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Automatic Control, IEEE Transactions on

Issue 10 • Date October 1983

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Displaying Results 1 - 15 of 15
  • [Front cover and table of contents]

    Publication Year: 1983 , Page(s): 0
    Save to Project icon | Request Permissions | PDF file iconPDF (175 KB)  
    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1983 , Page(s): 0
    Save to Project icon | Request Permissions | PDF file iconPDF (135 KB)  
    Freely Available from IEEE
  • Adaptive tracking of multiple hot-spot target IR images

    Publication Year: 1983 , Page(s): 937 - 943
    Cited by:  Papers (24)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (848 KB)  

    In the recent past, the capability of tracking dynamic targets from forward-looking infrared (FLIR) measurements has been improved substantially, by replacing standard correlation trackers with adaptive extended Kalman filters. This research investigates a tracker able to handle "multiple hot-spot" targets, in which digital (or optical) signal processing is employed on the FLIR data to identify the underlying target shape. This identified shape is then used in the measurement model portion of the filter as it estimates target offset from the center of the field-of-view. In this algorithm, an extended Kalman filter processes the raw intensity measurements from the FLIR to produce target estimates. An alternative algorithm uses a linear Kalman filter to process the position indications of an enhanced correlator in order to generate tracking estimates; the enhancement is accomplished not only by thresholding to eliminate poor correlation information, but also by incorporating the dynamics information from the Kalman filter and the on-line identification of the target shape as a template instead of merely using previous frames of data. The performance capabilities of these two algorithms are evaluated under various tracking environment conditions and for a range of choices of design parameters. View full abstract»

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  • Decoupled control of robots via asymptotic regulators

    Publication Year: 1983 , Page(s): 978 - 981
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (448 KB)  

    A procedure for industrial robot control synthesis based on asymptotic regulator properties is presented. It involves computer linearization of the dynamic manipulator model along a given nominal trajectory and an efficient algorithm for synthesis of a robust linear regulator ensuring the decoupled control of the system. View full abstract»

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  • An LQ-solution to a control problem associated with a solar thermal central receiver

    Publication Year: 1983 , Page(s): 971 - 978
    Cited by:  Papers (69)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1032 KB)  

    The linearized process dynamics of the steam boiler in a solar-powered central receiver change abruptly when clouds interfere with the sun's rays. The steam temperature regulator used to maintain proper exit steam conditions must control a system with variable structure and discontinuous state trajectories. This paper investigates the quadratic-optimal control of such a system, and gives the design equations for the optimal regulator. View full abstract»

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  • On the instability of slotted ALOHA multiaccess algorithm

    Publication Year: 1983 , Page(s): 994 - 996
    Cited by:  Papers (16)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (336 KB)  

    The slotted ALOHA multiaccess algorithm for the infinite user model is shown to be unstable via a martingale method of independent interest. Consequently, the hypothesis of statistical equilibrium used to calculate the maximum throughput is not valid. View full abstract»

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  • A generalization of the Routh-Hurwitz stability criteria and an application to a problem in robust controller design

    Publication Year: 1983 , Page(s): 965 - 970
    Cited by:  Papers (17)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (560 KB)  

    The classical results of Routh and Hurwitz on the stability of polynomials are generalized from the open left half plane to certain other subregions G of the complex plane. By our method, arbitrary conic sections can be handled. The results are interpreted as criteria for G -stability of linear systems. A numerical algorithm to compute the criteria is given. An application to a problem in robust controller design is outlined. View full abstract»

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  • Contribution of suboptimal control of manipulation robots

    Publication Year: 1983 , Page(s): 981 - 985
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (552 KB)  

    Nonlinear model of an active spatial mechanism is considered as a set of subsystems each associated to one mechanical degree of freedom. For each decoupled subsystem, control, minimizing local criterion, is synthesized. Since the destabilizing influence of coupling among subsystems could be strong, global control is introduced in order to decrease suboptimality of the decentralized control applied. The control synthesis is demonstrated on an example of a six degree of freedom (DOF) manipulator. View full abstract»

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  • An optimal controller arising from minimization of a quadratic performance criterion of indefinite form

    Publication Year: 1983 , Page(s): 985 - 987
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (344 KB)  

    The problem of minimizing energy loss in automatic steering of ships is considered. Two ship types are analyzed-a high-speed containership and a large oil tanker. Making use of the sufficiency conditions for existence of a stable closed-loop system, it is shown that there is no theoretical difficulty in using an exact performance criterion for energy losses due to steering with an indefinite form, rather than an approximate criterion which fits the positive semidefiniteness condition of standard linear regulator (LR) theory. View full abstract»

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  • A normalized ladder form of the residual energy ratio algorithm for PARCOR estimation via projections

    Publication Year: 1983 , Page(s): 943 - 952
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (912 KB)  

    In this paper, we give a square-root normalized ladder algorithm for the residual energy ratio (RER) method of PARCOR coefficient estimation. The derivation uses a Hilbert space projection approach similar to that of Lee and Morf, but requires an additional related Hilbert space and its corresponding projection operators. The resulting partial correlation estimates guarantee a stable synthesis filter. In addition, we show how the algorithm may be cast in a form suitable for implementation by a CORDIC processor. Finally, we show how the normalized covariance form corresponds to an RER formulation where the prediction error energies used are chosen properly. View full abstract»

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  • Dynamic system identification: Experiment design and data analysis

    Publication Year: 1983 , Page(s): 999 - 1000
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (176 KB)  

    First Page of the Article
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  • Stabilizability of second-order bilinear systems

    Publication Year: 1983 , Page(s): 987 - 989
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (352 KB)  

    This note states necessary, and sufficient conditions for the existence of a linear state feedback controller such that a second-order bilinear system has a globally asymptotically stable closed loop. A suitable controller is constructed for each system which satisfies the conditions. View full abstract»

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  • Eigenstructure assignment in linear multivariable systems--A parametric solution

    Publication Year: 1983 , Page(s): 990 - 994
    Cited by:  Papers (26)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (440 KB)  

    This paper generalizes a recently reported method [1] of closed-loop eigenstructure assignment via state feedback in a linear multivariable system (with n states and r control inputs). By introducing a lemma on the differentiation of determinants, the class of assignable eigenvectors and generalized eigenvectors associated with the assigned eigenvalues is explicitly described by a complete set of n r -dimensional free parameter vectors. This parametric characterization conveniently organizes the nonuniqueness of the solution of the eigenvalue-assignment problem and thereby provides an efficient means of further modifying the system dynamic response. A numerical example is worked out to demonstrate the feasibility of the method. View full abstract»

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  • A new set of invariants for linear systems--Application to reduced order compensator design

    Publication Year: 1983 , Page(s): 953 - 964
    Cited by:  Papers (80)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1152 KB)  

    A new set of invariants for linear systems, weighting the contribution of each state component to the inherent closed-loop LQG behavior of the system is presented, together with applications to model order reduction and reduced order compensator design. View full abstract»

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  • Recursive algorithms for the Bayes solution of the fixed-point and fixed-lag smoothing problems

    Publication Year: 1983 , Page(s): 996 - 998
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (320 KB)  

    Recursive algorithms for the Bayes solutions of the fixed-point and fixed-lag smoothing problems are obtained. Recursive algorithms for the respective smoothed a posteriori densities are derived under assumptions that the signal to be estimated is a Markov process and the observation is a signal embedded in independent noise (not necessarily additive) which is also independent of the signal. The recursive algorithm for the fixed-point smoothing is applied to a binary Markov signal corrupted by an independent noise in a nonlinear manner. 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