摘要:

A feedback controller for maintaining the concentration of dissolved oxygen (DO) at a specified level in a single stretch of a non-tidal river stream polluted by effluents is described. The control signals are artificial instream aeration and rate of effluent discharge. An observer is used to estimate the incremental changes in the down stream biochemical oxygen demand (BOD) from a knowledge of the output DO and upstream DO and BOD. This estimate and the output DO are used to generate the control signals. Computer simulation results are included. A comparison of these results with those obtained earlier by mentis of n constant gain output feedback control (Gouriahankar and Ramur 1077) indicates that the present scheme enables greater quantities of effluents to be discharged for the same upstream disturbances.

ISSN:0020-7721    

DOI:10.1080/00207727708942095

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

This paper is concerned with an asymptotically more efficient nonlinear state estimation scheme based on the stochastic approximation procedure

ISSN:0020-7721    

DOI:10.1080/00207727708942096

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

This paper introduces find exemplifies discrete weighted residual methods (DWRM's) for the approximate solution of discrete boundary-value problems in ordinary and partial difference equations. The solution of the discrete boundary-value problem is approximated by a linear combination of known functions with undetermined coefficients. DWRM's specify procedures for determining these coefficients as the solution of a. system of algebraic equations

ISSN:0020-7721    

DOI:10.1080/00207727708942097

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

A fairly general class of decision-making problems has been investigated in which two or more players compete to satisfy the demand for a particular commodity in a manner that will minimize their own individual costs. A situation of imperfect competition without negotiation has been assumed, which leads to a series of nonzero-sum games that must be solved. A short discussion of some of the important properties of the minhnax and Nash solution strategies for non-zero-sum games has been included. Finally, the game solution strategy is incorporated into a dynamic equation to form a solution technique for decision-making problems involving competition.

ISSN:0020-7721    

DOI:10.1080/00207727708942098

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The paper deals with a deterministic case of the identification problem of static complex systems with hierarchical structure, in which the globally optimal model of the whole system as a hierarchical configuration of models of individual subsystems is obtained

ISSN:0020-7721    

DOI:10.1080/00207727708942099

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

A simple instrumental variable identification algorithm is proposed which uses binary shift register sequences as both system inputs and as instrumental variables. The algorithm is recursive and hence may be used for on-line identification; further it yields two algorithms which are directly implementable for multi-input—multi-output system identification. The results of several computational experiments are presented.

ISSN:0020-7721    

DOI:10.1080/00207727708942100

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

By introducing the notion of logarithmic norm for random matrices, stability conditions are given for systems of linear differential equations with random parameters.

ISSN:0020-7721    

DOI:10.1080/00207727708942101

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Some graphical sensitivity reduction, tests for time-invariant linear and non-linear feedback systems are presented. These tests are useful in a number of engineering problems where one needs to analyse the sensitivity behaviour of a multivariate plant which has been modified by the introduction of a 1-input-l-output feedback compensator. They are based on a Nyquist. plot and describing-function techniques and involve little extra effort in addition to that which is usually required to determine stability. The modalities of application are particularly well suited for the analysis of power systems control loops. They are illustrated via the analysis of the effect of introducing a frequency-voltage intercoupling in the control system of an isolated hydroelectric power plant.

ISSN:0020-7721    

DOI:10.1080/00207727708942102

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor