IEEE Transactions on Automatic Control

Issue 8 • August 1984

Filter Results

Displaying Results 1 - 25 of 29
  • [Front cover and table of contents]

    Publication Year: 1984, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (174 KB)
    Freely Available from IEEE
  • In memoriam: Harold Stephen Black (1898-1983)

    Publication Year: 1984, Page(s):673 - 674
    Cited by:  Papers (3)
    Request permission for commercial reuse | PDF file iconPDF (382 KB)
    Freely Available from IEEE
  • A golden ratio control policy for a multiple-access channel

    Publication Year: 1984, Page(s):712 - 718
    Cited by:  Papers (49)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (606 KB)

    Considernstations sharing a single communications channel. Each station has a buffer of length one. If the arrival rate of stationiis ri, then1-Pi_{i}(1- r_{i})is shown to be an upper bound (over all policies) on the throughput of the channel. Moreover, an optimal policy always exists and is stationary and periodic. The throughput of two policies, the ra... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reduction of redundant data in the quadratic cost formulation for linear time-variant systems

    Publication Year: 1984, Page(s):735 - 739
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (387 KB)

    Time-variant systems represented by pairs of matrices(A(t), B(t))and(bar{A}(t), bar{B}(t))are said to beF-equivalent if there exist differentiable matricesC, G, andDsuch thatbar{A}=C^{-1}[(A+BG)- dot{C}C^{-1}]C, bar{B} =C^{-1}BDandK-equivalent ifGequiv 0. The extent of independent parameters (functions) in the ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A fast covariance type algorithm for sequential least-squares filtering and prediction

    Publication Year: 1984, Page(s):752 - 755
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (375 KB)

    Fast implementation of sequential least-squares (LS) algorithms is of great importance in various applications of signal processing, estimation, system identification, and control. The purpose of this note is the introduction of an efficient sequential LS algorithm for multichannel unwindowed signals (covariance case). The new scheme, in the single channel case, requires 10mMADPR (multi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Comments on "On eigenstructure assignment in linear multivariable systems"

    Publication Year: 1984, Page(s):764 - 765
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (223 KB)

    The commenter points out that whereas Fahmy and O'Reilly (see ibid., vol. AC-27, no. 3, pp. 690-693, 1982) presented a parametric solution of the eigenstructure assignment problem for linear time-invariant systems, he himself had earlier given a similar solution by using another approach (see Regelungstechnik, vol. 29, pp. 228-233, 1981). He also notes that his approach was based on the dynamical ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Comments on "On sequential estimation of state noise variance"

    Publication Year: 1984, Page(s):764 - 765
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (223 KB)

    It is shown that the algorithm given by J. F. Leathrum in the paper for estimating state noise variance can be considerably simplified. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Authors' reply

    Publication Year: 1984, Page(s): 765
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (122 KB)

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • [Back cover]

    Publication Year: 1984, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (357 KB)
    Freely Available from IEEE
  • A stability inequality for nonlinear feedback systems with slope-restricted nonlinearity

    Publication Year: 1984, Page(s):743 - 744
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    Using Lyapunov's direct method, a stability inequality in frequency domain is derived for nonlinear feedback systems with slope-restricted nonlinearity. In the present approach, a transformed system that involves the slope of the nonlinearity is considered, thus leading to a stability inequality that incorporates the slope information (but not the sector information) of the nonlinearity. The appro... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A note on linear input/output maps of bounded-type

    Publication Year: 1984, Page(s):733 - 734
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    This note studies a class of constant, linear, continuous-time input/output maps, which is called input/output maps of bounded-type. An algebraic condition for an input/output map to be of bounded-type is given. Its application to realization theory (especially for delay-differential systems) is considered. An example is given to illustrate how it gives rise to a concrete realization procedure. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Minimum distance collision-free path planning for industrial robots with a prismatic joint

    Publication Year: 1984, Page(s):675 - 680
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    A collision-free path is a path which an industrial robot can physically take while traveling from one location to another in an environment containing obstacles. Usually the obstacles are expanded to compensate for the body width of the robot. For robots with a prismatic joint, which allows only a translational motion along its axis, additional problems created by the long boom are handled by mea... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On deadbeat controllers

    Publication Year: 1984, Page(s):719 - 722
    Cited by:  Papers (45)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    The possibility of achieving a deadbeat regulation and tracking in linear multivariable systems independently of their initial conditions is investigated. Necessary and sufficient conditions for the existence of various deadbeat controllers are established in a constructive way. A detailed analysis of the control sequence generated by any deadbeat controller is then presented. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adaptive control of mechanical impedance by coactivation of antagonist muscles

    Publication Year: 1984, Page(s):681 - 690
    Cited by:  Papers (411)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1176 KB)

    This paper examines the postulate that an important function of the activity of antagonist muscle groups is to modulate mechanical impedance. Some biomechanical modeling and analyses are presented leading to a prediction of simultaneous activation of antagonist muscles in the maintenance of upright posture of the forearm and hand. An experimental observation of antagonist coactivation in this situ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the development of equiobservable forms for linear multivariable systems

    Publication Year: 1984, Page(s):730 - 733
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    Three types of equiobservable forms are developed here for linear time-invariant multivariable systems. These forms are developed using a nonminimal realization of a system and have properties that are useful in the analysis and design of state observation and parameter identification problems. By employing the third form, the state equation can be expressed by using filtered values generated from... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimal control of a queueing system with two heterogeneous servers

    Publication Year: 1984, Page(s):696 - 703
    Cited by:  Papers (148)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    The problem considered is that of optimally controlling a queueing system which consists of a common buffer or queue served by two servers. The arrivals to the buffer are Poisson and the servers are both exponential, but with different mean service times. It is shown that the optimal policy which minimizes the mean sojourn time of customers in the system is of threshold type. The faster server sho... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Prior knowledge in model reference adaptive control of multiinput multioutput systems

    Publication Year: 1984, Page(s):761 - 764
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    This note shows how the prior knowledge necessary for model reference adaptive control of multiinput multioutput systems can be weakened. In particular, it is shown that the real variables appearing in the system interactor matrix can be estimated along with the other parameters appearing in the system model. This represents a significant reduction in the amount of prior knowledge required relativ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An exact characterization of linear systems with zeros everywhere in the complex plane

    Publication Year: 1984, Page(s):728 - 730
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    In this note, an exact characterization of autonomous linear multivariable systems with zeros everywhere in the complex plane is given in terms of the system matrices. Such systems are called degenerate. An important consequence of this characterization is that nondegeneracy is equivalent to the concept of functional reproducibility, introduced by Brockett and Mesarović. Based on this equival... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Feedback control of overloaded networks

    Publication Year: 1984, Page(s):704 - 711
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (864 KB)

    The network control problem in this paper is motivated by a class of emergency control problems in power systems for which the objective is to alleviate overloads in the transmission network. The state variables of the network are the flows and remaining overload capacities in the branches and the controls are the rates of change in the node injections. The control objective is to clear all overlo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A note on trajectory sensitivity reduction using a three-term controller

    Publication Year: 1984, Page(s):739 - 740
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    This technical note investigates the effectiveness of using a three-term controller for a linear quadratic regulator (LQR) problem in reducing trajectory sensitivity to plant parameters variation as compared to other developed techniques to solve the same problem. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multivariable frequency domain controller for magnetic suspension and balance systems

    Publication Year: 1984, Page(s):725 - 728
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    The magnetic suspension and balance system for an airplane model in a large wind tunnel is considered. In this system, superconducting coils generate magnetic forces and torques on the magnetized soft iron core of the airplane model. The control system is a position servo where the airplane model, with six degrees of freedom, follows the reference static or dynamic input commands. The controller d... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A control problem with pointwise state constraints

    Publication Year: 1984, Page(s):722 - 724
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    We consider a parabolic control problem in which the state is constrained pointwise. We obtain useful approximations by considering a regularized family of problems and show that the associated family of optimal controls converges strongly to the optimal control of the original problem. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Lyapunov steepest descent control of constrained linear systems

    Publication Year: 1984, Page(s):740 - 743
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    A Lyapunov sufficiency condition is developed for steepest descent controls to yield global asymptotic stability of the origin in constrained linear systems. The results are applied to a previous counterexample for "optimal-aim" control. Using the more flexible Lyapunov steepest descent approach, global asymptotic stability is achieved, where optimal-aim control produced instability. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Guaranteed robustness properties of multivariable nonlinear stochastic optimal regulators

    Publication Year: 1984, Page(s):690 - 696
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    We study the robustness of optimal regulators for nonlinear, deterministic and stochastic multiinput dynamical systems, under the assumption that all state variables can be measured. We show that, under mild assumptions, such nonlinear regulators have a guaranteed infinite gain margin; moreover, they have a guaranteed 50 percent gain reduction margin and a 60 degree phase margin in each feedback c... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reduction of 2-D rational functions

    Publication Year: 1984, Page(s):749 - 752
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    This paper presents a method of reducing a two-dimensional (2-D) rational function to an irreducible one. It is achieved by searching the first linearly dependent row, in order from top to bottom, of a generalized resultant. Some properties of the resultant are discussed. The result can be used to compute the greatest common divisor (g.c.d.) of two 2-D polynomials by carrying out one additional di... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

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

Full Aims & Scope

Meet Our Editors

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