巻号一覧
17 巻, 7 号
選択された号の論文の15件中1～15を表示しています
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木村 丈治, 高橋 進一1981 年 17 巻 7 号 p. 701-706
発行日: 1981/10/30
公開日: 2009/03/27
ジャーナル フリーThis paper shows necessary and sufficient conditions for the solvability of the block decoupling problem by using the concept of interactor.
We first propose a method that state feedback and input transformation are directly derived from the relation of the open-loop transfer function matrix with relatively right prime factrization and the closed-loop transfer function matrix. Secondly, we introduce an unique lower left trianglar matrix, an interactor, which is defined by Wolovich and Falb, and define a lower left trianglar matrix which has similar qualities of interactor. Finally, we show our method for solving the block decoupling problem. The most advantage of our technique is that the transfer function matrices of subsystems in the block decoupled system always become the lower left trianglar matrices.抄録全体を表示PDF形式でダウンロード (672K) -
平田 廣則1981 年 17 巻 7 号 p. 707-712
発行日: 1981/10/30
公開日: 2009/03/27
ジャーナル フリーThis paper proposes a mass and energy flow model of hierarchical ecosystems having plural number of species in each level based on a previous model having only one species in each level and maximum entropy principle.
We study the relation between hierarchy in energy per unit biomass and mass circulation, i. e., under what conditions of energy per unit biomass hierarchical structure (foodweb) is organized, and also its stability.抄録全体を表示PDF形式でダウンロード (616K) -
近田 毅彦, 古田 勝久1981 年 17 巻 7 号 p. 713-720
発行日: 1981/10/30
公開日: 2009/03/27
ジャーナル フリーThis paper is concerned with the feasibility study of the multivariable control system design by the state space approach. A magnetic levitation mechanism with two control variables is experimentally constructed. For this unstable system, a control system is designed based on the state space approach and is implemented by a minicomputer. And from the behavior of the control system, the effectiveness of the approach is proved. The control system is designed by the combination of the optimal control and the decoupled control in order that the interaction of the reference signals is minimized without spoiling the total performance. The criterion of the optimal control is determined by assigning the eigenvalues and eigenvectors appropriately, which eliminates the try and error procedure in the determination of the criterion function.
To implement the control system based on the continuous control theory by a degital computer, it is pointed out that a certain transformation of the feedback control law must be done.
Thus this paper presents a practical procedure how to design and implement a control system designed based on the state space approach, and the experimental results are shown.抄録全体を表示PDF形式でダウンロード (1240K) -
ゲーム理論によるアプローチ田村 坦之, 鈴木 尋仁1981 年 17 巻 7 号 p. 721-727
発行日: 1981/10/30
公開日: 2009/03/27
ジャーナル フリーThis paper deals with a simple game theoretic model in total emission control of regional environmental pollution. It is assumed that upper limit of total amount of pollution emitted in a regional area is given. The problem is how to allocate this total amount to each polluter for obtaining consensus among the game players, that is, control agency and polluters.“Social benefit” and “impartiality” are considered as the criteria for allocation. Especially, for attaining “impartiality” a new concept of “equal individual satisfaction” is proposed for solving characteristic function games.抄録全体を表示PDF形式でダウンロード (1015K) -
ウーウォン ウィラー, 小林 重信, 市川 惇信1981 年 17 巻 7 号 p. 728-734
発行日: 1981/10/30
公開日: 2009/03/27
ジャーナル フリーInteractive methods for solving the discrete multi-objective programming problems are proposed and examined in this paper.
The ε constrained method is first investigated to see how it works for finding all non-inferior solutions in the discrete vector optimization problem. Then a new type of the maximum component minimization method is presented. The method differs from the conventional one in the sense that instead of assigning the weighting coefficients of the objective functions the goal values of the objective functions are introduced as the parameters to find the non-inferior solutions.
Two interactive algorithms are proposed in this paper to select the decision-maker's preferred solution among all the non-inferior solutions. The first algorithm, which is only good for the two objective functions problem, utilizes the dichotomous method to find the best parameter values in the ε constrained method. The second algorithm, which is good for the more than three objective functions problem, utilizes the pattern search method for the search in the parameter space in the maximum component minimization method.
The both algorithms require the decision-maker only to do the pairwise comparisons of the non-inferior solutions in the objective function space. To verify the practical usefulness of the proposed two methods, several computational experiments are conducted on the illustrative examples.抄録全体を表示PDF形式でダウンロード (1060K) -
川又 政征, 樋口 龍雄1981 年 17 巻 7 号 p. 735-741
発行日: 1981/10/30
公開日: 2009/03/27
ジャーナル フリーWhen digital signal processing operations are implemented on a computer or with special-purpose hardware, errors due to finite word length are unavoidable. Most of the literatures dealing with finite word length effects in recursive digital filters have studied limit cycles and roundoff errors separately. This paper studies a systematic approach to synthesize limit cycle-free digital filters with minimum noise gain. A sufficient condition for the absence of limit cycles including overflow oscillations is given for the class of fixed-point digital filters described by the state equations, and the constraint for the transformation matrix to synthesize limit cycle-free digital filters is obtained. The problem of noise minimization subject to the constraint that guarantees the absence of limit cycles is easily formulated, since asymptotic stability of the actual digital filter is invariant under diagonal and orthogonal transformations. A method of realizing limit cycle-free digital filters with the local minimum of the noise gain is given, and a numerical example is shown to illustrate the computational procedure. The noise gain of the limit cycle-free digital filter synthesized here is nearly equal to that of the minimum unit noise digital filter by Hwang that can not guarantee the absence of limit cycles.抄録全体を表示PDF形式でダウンロード (819K) -
原 辰次1981 年 17 巻 7 号 p. 742-748
発行日: 1981/10/30
公開日: 2009/03/27
ジャーナル フリーThis paper considers the problem of synthesizing linear multivariable servo systems which retain internal stability and output regulation in the presence of specified plant parameter perturbations. A necessary and sufficient condition of output regulation and conditions for existence of a pre-compensator such that the composite system of this and the given plant is observable and satisfies the output regulation criteria are given. The minimal order of such pre-compensator and an algorithm for the minimal-order pre-compensator synthesis are presented. A design procedurc of linear multivariable servo systems with parameter perturbations which consists of the pre-compensator and stabilizer synthesis is shown.抄録全体を表示PDF形式でダウンロード (843K) -
砂原 善文, 相原 伸一, 石川 昌明1981 年 17 巻 7 号 p. 749-755
発行日: 1981/10/30
公開日: 2009/03/27
ジャーナル フリーThis paper is concerned with the state and free boundary estimation problem of distributed parameter systems with stochastic free boundary.
First, the mathematical model of stochastic distributed parameter system is formulated by the stochastic variational inequality of evolution in Hilbert space and, furthermore, the existence theorem of the solution is established.
Secondly, both the state and free boundary estimation equations are derived by using the martingale and innovation approaches.
Finally, for the purpose of interpreting the general theory, procedures to obtain sample runs of the state and free boundary estimates are explained with digital simulation results.抄録全体を表示PDF形式でダウンロード (858K) -
大里 有生, 関口 隆1981 年 17 巻 7 号 p. 756-763
発行日: 1981/10/30
公開日: 2009/03/27
ジャーナル フリーIn this paper we propose some new methods to solve the polynomial form of composite fuzzy relational equations represented in the form of ∪i=1I(A(i)_??_X_??_B(i))=C or ∩i=1I(A(i)ΔX-ΔB(i))=C for the unknown fuzzy relation X, where A(i), B(i), C are the given fuzzy relations, and _??_, Δ denote the operations of max-min, min-max compositions, respectively.
Several methods to solve the monomial form of composite fuzzy relational equations, which in general represented in the form of A*X=B, were formerly presented by E. Sanchez in 1976 and Y. Tsukamoto in 1979, and have been fully giving the availabilities to the various fields of practical applications, such as the fuzzy medical diagnosis, fuzzy failure diagnosis, fuzzy control problem and fuzzy information processing. However, when needed to approach to the more complex fuzzy system and to represent the system more in detail, we must face with the polynomial form of composite fuzzy relational equations representing the system. Then it arises that the former methods for the monomial form can not be directly applied to the method of solving the polynomial form of composite fuzzy relational equations.
In this paper we show the methods to resolve the polynomial form into the monomial form by the equivalent simplification based on the direct product operations of fuzzy relations and the equivalent decomposition, and to obtain the solutions to the polynomial form of composite fuzzy relational equations on the basis of Sanchez's method of inverse operations to the monomial form. Several numerical examples are presented in order to show the effectiveness of the methods of solving th polynomial form of composite fuzzy relational equations.抄録全体を表示PDF形式でダウンロード (1027K) -
本多 敏, 山崎 弘郎1981 年 17 巻 7 号 p. 764-769
発行日: 1981/10/30
公開日: 2009/03/27
ジャーナル フリーRegular vortex shedding from bluff bodies in fluid flow has been used for flow measurement. Since unsymmetric 2-dimensional vortex streets only are stable in uniform flow, “2-dimensional bluff bodies” which have constant width and uniform cross sections are used for the vortex generator in almost all practical vortex flowmeters. Flow velocity profile in a pipe is neither uniform nor 2-dimensional. Generally, such a 3-dimensional flow destroys regular vortex shedding. Therefore, various shapes of bluff bodies are developed experimentally.
In this paper, a general condition for regular vortex shedding in a 3-dimensional flow is proposed: local shedding frequency must remain constant along the span of the bluff bodies. The local shedding frequency is proportional to the ratio of the local velocity to the local width of bluff body, and the nondimensional coefficient is called Strouhal number. This condition requires the constant ratio of local velocity to local width. A uniform velocity profile (2-dimensional flow) is a special case to meet the condition. Consequently, new vortex generators with 3-dimensional shape which satisfy the condition in pipe flow are obtained. As experimental results, new generators give stronger and more regular vortex shedding. This improvement confirms the condition to be right. Furthermore, it may be applied to shed regular vortices in arbitrary 3-dimensional flow.抄録全体を表示PDF形式でダウンロード (883K) -
清水 顕, 和田 力1981 年 17 巻 7 号 p. 770-776
発行日: 1981/10/30
公開日: 2009/03/27
ジャーナル フリーFor a wall-reattachment amplifier with activated opposite control flow, we have not yet gotten sufficient experiemental data of reattached jet flow and a reasonable theoretical model. The investigation of flow behaviors in such a amplifier may be primitive for dealing with a signal transfer in the circuits using these ampliers, as well as flow behavior itself.
In this report, the above mentioned flow behaviors have been investigated by experiments using a large scale model and author's theoretical approach proposed already. The results obtained are summerized as follows:
(a) The relation between a relative control total pressure and a relative control flow rate, which has already known experimentally, may characterize the three interacting jet flows. This relation can be evaluated by author's theoretical approach.
(b) The relative switching control flow rate may be independed on the opposite flow and constant for a contacting-bothwalls switching, while for a terminatedwall switching such an independency is not valid. This can be explained by the reattached jet flow behavior.抄録全体を表示PDF形式でダウンロード (2292K) -
貝塚 洋1981 年 17 巻 7 号 p. 777-779
発行日: 1981/10/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (416K) -
古川 敏雄, 示村 悦二郎1981 年 17 巻 7 号 p. 780-782
発行日: 1981/10/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (355K) -
湯浅 康弘, 久村 富持1981 年 17 巻 7 号 p. 783-785
発行日: 1981/10/30
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) -
1981 年 17 巻 7 号 p. 787
発行日: 1981年
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (68K)
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