling Using Finite Element Analysis with Different Constitutive Relations ISIJ International Vol.60(2020), No.6
  10. Experimental Evaluation of Texture Change during Grain Growth in Electrical Steel Sheets and Its Prediction by Phase Field Simulation Tetsu-to-Hagané Vol.106(2020), No.7

Search Phrase Ranking

11 Jul. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. blast furnace productivity
  4. cao sio2 viscosity
  5. 17-7 ph
  6. hole expansion ratio
  7. big data
  8. cao
  9. cold formed bainitic steel
  10. digitalization