Transactions of the Institute of Systems, Control and Information Engineers
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ONLINE ISSN: 2185-811X
PRINT ISSN: 1342-5668

Transactions of the Institute of Systems, Control and Information Engineers Vol. 20 (2007), No. 9

  • Disturbance Attenuation for Input Constrained Systems by Gain-Scheduled Feedback Control

    pp. 361-366

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    DOI:10.5687/iscie.20.361

    We propose a gain-scheduled control law for input constrained systems in the presence of disturbance. The proposed control law has a structure that a high-gain control law and a low-gain control law are interpolated by a single scheduling parameter. The scheduling parameter is computed online by solving a convex optimization problem with LMI constraints. We show that, by using the proposed scheduling algorithm, both feasibility of the control algorithm and closed-loop stability are guaranteed.
  • Optimum Design of Ladder Type SAW Filter Using a Simulated Annealing

    pp. 367-375

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    DOI:10.5687/iscie.20.367

    Surface Acoustic Wave (SAW) filters are a key device for mobile communication systems, and the high performance and low-loss of SAW filters has been increasing rapidly. The general design procedures for practical SAW filter are a trial-and-error approach by expert designers. The researches on the design of SAW filters using some different optimization algorithms (i.e. variable neighborhood search) have been the local search method so far. In these researches, the SAW filters are IDT type. Recently, the front-end with ladder type filter has proposed. This filter is low-loss type. The research of the ladder type SAW filter design using the optimization algorithm has not been performed. So, this paper proposed the design method of a ladder type SAW filter using simulated annealing.
  • On a Design Method of Sampled-Data Delayed Feedback Controller via Interpolation

    pp. 376-383

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    DOI:10.5687/iscie.20.376

    A design problem of delayed feedback controllers in the sampled-data system configuration is considered. Instead of indirect methods via the plant augmentation, we impose certain interpolation conditions on the free parameter of the stabilizing controller parametrization to embed the desired structure into the controller directly. Since the underlying stabilization problem to be solved is independent of the length of the delay, the proposed method avoids a computational burden when the ratio of the periods of the target orbit to the sampling becomes larger.
  • Consideration on Helical Crossover Method in Immune Algorithm for Job-Shop Scheduling Problem

    pp. 384-386

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    DOI:10.5687/iscie.20.384

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