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システム/制御/情報 Vol. 12 (1999), No. 1

ISIJ International
belloff
オンライン版ISSN: 2185-811X
冊子版ISSN: 1342-5668
発行機関: THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE)

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システム/制御/情報 Vol. 12 (1999), No. 1

2自由度最適1型サーボ系のタンクシステムへの応用と周波数領域での解析

長縄 明大, 平沼 雅裕, 愛田 一雄, 大日方 五郎

pp. 1-10

抄録

In this paper, we do an experimental study of two-degree-of-freedom optimal type-1 servo system based on the LQ (linear quadratic) method using a tank system. First, the experiments for the state feedback system which takes into account of a trade-off between low frequency sensitivity and guaranteed stability margin by using an integral gain are carried out. Next, we extend to the output feedback case and carry out the experiments to show the effectiveness of the LTR (loop transfer recovery) method or the integral gain. As the results of these experiments and its analysis in frequency domain, the influence of an observation noise which appears in the control input, the effect of disturbance rejection and robust stability for a plant perturbation are clarified.

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2自由度最適1型サーボ系のタンクシステムへの応用と周波数領域での解析

ニューロ識別における軸対称マスクの提案とGAによる最適化および最適結果の統計的解析

竹田 史章, 西蔭 紀洋

pp. 11-19

抄録

We have developed a neural network (NN) recognition and its hardware for paper currency. We have proposed mask concept to extract characteristics of the currency. Here, we propose a unique mask which has a symmetrical masked area against axes which divide a long side and short one of the currency. We can obtain the same value from both upright image and inverse one of the currency using the axis-symmetrical mask. This means that these values are invariant to upright and inverse of the currency conveyance. Namely, we can recognize twice number of currency kinds compared with the conventional mask though the NN construction is the same. Furthermore, we optimized the axis-symmetrical mask by genetic algorithm. Finally, we show the effectiveness of the optimization by statistical analysis of mask processed values.

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ニューロ識別における軸対称マスクの提案とGAによる最適化および最適結果の統計的解析

入出力データに基づく線形準最適補償器の構成

浜本 研一, 杉江 俊治

pp. 20-26

抄録

In this paper, we consider a suboptimal control problem based on the input-output data through the LFT representation. First we describe the suboptimal control problem in a general setting via the LFT. Then we solve the problem via numerical optimization, where the relation between the design parameters and the cost function plays a key role. For this equation, we discuss how to solve the optimization problem. Finally, we give numerical examples of controller design to demonstrate its effectiveness.

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入出力データに基づく線形準最適補償器の構成

金型生産スケジューリング問題に対する遺伝アルゴリズムの適用

芦沢 一宏, 飯間 等, 三宮 信夫, 鈴木 輝, 小林 靖宜

pp. 27-35

抄録

This paper deals with a large-scale scheduling problem for a metal mold assembly process of automatic vending machines, which is based on a job shop process with additional conditions such as precedence constraints among jobs, parallel machines, and introduction of multi-function machines. The objective of the problem is to minimize the sum of the tardiness of each product. The genetic algorithm (GA) is applied to this problem. Particularly, a method for generating initial individuals and a mutation procedure are proposed. It is observed through simulations for a real data that GA is more effective than a heuristic method.

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金型生産スケジューリング問題に対する遺伝アルゴリズムの適用

2枚の時空間画像を用いた通過人数計測

寺田 賢治, 山口 順一

pp. 36-43

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In this paper, an automatic counting method of the passing people through the gate is proposed. In the proposed method, two measurement lines are set on the floor of the inside and outside of the gate at right angle with the moving directions of the passing people. The images of the passing people are obtained in series and two space-time images are generated at each measurement line. By detecting which line the person passes early, the moving directions of the passing people are recognized. Finally, the incoming persons and the outgoing persons could be measured by counting the people data with each direction information. In this paper, we describe the algorithm of counting the passing people using the two space-time images and show some experimental results obtained by using a simple experimental system to verify effectiveness of the proposed method.

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2枚の時空間画像を用いた通過人数計測

LTR特性をもつ強正実H2コントローラの構成

下村 卓, 川崎 勝正, 藤井 隆雄

pp. 44-55

抄録

This paper considers a synthesis problem for such observer based controllers that are strictly positive real and H2 optimal at the same time. We consider this problem in particular from the viewpoint of the inverse problem, and provide a parametrization of the controller, which shows an interesting coupling structure between the regulator and the observer gains. Among them, we concentrate on an weakly coupled class in this paper to have the LTR structure, which was not provided by the original result. For the class, we give conditions on design parameters for ensuring both properties, which can be independently calculated although the problem is the mixed one.

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LTR特性をもつ強正実H2コントローラの構成

混合音からの基本周波数分離抽出

白土 保

pp. 56-62

抄録

A method for extracting fundamental frequencies from a mixed tone perfomed by natural instruments is proposed. Acoustical features are assumed in this study : (1) Low-order harmonics have greater powers than other partials, (2) powers of harmonics are continuous in time, and (3) the power spectrum for a mixed tone can be approximated by summing the power spectra of each tone. The “fundamental-ness” of the partials is introduced by these features. Duet and trio tones performed by natural instruments are used as test tones. The averages of the correct identification rates evaluated by performed musical notes are 84%-96% for duet tones, 80%-87% for trio tones.

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混合音からの基本周波数分離抽出

シミュレーションベーススケジューリングにおけるパラメータ空間探索改善法のためのパラメータ設定法

冬木 正彦, 荒川 雅裕, 杉原 俊昭, 股野 健治, 井上 一郎

pp. 63-65

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シミュレーションベーススケジューリングにおけるパラメータ空間探索改善法のためのパラメータ設定法

補間演算を含む直線位相再帰型ディジタルフィルタ実現への一系統化手法

金 台烋, 内田 倫人, 山下 亮, 中川 智明, 渡部 達也

pp. 66-68

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補間演算を含む直線位相再帰型ディジタルフィルタ実現への一系統化手法

擬マハラノビス距離によるファジィc-Meansクラスタリング

大上 将之, 市橋 秀友, 三好 哲也

pp. 69-71

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擬マハラノビス距離によるファジィc-Meansクラスタリング

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