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Decision and Control including the 14th Symposium on Adaptive Processes, 1975 IEEE Conference on

Date 10-12 Dec. 1975

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Displaying Results 1 - 25 of 190
  • [Front cover and table of contents]

    Publication Year: 1975, Page(s): c1
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    Freely Available from IEEE
  • Foreword

    Publication Year: 1975, Page(s): iii
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    Freely Available from IEEE
  • The basics of seismic data processing

    Publication Year: 1975, Page(s): 1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (61 KB)

    The eight papers which follow this one are devoted to processes for extracting from seismic data signals having the maximum signal-to-noise ratio the data permit or to methods of deducing from the processed signals the subsurface responsible for them. In this paper I shall review briefly those characteristics of the signals and of the various types of noise which motivate the several processes. View full abstract»

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  • Techniques for the deconvolution of seismic signals

    Publication Year: 1975, Page(s):2 - 8
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (543 KB)

    It is commonly assumed that a reflected seismic signal consists, at least in part, of a convolution of the earth reflectivity function with a propagating "wavelet". The purpose of "deconvolution" is to separate the wavelet from the reflectivity function, or to at least change the form of the wavelet to one which is more desirable. This paper describes methods which have been applied or proposed fo... View full abstract»

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  • Process and information in economic models of markets

    Publication Year: 1975, Page(s):9 - 12
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (289 KB)

    The theme of this essay is simple: what economic equilibrium is in a particular market (structure) depends on what individuals and firms know and how they react in disequilibrium processes to information imperfectly available in that market. Three simplified cases are used to demonstrate this point. The cases technically are shown to be related to the kinds of analyses common in System Theory. Fro... View full abstract»

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  • Role of control and system theory in economics

    Publication Year: 1975, Page(s):13 - 15
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (194 KB)

    While it is no doubt appropriate for this panel to discuss a subject as extensive as the role of control and system theory in economics, prudence requires that I pursue a somewhat more modest objective. Consequently I shall confine my remarks to the application of control theory to macroeconomies, and more narrowly yet to short run macroeconomic policy. The subject area remains vast, of course; pe... View full abstract»

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  • Adaptive control in economics

    Publication Year: 1975, Page(s): 16
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (81 KB)

    The following definition of Economics is given by P. A. Samuelson: "Economics is the study of how men and society choose, with or without the use of money, to employ scarce productive resources, which could have alternative uses, to produce various commodities over time and distribute them for consumption, now and in the future, among various people and groups in society." Thus the study of econom... View full abstract»

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  • Role of control and system theory in economics

    Publication Year: 1975, Page(s):17 - 19
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (211 KB)

    It is argued that the interests of control and system theorists can be divided into two sets: the technical interests labeled Control Theory and the "System" interests called Cybernetics. It is suggested that unique contributions to economics can only come from Cybernetics. View full abstract»

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  • Monotone mappings in dynamic programming

    Publication Year: 1975, Page(s):20 - 25
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    In this paper we consider a class of monotone mappings underlying many sequential optimization problems over a finite or infinite horizon which are of interest in applications. This class of problems Includes deterministic and stochastic optimal control problems, minimax control problems, Semi-Markov Decision problems and others. We prove some fixed point properties of the optimal value function a... View full abstract»

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  • Singular regimes in certain classes of relaxed control problems

    Publication Year: 1975, Page(s):26 - 31
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (463 KB)

    We present new necessary conditions for a relaxed minimum in optimal control problems defined by certain classes of ordinary differential equations. These necessary conditions may be helpful in computing singular extremal arcs, in determining when these arcs are "strictly relaxed", and in defining regions of the state space that contain nonsingular extremal arcs only. View full abstract»

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  • Sufficient conditions for free final time optimal control problems

    Publication Year: 1975, Page(s):32 - 37
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    A general sufficient condition for global optimality in terms of inequalities between the functions involved in the definition of the problem is developed. This condition is an extension of the sufficient condition obtained by Leitmann and Stalford [6] and can handle problems with constraints on the control and/or the state as well as problems with free final time. Simplified forms are obtained fo... View full abstract»

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  • Asymptotic series solution of singularly perturbed free time optimal control problems

    Publication Year: 1975, Page(s):38 - 42
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Optimal control of singularly perturbed systems with free terminal time is considered. A reduction in system order is achieved by perturbing a small scalar parameter in the system equations. Using the solution of this reduced order problem, an asymptotic series approximation method is presented for obtaining the solution to the complete problem. A backward sweep approach on the reduced model is us... View full abstract»

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  • Error analysis in conjugate direction methods

    Publication Year: 1975, Page(s):43 - 50
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (459 KB)

    Error propagation in conjugate direction methods is analyzed. Step size errors at any given iteration are propagated without change. Errors in search direction behave differently. Consider a series of n iterations and assume an error occurs in one search direction, dk. Then, the nth search direction dn, will have k components which deviate from the correct direction dn*. View full abstract»

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  • On a certain form of necessary conditions for optimization in a banach space

    Publication Year: 1975, Page(s):51 - 54
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    First Page of the Article
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  • Scattering theory and linear least squares estimation: Part I: Continuous-time problems

    Publication Year: 1975, Page(s):55 - 56
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    The Riccati equation plays an equally important role in scattering theory as in linear least-squares estimation theory. However, in the scattering literature, a somewhat different framework of treating the Riccati equation has been developed. We show that this framework is very appropriate also for estimation problems, and that it enables us to give simple derivatitions of known results as well as... View full abstract»

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  • Scattering theory and linear least squares estimation: Part II: Discrete-time problems

    Publication Year: 1975, Page(s):57 - 58
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (119 KB)

    A certain "star-product" formalism in scattering theory as developed by Redheffer is shown to also be naturally applicable to discrete-time linear least-squares estimation problems. The formalism seems to provide a nice way of handling some of the well-known algebraic complications of the discrete-time case, e.g., the distinctions between time and measurement updates, predicted and filtered estima... View full abstract»

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  • Maximum likelihood estimation with reduced sensitivity functions

    Publication Year: 1975, Page(s):59 - 65
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (455 KB)

    A new approach is proposed for maximum likelihood estimation in linear constant coefficient dynamic systems with general structure. The formulation is developed in terms of the minimum number of variables required to specify the parameter sensitivity of state variables, called the reduced sensitivity functions. An efficient computation procedure is obtained for parameter estimation from time domai... View full abstract»

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  • Divergence and the fading memory filter

    Publication Year: 1975, Page(s):66 - 68
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    The fading memory filter has been proposed as a substitute for the Kalman filter when model errors exist because it discounts old data, thereby, compensating for the influence of model errors. For model errors in the form of completely unknown inputs, this paper presents computational examples for which the asymptotic error of all fading memory filters will be greater than the Kalman error. This c... View full abstract»

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  • Semicausal recursive filtering of images

    Publication Year: 1975, Page(s):69 - 70
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    A two dimensional discrete stochastic model for representing images is developed. This representation leads to a "hybrid" algorithm for spatial filtering of images. A "hybrid" algorithm is one where the filter equations are solved in a transform domain in one direction and in spatial domain in the other. Application of the model to linear filtering of images leads to scalar recursive filtering equ... View full abstract»

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  • Some geometric questions in the theory of linear systems

    Publication Year: 1975, Page(s):71 - 76
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (469 KB)

    In this paper we discuss certain geometrical aspects of linear systems which, even though they arise in the case of single-input/single-output systems, do not seen to have been explicitly recognized and studied before. We show, among other things, that the set of minimal, single-input/single-output, linear systems of degree n, when topologized in the obvious way, consists of n+1 connected componen... View full abstract»

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  • On an operator theory of linear systems with pure and distributed delays

    Publication Year: 1975, Page(s):77 - 80
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (261 KB)

    A representation theory based on convolution operations is developed for a large class of linear systems containing pure and distributed delays in state and control. In terms of this framework a necessary and sufficient condition and a sufficient condition are given for functional (null) controllability. The conditions involve the generation of modules defined over a convolution ring of functions. View full abstract»

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  • Distribution of control decisions in remote manipulation

    Publication Year: 1975, Page(s):81 - 91
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1972 KB)

    The particular characteristics of the problem of distributing control decisions between man and computer in remotely controlled manipulation are discussed. State of the art is reviewed from two viewpoints: (1) Specifications of both control commands and control context of sensor signals the operator inputs to the manipulator control computer. (2) Operations the manipulator control computer perform... View full abstract»

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  • A micro computer based arm prosthesis with two channel sensory feedback

    Publication Year: 1975, Page(s):92 - 98
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (458 KB)

    A model of the human arm, emphasizing the neuromuscular mechanism of feedback and control, has been constructed. Reconstruction efforts focused on two parallel aspects of the model: (1) direct control, (2) sensory feedback. The control scheme included a micro computer aided arm prosthesis using myoelectric pattern recognition as the control concept. The feedback elements centered around generation... View full abstract»

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  • Hierarchically intelligent control of a bionic arm

    Publication Year: 1975, Page(s):99 - 104
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    A shoulder-disarticulation prosthesis with seven degrees of freedom is formulated as a decision process accepting fuzzy commands from the human nervous system. The problem is decomposed into a functional hierarchy of three levels associated with organization, coordination, and Self-Organizing control, respectively. The highest level transforms a complex command into a sequence of elementary motion... View full abstract»

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  • Multifunctional control of artificial upper limbs based on parameter identification of myoelectric signals

    Publication Year: 1975, Page(s):105 - 110
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (478 KB)

    The paper describes a system for controlling an artificial upper extremity prosthesis for above elbow amputees in several degrees of freedom. The system employs microprocessor hardware and is based on time series identification of the voluntary myoelectric signals involved and on subsequent limb-function discrimination via the above parameters. The system requires only 1 to 2 electrode sites and s... View full abstract»

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