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IEEE Transactions on Automatic Control

Issue 6 • Date December 1976

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Displaying Results 1 - 24 of 24
  • [Front cover and table of contents]

    Publication Year: 1976, Page(s): 0
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  • Nonlinear feedback in simple locomotion systems

    Publication Year: 1976, Page(s):855 - 860
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    The purpose of this short paper is to analyze postural stability and periodic motion of a simple model of a locomotion system. Nonlinear feedback is used to linearize the system. The effects of discretization, quantization and noise are studied via simulation of a compound inverted pendulum with realistic actuator models. View full abstract»

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  • Comments on "Multistage least-squares parameter estimators"

    Publication Year: 1976, Page(s): 882
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (107 KB)

    First Page of the Article
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  • Author's reply

    Publication Year: 1976, Page(s): 885
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB)

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  • Comments on "A nonlinear economic control problem with a linear feedback solution"

    Publication Year: 1976, Page(s): 885
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB)

    In a recent paper by Luenberger[1] it was shown that a special nonlinear economic control problem had a unique global solution expressible in linear feedback form and that the optimal return function was affine. It is shown here that these results may be extended to a much wider class of economic problems. View full abstract»

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  • [Back cover]

    Publication Year: 1976, Page(s): 0
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    Freely Available from IEEE
  • Extended Lyapunov adaptation law for model reference systems

    Publication Year: 1976, Page(s):879 - 880
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    An extension of the adaptation methods presented previously by Ten Cate are presented. Proof of asymptotic stability of the error is effected using Lyapunov theory. This method completes the triplet of a group of previously published adaptation rules for a variation suggested by Shahein et al. using a plant-model parameter misalignment function. View full abstract»

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  • Approximations to Riccati equations having slow and fast modes

    Publication Year: 1976, Page(s):846 - 855
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    Problems associated with the optimal linear regulator when one control is penalized much less than the others, and the optimal linear estimator when one measurement is of a much higher quality than the others are considered. Both situations cause the Riccati equation's solution to have transients with radically different speeds. In order to generate solutions with radically different transient spe... View full abstract»

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  • Unidentifiability versus "actual" observability

    Publication Year: 1976, Page(s):876 - 877
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    It is shown that the observability of a linear state equation, only input-output accessible, does not imply that all the states can be actually evaluated. Such possibility, depends on the identifiability properties of the equations. A necessary, and sufficient condition for observability of the states, when the equations are unidentifiable, is derived. It is also shown that in such situations the ... View full abstract»

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  • A simple dual control problem with an analytical solution

    Publication Year: 1976, Page(s):840 - 844
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    A stochastic control problem for which the optimal dual control law can be calculated analytically is given. The system is a four state Markov chain with transition probabilities that depend on the control variable. The performance of the optimal dual control law and of some suboptimal control laws are calculated and compared. View full abstract»

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  • Model following using partial state feedback

    Publication Year: 1976, Page(s):844 - 846
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    This short paper considers the problem of designing a compensating control scheme for an observable linear multivariable plant using partial state feedback so that the impulse response matrix of the resulting system exactly corresponds to the impulse response matrix of a prespecified linear model. A procedure is given for the synthesis of the compensator that does not require a separate realizatio... View full abstract»

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  • Solving the optimal attention allocation problem in manual control

    Publication Year: 1976, Page(s):813 - 822
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    Within the context of the optimal control model of human response, analytic expressions for the gradients of closed-loop performance metrics with respect to human operator attention allocation are derived. These derivatives serve as the basis for a gradient algorithm that determines the optimal attention that a human should allocate among several display indicators in a steady-state manual control... View full abstract»

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  • Structural features of factorable Volterra systems

    Publication Year: 1976, Page(s):822 - 832
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    Several structural features are investigated for the class of systems \Pi _{K} composed of K linear dynamic subsystems connected in parallel with outputs multiplied (in the time domain). Concepts of reachability and observability of \Pi _{K} are introduced and characterized in terms ... View full abstract»

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  • A condition for decentralization in model reference adaptive systems

    Publication Year: 1976, Page(s):880 - 881
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    It is shown that when the interconnection pattern within a system conforms to certain prescribed symmetry requirements, decentralized adaptive algorithms for identification and control can be developed within a decomposition-decentralization framework. This is useful in the presence of constraints on the available information structure of the system. View full abstract»

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  • Additional comments on "Multistage least-squares parameter estimation"

    Publication Year: 1976, Page(s):883 - 885
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    The purpose of this correspondence is to call attention to other solutions to the problem addressed in the above paper,[1] that of adding or deleting parameters or measurements from a given linear model. The solution algorithms proposed in the article are numerically ill-conditioned and are less efficient, in terms of both computational and storage requirements, than the methods described here. Se... View full abstract»

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  • On state variables filters for adaptive system design

    Publication Year: 1976, Page(s):874 - 876
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    An alternative way of using the state variable filters, coupled with the Kalman-Yacubovich lemma or Popov's hyperstability theorem, in the design of model reference adaptive systems is proposed. The improvement over previous designs is the increased flexibility in the selection of the filter parameters to reduce the effects of noise or initial conditions. View full abstract»

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  • On input-output parametric invariance in linear systems

    Publication Year: 1976, Page(s):870 - 871
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    The problem of the invariance of the input-output behavior of time-invariant linear systems under perturbations in the system matrices and initial conditions is examined. Previous results are unified and expanded upon, and new results for invariance in the presence of perturbations in the output matrix are given. Conditions for input-output invariance are related to the subspace of reachable state... View full abstract»

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  • New estimation algorithms for nonlinear continuous systems with multiple delays

    Publication Year: 1976, Page(s):872 - 873
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    New estimation algorithms have been derived for nonlinear continuous-time systems with multiple delays corrupted by white noise and correlated noise. The derivation assumes linearity in innovations and exploits some recent results of nonlinear continuous-time systems to obtain the filtering and error-covariance equations. The results are recursire and physically realizable under the assumption tha... View full abstract»

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  • The algebra of λ matrices: An effective tool for sensitivity analysis

    Publication Year: 1976, Page(s):881 - 882
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    A new sensitivity method based upon the algebra of λ matrices is presented. The technique is utilized to inspect the effect of misidentifying statistical information of maximum-likelihood estimators. An upper sensitivity error bound is derived. View full abstract»

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  • On the comparison of optimal control systems

    Publication Year: 1976, Page(s):877 - 878
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    This correspondence presents conditions which permit the comparison of the optimal performance of control systems which have the same criterion but different dynamics. These conditions are applied to linear quadratic problems and to establishing performance bounds for suboptimal systems. View full abstract»

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  • Identifiability of linear and nonlinear dynamical systems

    Publication Year: 1976, Page(s):833 - 837
    Cited by:  Papers (62)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    This short paper considers the identification of dynamical systems from input-output data. The problem of parameter identifiability for such systems is approached by considering whether system outputs obtained with different parameter values can be distinguished one from another. The results are stated formally by defining the notion of "output distinguishability." Parameter identifiability is the... View full abstract»

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  • A decision theoretic approach to parameter estimation

    Publication Year: 1976, Page(s):860 - 866
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    A decision theoretic approach to estimation of unknown random and nonrandom parameters from a linear measurements model is proposed, when the a priori statistics are incomplete and only a small number of data points are available. The unknown statistics are partially characterized by considering two regions in the measurement space, namely, good and bad data regions and constraining the partial pr... View full abstract»

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  • Identifiability conditions for linear multivariable systems operating under feedback

    Publication Year: 1976, Page(s):837 - 840
    Cited by:  Papers (48)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    The possibility of estimating the parameters of a dynamic system when it is operating in closed loop is examined. Earlier considered ways of designing regulators to achieve desired identifiability properties are unified and generalized. The result of the analysis of this short paper gives a simple criterion, which contains earlier known conditions as simple special cases. View full abstract»

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  • Continuous-time optimal control theory for cost functionals including discrete state penalty terms

    Publication Year: 1976, Page(s):866 - 869
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    In this short paper, continuous-time optimal control problems are treated, where the cost functional includes additional discrete state penalty terms K_{j}(x(t_{j})) at specified times t_{j}(j = 1,..., N - 1) in the interior of the time interval [t_{0}, t_{N}] of the problem. Necess... View full abstract»

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Aims & Scope

In the IEEE Transactions on Automatic Control, the IEEE Control Systems Society publishes high-quality papers on the theory, design, and applications of control engineering.  Two types of contributions are regularly considered

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Meet Our Editors

Editor-in-Chief
P. J. Antsaklis
Dept. Electrical Engineering
University of Notre Dame