巻号一覧
45 巻, 7 号
選択された号の論文の7件中1～7を表示しています
- |<
- <
- 1
- >
- >|
論文
制御
-
孫 連明, 佐野 昭2009 年 45 巻 7 号 p. 339-348
発行日: 2009年
公開日: 2011/11/03
ジャーナル フリーOutput over-sampling based closed-loop identification algorithm is investigated in this paper. Some instinct properties of the continuous stochastic noise and the plant input, output in the over-sampling approach are analyzed, and they are used to demonstrate the identifiability in the over-sampling approach and to evaluate its identification performance. Furthermore, the selection of plant model order, the asymptotic variance of estimated parameters and the asymptotic variance of frequency response of the estimated model are also explored. It shows that the over-sampling approach can guarantee the identifiability and improve the performance of closed-loop identification greatly.抄録全体を表示PDF形式でダウンロード (633K) -
柏尾 知明, 池田 建司, 下村 隆夫2009 年 45 巻 7 号 p. 349-355
発行日: 2009年
公開日: 2011/11/03
ジャーナル フリーThis paper proposes an estimation method of the transition time of hybrid systems in piecewise linear (PWL) form by using wavelet analysis. If each transition time is known, the continuous dynamics between adjacent discrete transitions will be identified by conventional identification method for continuous systems. The discrete transition is represented as a switching of differential equations or a jump of continuous states. These changes can be detected as characteristic patterns in wavelet transform of an output signal. First, detectability of the discrete transition is defined and its necessary and sufficient condition is derived. Under the assumption of the detectability of the discrete transition, an output signal is represented by using Taylor expansion around the transition time. In addition, the characteristic patterns in the wavelet transform of an output signal are analyzed. An estimation method of the transition time based on the analyzed pattern is proposed. Finally, the effectiveness of the proposed method is illustrated by numerical examples.抄録全体を表示PDF形式でダウンロード (862K) -
東 俊一, 杉江 俊治2009 年 45 巻 7 号 p. 356-360
発行日: 2009年
公開日: 2011/11/03
ジャーナル フリーThis paper addresses a model-matching problem between a given SISO nonlinear plant and the cascade connection of the plant and a quantizer to be designed. First, a closed-form solution to the problem is derived. From this, we next show several fundamental properties of the optimal quantization for control. Finally, the performance of the proposed quantizer is demonstrated by numerical simulations.抄録全体を表示PDF形式でダウンロード (335K)
システム・情報
-
古屋 保, 森 邦彦2009 年 45 巻 7 号 p. 361-368
発行日: 2009年
公開日: 2011/11/03
ジャーナル フリーIn this study, we propose a new method for an inverse halftoning technique. Inverse halftoning technique is to restore a continuous tone (gray-scale) image from halftone (bi-level) image. Usually, it is not easy to derive gray-scale color (8bits/color) from only a bi-level data (black and white). We considered generating a gray-scale value from bi-level data as an optimum searching problems. Then, we propose a method of the inverse halftoning technique using the genetic algorithms without depending on the halftone kernel. As a result, a high quality image can be restored without depending on a halftone kernel.抄録全体を表示PDF形式でダウンロード (2111K) -
若竹 雅人, 西 竜志, 乾口 雅弘2009 年 45 巻 7 号 p. 369-378
発行日: 2009年
公開日: 2011/11/03
ジャーナル フリーIn this paper, we propose a decomposition and coordination method for timed automata for modeling and solution of flowshop scheduling problems. Parallel composition of timed automata makes it possible to describe concurrent dynamics for several submodels. To reduce state space explosion for solving an optimal state transition problem represented by the parallel composition of timed automata, a decomposition and coordination method for timed automata is developed. In the proposed method, a feasible solution is derived by the replication of solving each subproblem and coodinating the solution of each decomposed subproblem. Computational experiments demonstrate the effectiveness of the proposed method for flowshop scheduling problems.抄録全体を表示PDF形式でダウンロード (503K)
システムインテグレーション
-
小鷹 研理, 丹羽 治彦, 坂本 義弘, 菅野 重樹2009 年 45 巻 7 号 p. 379-387
発行日: 2009年
公開日: 2011/11/03
ジャーナル フリーA method of estimating pose of a robot on a lattice of RFID tags is described. There is a model room in WABOT-HOUSE Laboratory of Waseda University where the floor is equipped with a lattice of RFID tags at 300 mm intervals, simulating a future home environment where robots interact symbiotically with humans. This paper propose a method that uses Monte Carlo localization to estimate the pose of robot on the lattice more precisely than the interval of tags. The experience shows the position and orientation error converge at about 50 mm (straight movement) / 20 mm (rotating movement) and less than 0.1 radian using some properly designed model-parameters, which are tuned in accordance with our simulation results, when two readers are placed appropriately. Moreover, we describe some items about where readers should be placed.抄録全体を表示PDF形式でダウンロード (3435K)
ショート・ペーパー
-
藤本 理唯宇, 鈴木 秀俊, 坂本 登2009 年 45 巻 7 号 p. 388-390
発行日: 2009年
公開日: 2011/11/03
ジャーナル フリーIn this report, a nonlinear optimal servo system for a magnetic levitation system is designed and its effectiveness is confirmed by an experiment. In the design of nonlinear servo systems, it is necessary to solve the regulator equations and construct a stabilizing feedback law. First, by feedback linearization, the regulator equations are solved. Second, the Hamilton-Jacobi equation for optimal stabilization is solved by using the stable manifold approach.抄録全体を表示PDF形式でダウンロード (273K)
- |<
- <
- 1
- >
- >|