巻号一覧
23 巻, 6 号
選択された号の論文の21件中1～21を表示しています
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瀬崎 正博, 衣笠 晨策1987 年 23 巻 6 号 p. 545-550
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーThe pressure sensing elements such as diaphragm, Bourdon tube and bellows are widely used as pressure or differential pressure transmitters. These sensors are conventionally improved in order to get high accuracy and high reliability. However the phenomenon under that the calibrated sensor drifts gradually is not researched enough because of difficulty to collect data.
The authors named the factors to accelerate drift as stress. High temperature, excessive input, repeating input, corrosion and erosion also can be stresses. Especially in the case of pressure sensing element the time itself is stress. Drift proceeds even if the sensor is set without actual use. It is due to the creep or after elastic effect that generates on the pressure sensing element.
In this paper the authors induced theoretical formula of stress relaxation based on the metal property theory, and proved it by means of experiment using 316 stainless steel strip which material is used for pressure sensing element over 90%. We observed frequency variance of self excited oscillation of stainless steel strip in order to measure small variance of stress precisely. We developed current transformer method in order to oscillate the tensile strip of non-magnetic material.
Chapter 2 of this paper is the hypothesis of stress relaxation. We made the model on which the dislocation rides over the barrier according to Einstein's solid body specific heat theory adding the modificaion by means of Debey's highest energy level. Thus the theoretical formula was presented. In chapter 3 experiment device and method is reported in detail. Chapter 4 is presentation of experiment data and discussion concerning the hypothesis. Experiment result was sufficient to prove the hypothesis. In chapter 5 mechanism of after elastic effect is discussed, and method of drift free plastic work is proposed.抄録全体を表示PDF形式でダウンロード (760K) -
佐藤 拓宋, 東島 英輔, 増田 則夫, 山越 芳樹1987 年 23 巻 6 号 p. 551-557
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーA new method for the measurement of gas temperature distribution along a desired line is proposed.
A probing wave with contineous small amplitude of relatively high frequency is propagated along the line and the pumping wave with impulsive and high pressure is emitted from the opposite direction. Then the temperature of the gas at each point on the line is transformed into the phase change of the probing wave sequentially along with the propagation of the pumping wave due to the nonlinear effect generated by the pumping wave. The phase demodulation and proper signal processings to get the temperature distribution are shown. The effect of flow is also eliminated in the system.
The principle, details of the system construction and some experimental results are presented. The results clearly show the effectiveness of the proposed method.抄録全体を表示PDF形式でダウンロード (733K) -
藤原 哲雄, 服部 晋, 菱刈 功, 清水 孝雄1987 年 23 巻 6 号 p. 558-564
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーA standard blackbody furnace for the calibration of commercially available radiation thermometers has been developed. This furnace has a cavity of chrome plated copper walls with an opening of 60mm in diameter. The furnace is designed so that the temperature of the cavity can be easily estimated by a resistance thermometer. It is shown that the furnace has an accuracy of 1K through the comparison with two fixed point blackbodies when the effective emissivity, the size-of-source effect and the absorption by water vapor of the air are corrected for.抄録全体を表示PDF形式でダウンロード (969K) -
寺尾 吉哉, 高本 正樹, 深見 輝基1987 年 23 巻 6 号 p. 565-569
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーAs to an ultrasonic flowmeter which deduces flowrate from the propagating time of ultrasonic pulse wave in the flow, it is very important to accurately detect the pulse wave reaching the ultrasonic transducer. In a conventional ultrasonic flowmeter, a constant threshold is set to detect a certain peak in the leading edge of the received pulse wave. But when the amplitude of the received pulse wave fluctuates due to a disturbance in the flow, ‘trigger-miss’ often happens as it is difficult to identify the same peak by a constant threshold.
In the present study a new method has been developed to consistently detect the pulse wave even when there exists strong fluctuation. Two pairs of ultrasonic transducers are placed across the flow and transmit two waves of different frequencies simultaneously. These waves are received at the opposite side and are added together in an electric circuit to generate some predominant peaks at the leading edge of the pulse. Setting the threshold to one of the predominant peaks, detection of the pulse wave is much less affected by fluctuation of an amplitude of the received signal.
A flowmeter using this method was constructed and tested. It has been proved that this method is effective to consistently measure propagating time in the disturbed flow compared with the conventional method using a single wave.抄録全体を表示PDF形式でダウンロード (674K) -
秋山 浩二, 大手 明1987 年 23 巻 6 号 p. 570-575
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーA novel transducer with optical-fiber data link-to provide electrical isolation and immunity from electromagnetic noise-has been developed. A pulse-position (or pulse-frequency) modulated optical signal is transmitted by optical fiber from a remote converter to the mainframe. Light of a different wavelength is transmitted via the same optical fiber from a laser in the mainframe to a photocell battery in the remote converter, to power it. Signal and “power” light beams are separated by dichroic mirrors. A practical thermocouple converter and a tuning-fork converter for sensors are described; they consume only 84μW and 96μW respectively. An optical to pnuematic converter for a valve actuator is also described; it consumes only 280μW. These converters are powered by light from a 5mW semiconductor laser in the mainframe.抄録全体を表示PDF形式でダウンロード (2753K) -
宮里 義彦, 大島 康次郎1987 年 23 巻 6 号 p. 576-583
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーRecently there have been several results in the field of learning control or repetitive control. These are intended to control certain mechanical systems such as robot manipulators. But most of them are restricted to specific systems or systems of almost known parameters. This is because of the schemes of the control systems, which are a kind of servocompensator or are constructed with the simple P-D controller.
This paper deals with the problem of constructing learning control for unknown systems. The problems stated before, are solved by introducing parameter adaptation schemes.
First we describe repetitive control problems as a kind of Attasi-type two-dimensional systems. Then we design model reference adaptive control systems for these two-dimensional systems and construct learning control systems simultaneously. However these are different from those stated before in the point that adaptive parameters are adjusted by use of the overall state variables on each time interval. In this sense the proposed learning control systems are a kind of hybrid adaptive control systems.抄録全体を表示PDF形式でダウンロード (937K) -
Katsutoshi TAMURA, P.N. NIKIFORUK, Yoshikuni SUZUKI1987 年 23 巻 6 号 p. 584-589
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーA design of an indirect MRACS for MIMO plants is presented. The structure of the MRACS is simple and the calculation of the adaptive control input is straightforward. The number of the parameters to be identified in the MRACS is minimum. The stability of the MRACS is assured under the standard assumptions. A numerical simulation is given to show the effectiveness of the MRACS.抄録全体を表示PDF形式でダウンロード (558K) -
周波数領域における近似解の収束杉本 謙二, 山本 裕1987 年 23 巻 6 号 p. 590-596
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーThis paper studies an approximation method for solving the LQ optimal regulator problem for retarded systems. To obtain the optimal control, this method introduces a series of finite-dimensional approximation systems of the original system by the averaging scheme. It is proved that the closed-loop transfer function of the approximation system converges to that of the original closed-loop system. The proof makes full use of the Kalman equation from the complex-analytic point of view.抄録全体を表示PDF形式でダウンロード (827K) -
状態フィードバック則の一構成法示村 悦二郎, 内田 健康, 久保 智裕1987 年 23 巻 6 号 p. 597-603
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーA design method to construct a linear state feedback law for systems with delays in states is proposed; the feedback gain is given from the maximum solution to a Riccati equation for systems with delays. The proposed method has the following features: (i) Poles of the resulting closed loop system are a priori calculated from the open loop poles and the “turn over” line which is a scalar design parameter, so that we can choose the parameter to locate poles on desired points which guarantee desired degree of exponential stability. (ii) The closed loop system is a linear quadratic regulator for a certain criterion, so that it satisfies the circle condition and thus has a good robustness property.抄録全体を表示PDF形式でダウンロード (884K) -
近藤 英二, 清田 高徳, 須永 照雄1987 年 23 巻 6 号 p. 604-610
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーThis paper discusses a systematic design of a deadbeat state observer for a discrete-time linear time-invariant system. A general form of the deadbeat state observer is obtained, and the freedom of design is shown explicitly. All possible nilpotent Jordan matrices which are similar to the system matrix of the deadbeat state observer are derived, and then all possible finite settling times are obtained. The optimal deadbeat state observer is obtained by minimizing the overshoot of the estimation error. Finally, examples are given to show the effectiveness of the proposed design method.抄録全体を表示PDF形式でダウンロード (833K) -
砂原 善文, 森田 洋二, 安田 寿彦, 西上 秀基1987 年 23 巻 6 号 p. 611-618
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーDynamic behavior of a class of discrete predator-prey systems is considered, where a control input representing harvesting and/or supplying of the predator is taken into account. First, stability properties of fixed points of the predator-prey system are studied. Secondly, the existence of chaotic behavior is explored, based on Marotto's theorem and the concept of Lyapunov exponents.
Through two aspects of studies considered, it is shown that the value of control input can be determined in order to change the oscillating system state into the equilibrium one, where without control input the system state is allowed to behave periodically, in a limit cycle, or even chaotically. An increase of the harvest of predator leads to the stable state of the system considered, while an increase of supply of predator to some extent makes the system state unstable or chaotic, and further increase of supply implies the stable equilibrium state.
Numerical experiments are carried out for various values of parameters, giving the validity of the analysis in this paper.抄録全体を表示PDF形式でダウンロード (1303K) -
安藤 繁1987 年 23 巻 6 号 p. 619-624
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーPurpose of this paper is to extend the differential stereo vision algorithm so that it can be used even if left and right intensity levels differ from each other because of camera sensitivity mismatch and/or non-Lambertian surface reflectance. From a multiplicative model of intensity difference, a differential grayness relation including interocular positional disparity (IPD) and interocular intensity disparity (IID) is derived. Applying local least-squares methods to this identity, we obtained a set of efficient local operations to compute the maps of the IPD and IID. From these results, an equation which relates the IID map to a surface reflectance function are derived under assumptions of its spatial uniformity and a parallel incident light. The IID map as well as good satisfaction of this equation are emphasized to be reliable source of binocular luster perception by computer. Experiments for performance tests and applications of this method to image feature extraction and reflectance function identification are shown.抄録全体を表示PDF形式でダウンロード (2162K) -
Koichi MIZUKAMI, Hansheng Wu1987 年 23 巻 6 号 p. 625-632
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーThis paper mainly is concerned with the derivation of the sufficient conditions for the two-level incentive stackelberg strategies in the two-level hierarchical differential games with two noncooperative leaders and one follower, characterized by a kind of linear state dynamics and quadratic cost functionals. In the present paper, we first define a concept of “team-optimal Nash equilibrium solution”, and by a simple numerical example, show a general method solving such a static two-level incentive game in which two leaders find their “team-optimal Nash equilibrium solution” by announcing their strategies. Then, we construct the two-level incentive Stackelberg strategies γ1∈Γ1 and γ2∈Γ2 of the formγ1(x(t), u31(t), t)=η10(t)x(t)+η11(t)u31(t), γ2(x(t), u32(t), t)=η20(t)x(t)+η22(t)u32(t), for the players P1 and P2 (leaders) to achieve their “team-optimal Nash equilibrium solution” in such a game characterized by a kind of linear state dynamics and quadratic cost functionals, and also obtain the sufficient conditions which are satisfied by these two-level incentive Stackelberg strategies γ1∈Γ1 and γ2∈Γ2.抄録全体を表示PDF形式でダウンロード (945K) -
速度計測における可変性の検証稲垣 慎太郎, 山浦 富雄, 小林 彬1987 年 23 巻 6 号 p. 633-635
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (1340K) -
岡田 英史, 南谷 晴之1987 年 23 巻 6 号 p. 636-638
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (381K) -
東島 英輔, 佐藤 拓宋1987 年 23 巻 6 号 p. 639-641
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (293K) -
関 享士郎, 志田 純一, 村上 孝一1987 年 23 巻 6 号 p. 642-643
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (264K) -
米谷 昭彦, 橋本 芳宏, 戸苅 吉孝1987 年 23 巻 6 号 p. 644-646
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (346K) -
小原 敦美, 北森 俊行1987 年 23 巻 6 号 p. 647-649
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (392K) -
姜 根澤, 菅野 道夫1987 年 23 巻 6 号 p. 650-652
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (400K) -
築山 誠1987 年 23 巻 6 号 p. 653-655
発行日: 1987/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (458K)
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