巻号一覧
21 巻, 6 号
選択された号の論文の22件中1～22を表示しています
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潮 俊光, 平井 一正1985 年 21 巻 6 号 p. 539-545
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーIn this paper, sufficient conditions for the chaos in pulse-width modulated (PWM) feedback systems are investigated by using Shiraiwa-Kurata's Theorem.
The PWM has such characteristic that its output is a pulse whose width depends on an absolute value of its input at the sampling instant. Since the maximum pulse width is equal to the sampling period, the saturation of the pulse width occurs when the absolute value of the input is large. This nonlinear characteristic causes various nonlinear phenomena such as limit cycle, chaotic behavior, and so on. Baillieul et al studied the chaos in PWM feedback systems. In their paper, however, conditions for the linear elements are strict, and the relationship between the chaos and the sampling period has not been investigated. This paper makes it clear the relationship between the chaos and the sampling period. That is, it is proven that PWM feedback systems are chaotic for any sufficiently large sampling period if the linear elements have at least one unstable mode and if a certain inequality is satisfied.抄録全体を表示PDF形式でダウンロード (825K) -
守末 利弥1985 年 21 巻 6 号 p. 546-549
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーOn the irreducible Jordan form realization of a rational transfer function matrix, Gilbert established an elegant method which is applicable to a rational matrix having simple poles. Kalman used the Smith-McMillan form to give a generalization of Gilbert's technique. For a rational matrix in which every denominator is given in the factored form, Gueguen, Toumire, Panda and Chen developed a two-step method which is more effective than Kalman's general method.
This paper presents a new method for realizing a rational transfer function matrix into an irreducible Jordan canonical form state eqution. This method consists of a single step to form a controllable and observable state equation, and is simpler and more beautiful than the two-step method. This technique is a direct generalization of Gilbert's technique.抄録全体を表示PDF形式でダウンロード (388K) -
田口 亮, 堀口 和己, 浜田 望1985 年 21 巻 6 号 p. 550-556
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーIdentification of the plants is not an easy task especially in the fields of process control. From this point of view, Kitamori developed a method of control system design based upon partial knowledge about controlled processes. However, it is difficult to control the oscillatory plant by Kitamori's control system design method. Because the Kitamori's partial knowledge is preferential in lower frequency range, then the higher order differential controller is needed for the oscillatory plant. Also there is a practical difficulty with the one. Besides, considering the knowledge of higher frequency about the controlled plant corresponds to increasing in controller's order.
In this paper, we develop a method of control system design, which have the following properties (1)-(3) in order to improve the above defects.
(1) Designed controller is given as a practical real rational transfer function.
(2) Closed loop characteristics are designed to match the desire model up to as higher frequency as possible, by means of varying limited parameters of controller.
(3) We guarantee the controller stability. (It is not always required)
Design methods for the PID type and I-PD type control systems are derived, and some results show the effectivenss of the methods. In the last chapter it is briefly mentioned the metod is applied to sampled-data control systems.抄録全体を表示PDF形式でダウンロード (713K) -
砂原 善文, 相原 伸一, 小島 史男1985 年 21 巻 6 号 p. 557-562
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーThis paper is concerned with theoretical and computational aspects of a method for identifying the boundary shape of distributed parameter systems under noisy observations. First, the system model is given by a partial differential equation of parabolic type derived by a known distributed input. Noisy observations are made by sensors allocated on known subregions of the system. Secondly, based on the concept of the maximum likelihood estimate, an estimation algorithm is presented in a form of the recursive computation. Convergence properties of the estimated process are discussed by using the stochastic stability theory. Finally, the validity of the proposed estimation algorithm is shown through results of digital simulation experiments.抄録全体を表示PDF形式でダウンロード (684K) -
石川 昌明, 砂原 善文, 相原 伸一1985 年 21 巻 6 号 p. 563-568
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーThis paper is concerned with state estimation problems for a class of stochastic pseudoparabolic systems under noisy observation.
First, with in the framework of function spaces, the existence and uniqueness properties of the solution to the state equation are studied.
Secondly, dynamics of the least square estimator is given under noisy observations.
Finally, with showing results of digital simulation experiments, practical implementation algorithm of the estimator dynamics is proposed with the aid of the finite difference method with respect to time and spatial variables.抄録全体を表示PDF形式でダウンロード (663K) -
真山 紀1985 年 21 巻 6 号 p. 569-575
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーAn approximation method for cutting off a moment hierarchy in moment-calculations by the master equation is studied based on a Poisson distribution.
A condition of requiring a Poisson distribution is presented in terms of transition rates. This report proposes a simple model for transition rates that are quadratic in terms of a random variable and permit transitions only between each state (0, 1, 2, …) and the nearest. Using this model, the method is explained. The first two order moments are obtained for the steady state as time t tends to infinity. The approach is applied to the study of a traffic flow.抄録全体を表示PDF形式でダウンロード (738K) -
増田 達也, 藤井 克彦1985 年 21 巻 6 号 p. 576-583
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーOne of the important problems in system structure's analysis is how to modify strongly connected structures to partial order structures that have no cycles. The partial order structuring can be realized by either of edges cut or vertices partition. This parper deals with the latter partial order structuring problem. The problem is formulated into a 0-1 linear programming problem with l variables and m constraints, where l and m are the number of vertices and cycles, respectively, in the strongly connected structure. To solve the 0-1 linear programming problem, we develop a solution algorithm based on the concept of relaxation strategy. This algorithm has an excellent ability on calculation efficiency. Consequently, this algorithm can be easily applied to the partial order structuring problem of the large-scale strongly connected structure which has a large number of vertices and cycles. The effectiveness of the algorithm is demonstraited by applying this to a routing problem of building block tyep LSI.抄録全体を表示PDF形式でダウンロード (1043K) -
杉本 富利, 本多 中二1985 年 21 巻 6 号 p. 584-591
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーBy using the Polar Fourier Series Graph (PFSG)-a graphical representation of multidimentional data, one can easily distinguish the similarity or the difference of the characteristics of the data. This is due to the fact that the PFSG's figure has easily distinguishable features, and it is represented as a smooth and closed curve. On the other hand, each component of multidimensional data can not be explicitly represented on the figure's shape of the PFSG, and it is therefore impossible to read the degree of the data and its component from the curve. This becomes a great problem if one wants to use the PFSG for several purposes in any multidimensional data application.
This paper proposes a graphical representation of multidimensional data which solves the problem mentioned above along with the use of the performance of PFSG. In the representation, each component of the data can be directly expressed by linking it to some figure's geometrical feature. Applications for communication media in man-machine system are performed to show the efficiency of the method.抄録全体を表示PDF形式でダウンロード (1051K) -
五十嵐 智, 阿刀田 央一, 本多 庸悟1985 年 21 巻 6 号 p. 592-599
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーA class of textures are modeled as signals from ‘strewing processes’ in which elements with a certain pattern, or ‘pattern elements’, are strewn or heaped in succession. On the basis of the theoretical consideration of the model, a method is proposed for extracting features of pattern elements constructing the textures. In conventional approaches, random textures have often been taken as Gaussian process and analyzed based on the 2nd-order statistics. On the contrary, because strewing-textures are non-Gaussian, some higher order statistics may contain significant information.
In this paper, a method for analyzing such textures is proposed based on the 3rd-order autocorrelation function in three specific cross-sectional planes, by which one can guess whether the shape of pattern elements is bar-like, disk-like, ring, or periodical. The results of experiments on typical strewing-textures and heaped chip images show the effectiveness of the method.抄録全体を表示PDF形式でダウンロード (3061K) -
花泉 弘, 藤村 貞夫, 椿 広計, 豊田 弘道1985 年 21 巻 6 号 p. 600-605
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーAn algorithm for reduction of pulse noises in a scanner (1-dimensional) data is proposed. It is assumed that there is no pulse signal in the data. The algorithm consists of two procedures, that is, noise ‘detection’ and noise ‘reduction’ procedures. The former is based on the fact that the mean value of the data including pulse noises is different from that without them. The difference (therefore the noise) is detected by the statistical t-test on the null hypothesis that the mean values of two sets of data are equal. The criterion for the detection is derived from the statistics for the t-test.
Two kinds of non-linear adaptive noise reduction procedures are proposed here. They are adaptive because they are applied only if the noise is detected. In addition, one of them applies an averaging or a median filter adaptively to the property of the signal, also.
The validity of the algorithm is experimentally confirmed by simulation. The application of the the algorithm to 2-dimensional data is also shown.抄録全体を表示PDF形式でダウンロード (1616K) -
鈴木 孝雄, 大月 正男, 円居 繁治, 山田 興1985 年 21 巻 6 号 p. 606-612
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーIn this paper, the problems of two types of floated pendulum accelerometers formerly developed by the authors were first discussed. In one of the accelerometers the pendulum in a cylindrical float was supported with pivots and jewels of the output axis, and in the other accelerometer by means of magnetically centering technique. In order to solve the problems, a Flexure Hinged Pendulum Accelerometer (FHPA) was developed, in which a flat-shaped pendulum was supported with a pair of friction free flexure hinges.
This paper describes the principle of operation, goal accuracy, design of the main components (pendulum, pick-off, torquer, damper, and servo amplifier) and also the results of the performance tests. The selected performances and characteristics are as follows: resolution 6×10-7g, range ±30g, 1g linearity 2.8×10-5g, g2 error coefficient 1.9×10-5g/g2, short term null torque stability 3.3×10-6g, moment of inertia 7.0g-cm2, characteristic time of the pendulum 3.26×10-6sec.抄録全体を表示PDF形式でダウンロード (904K) -
森山 峻, 小林 稔, 大石 秀夫1985 年 21 巻 6 号 p. 613-618
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーOne of authors have developed a pulverized coal injection system into blast furnaces (KDP-1) based on 1:n plural blow tank distributing and fluidics control method without any mechanical devices.
The authors present the efforts of the dividing mass flow rate control method based on the test of dividing control in transport pipe by fluidics control.
The pneumatic two phase flow control method is successful and is proved that the control mass model is same as above mentioned blow tank distributing mass model.
The authors predict dynamic simulation for multi phase flow is possible by four variable (pressure, gasflow rate, liquid flow rate and solid flow rate) transfer matrix and multi phase flow impedance.抄録全体を表示PDF形式でダウンロード (627K) -
中野 道雄, 今井 祥人1985 年 21 巻 6 号 p. 619-623
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーMethods for improving transient characteristics of positioning servomechanism have been often studied both from theoretical and practical aspects.
In this paper, the authors propose a new method to improve the characteristics by focusing on the response rather than the transfer function of the system. Namely, even in the case of the servomechanism with unknown transfer function, by way of introducing the concept of learning, by constantly looking at the response in adjusting process the system, it was proved possible to realize an ideal transient response with outstanding performance in terms of rapid response.
Specifically, the finite time response is to be ultimately obtained by correcting the height of bang-bang element in the velocity feedback loop by the overshoot value or the undershoot value of the step response.
The author, by applying this method to the positioning control system using a stepping motor, was able to obtain the ideal respopse with no overshoot, notwithstanding the complicated mathematical model of a stepping motor itself.抄録全体を表示PDF形式でダウンロード (540K) -
阿部 稔, 金子 真, 西沢 昭一郎1985 年 21 巻 6 号 p. 624-631
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーAlthough legged locomotion machines equipped with three active degrees of freedom per each leg possess great flexibility on irregular terrain, such machines need very complicated software in controlling and coordinating leg motion. As a result, such machines perform awkwardly except a particular legged machine even when they walk on a flat plane and although they have flexible mechanism, multi-functioned walkings are not realized under the existing circumstances.
Under these circumstances, the authors propose such a fixed gait type legged machine (MELWALK MARK-III) as can attain two dimensional walking and terrain adaptability. In this particular model, the fixed gait (alternating tripod gait) is realized by only one active degrees of freedom using an approximate straight-line mechanism and seven other active degrees of freedom are added for two dimensional walking and terrain adaptability. Mechanism and basic control system on the proposed legged machine are described precisely with the comparison of conventional machines equipped with three active degrees of freedom per each leg.
Experiments are carried out to certify the basic movements and the simplicity of control algorithm. In order to check the dynamic effectiveness, the specific resistance and the payload limit are also measured. Several features of the proposed legged machine are revealed through these experiments.抄録全体を表示PDF形式でダウンロード (1860K) -
河野 通夫1985 年 21 巻 6 号 p. 632-634
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (347K) -
井前 讓, 箱守 京次郎1985 年 21 巻 6 号 p. 635-637
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (342K) -
小俣 透, 中野 道雄1985 年 21 巻 6 号 p. 638-640
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (343K) -
小野 治1985 年 21 巻 6 号 p. 641-643
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (875K) -
原 辰次, 香取 英夫1985 年 21 巻 6 号 p. 644-646
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (399K) -
新中 新二, 鈴木 隆1985 年 21 巻 6 号 p. 647-649
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (349K) -
藤井 省三, 水野 直樹1985 年 21 巻 6 号 p. 650-652
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (380K) -
盧 度煥, 山浦 富雄, 小林 彬1985 年 21 巻 6 号 p. 653-655
発行日: 1985/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (370K)
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