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

ISIJ International
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ONLINE ISSN: 2185-811X
PRINT ISSN: 1342-5668
Publisher: THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE)

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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

Nobutaka WADA, Masami SAEKI

pp. 361-366

Abstract

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.

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

Optimum Design of Ladder Type SAW Filter Using a Simulated Annealing

Keiko ANDO, Mitsunori MIKI, Chikashi ICHIKAWA, Tomoyuki HIROYASU, Yukinori SASAKI, Daisuke MITANI

pp. 367-375

Abstract

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.

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Optimum Design of Ladder Type SAW Filter Using a Simulated Annealing

On a Design Method of Sampled-Data Delayed Feedback Controller via Interpolation

Kentaro HIRATA

pp. 376-383

Abstract

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.

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On a Design Method of Sampled-Data Delayed Feedback Controller via Interpolation

Consideration on Helical Crossover Method in Immune Algorithm for Job-Shop Scheduling Problem

Ichiro IIMURA, Ryo HIRAMI, Yoshifumi MORIYAMA, Shigeru NAKAYAMA

pp. 384-386

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Article Title

Consideration on Helical Crossover Method in Immune Algorithm for Job-Shop Scheduling Problem

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