巻号一覧
45 巻, 6 号
選択された号の論文の7件中1～7を表示しています
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論文
計測
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中島 利郎, 仲嶋 一, 的場 修2009 年 45 巻 6 号 p. 291-297
発行日: 2009年
公開日: 2011/11/03
ジャーナル フリーThis paper reports a sensor for the plant inspections to detect leaking vapor. Plants are usually inspected by patrolling inspectors. It requires high level skills to selectively detect abnormal phenomena occurring in various types of equipment under the complicated environments. In this research, we developed a remote detecting sensor for the vapor leaking from piping, which is one of the priority control items inside plants. The basic principle of the sensor is specifically to sense the scattered light when laser beam is illuminated on the vapor. It is also discovered in our basic experiments that there is big difference in the polarization property between the light scattered by vapor and surface structures inside plants. The sensor can discriminate the light scattered by vapor from other types of scattered light utilizing the difference of the polarization property, then detecting the light scattered by vapor only. A prototype model is fabricated for substantiating the basic property of leaking vapor detection. As a result, it is confirmed that the prototype model not only has sufficient detecting capability, but can selectively detect vapor only. In conclusion, it is confirmed that the developed sensor satisfies the requirements for the plant inspection sensors, and has sufficient capability for practical usage.抄録全体を表示PDF形式でダウンロード (1263K)
制御
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—直接擬似変換法による雑音特性の改善—土井 正好, 森 泰親2009 年 45 巻 6 号 p. 298-304
発行日: 2009年
公開日: 2011/11/03
ジャーナル フリーThis paper describes a Generalized Minimum Variance Control(GMVC) sterategy for Time Varying System(TVS). GMVC is one of predict control methods, which are effective to Time Delay syatem. In TVS, polynoominals of model are noncommutativity. Then, the cost function can not be optimized with accuracy because noncommutative noise term remains. This paper applies a pseudocommutativity to improve the noncommutativity in TVS. The proposed pseudocommutativity has a durability against the effect of time shift of time varying multiplications. The GMVC sterategy holds a simple structure.抄録全体を表示PDF形式でダウンロード (389K) -
黒木 秀一, 越山 陽平, 湯野 洋司2009 年 45 巻 6 号 p. 305-312
発行日: 2009年
公開日: 2011/11/03
ジャーナル フリーThe RCA cleaning method is the industry standard way for cleaning silicon wafers, and the temperature control is important for a stable cleaning performance. However, the difficulty lies in the fact that the RCA solutions cause nonlinear and time-varying exothermic chemical reactions. So far, the MSPC (model switching predictive controller) using the CAN2 (competitive associative net 2) has been developed and the effectiveness has been validated. However, we have observed that the control performance, such as the settling time and the overshoot, does not always improve with the increase of the number of learning iterations for the CAN2. To solve this problem, we introduce the bagging method for the CAN2 and first-difference signals for effectively embedding the bagging method. The effectiveness and the performance of the present method are examined by means of numerical experiments.抄録全体を表示PDF形式でダウンロード (903K) -
岡島 寛, 浅井 徹, 川路 茂保2009 年 45 巻 6 号 p. 313-319
発行日: 2009年
公開日: 2011/11/03
ジャーナル フリーIn this paper, tracking performance limitations for plants with input delay are considered. It is important to know the performance limitations for plants to design controllers and to design plants. Our objective is to find the fundamental limitation of the transient response in tracking control problem. When plant have input delay, no one would deny that tracking performance becomes worse than the plants without input delay. However performance limitations for such plants have not been derived analytically. We derive the performance limitations based on internal model control framework. The difference between plants with delay and without delay is compared by numerical examples.抄録全体を表示PDF形式でダウンロード (578K) -
甲斐 健也, 環 一穂2009 年 45 巻 6 号 p. 320-326
発行日: 2009年
公開日: 2011/11/03
ジャーナル フリーThis paper deals with a control problem for a space robot of two rigid bodies subject to initial angular momentum. We first give a model of a space robot with initial angular momentum, called the universal joint model. Next, we propose a near-optimal control method for nonlinear affine control systems based on the finite-dimensional Fourier basis, and show a near-optimal control algorithm. Then, we apply the near-optimal control algorithm to 3D attitude control of the universal joint model with initial angular momentum, and show some simulations to indicate the effectiveness of the proposed method.抄録全体を表示PDF形式でダウンロード (552K)
システム・情報
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相川 直幸, 森 幸男2009 年 45 巻 6 号 p. 327-333
発行日: 2009年
公開日: 2011/11/03
ジャーナル フリーWe present a kernel for sampling rate conversion based on Nth polynomials and ratio of each block. The proposed kernel is approximated a main robe of Sinc function by the Nth polynomial and side robes by the different Nth polynomial function and/or its amplitude ratio. The optimization of kernel is carried out by semidefinite programming (SDP). The proposed kernel has the advantage of not redesigning one whenever a sampling rate is changed. Moreover we present the kernel realized in the Farrow structure form. The usefulness of the proposed kernel is verified through examples.抄録全体を表示PDF形式でダウンロード (813K)
ショート・ペーパー
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小川 将司, 佐伯 正美2009 年 45 巻 6 号 p. 334-336
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 new approach for synthesizing low order H∞ controllers without using the rational approximation of the D-scale in the DK-iteration. This approach can be executed on the frequency domain. The sequence of the H∞ norm of the scaled closed-loop function is guaranteed to be nonincreasing.抄録全体を表示PDF形式でダウンロード (398K)
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