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IEEE Transactions on Automatic Control

Issue 11 • Nov 1998

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Displaying Results 1 - 23 of 23
  • Boundedness analysis of finitely recursive processes. II. Sequential and hybrid processes

    Publication Year: 1998, Page(s):1532 - 1542
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    Part I of this paper has shown that a subclass of the finitely recursive processes (FRP), composed without the sequential composition operator (SCO), is bounded. In this sequel it is first shown that boundedness is not guaranteed but decidable for the subclass of FRP built using the SCO, but without the parallel composition operator (PCO). To overcome the limitation in modeling using the SCO only,... View full abstract»

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  • Boundedness analysis of finitely recursive processes. I. Concurrent processes

    Publication Year: 1998, Page(s):1514 - 1531
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1388 KB)

    In the finitely recursive process (FRP) model of discrete event systems (DES), concepts about processes and process operators have been introduced. An infinite set of process expressions or functions can be built recursively through function composition using a few elementary operators. Given any process realization, it is important to find out whether the process is bounded, i.e., whether it has ... View full abstract»

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  • A comparison between Hankel norms and induced system norms

    Publication Year: 1998, Page(s):1658 - 1662
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    A general definition is formulated for the Hankel norms as the induced norms of a strictly proper stable linear time-invariant (LTI) system mapping vector-valued Lp-past inputs to vector-valued Lq-future outputs. Some Hankel norms are derived by the maximum principle and duality. A property termed the system integral invariance is introduced by the derivation of those Hankel ... View full abstract»

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  • On the discrete-time normal form

    Publication Year: 1998, Page(s):1654 - 1658
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    Necessary and sufficient conditions under which the discrete-time normal form exists are set both in geometric and in algebraic frameworks, leading to equivalent conditions. The results are therefore extended to generic nonlinear nonaffine continuous-time systems View full abstract»

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  • Adaptive tracking with saturating input and controller integral action

    Publication Year: 1998, Page(s):1638 - 1643
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    The authors consider the problem of controlling stable linear plants subject to input saturation constraints and parametric uncertainties. A globally stable adaptive controller which performs well in the presence of such constraints is designed, using a specific pole placement that accounts for the saturation constraint, an integral action to deal with the tracking problem, and an adaptive control... View full abstract»

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  • Delay-dependent robust stabilization of uncertain systems with multiple state delays

    Publication Year: 1998, Page(s):1608 - 1612
    Cited by:  Papers (214)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    This paper deals with the problem of robust stabilization for uncertain systems with multiple state delays. The parameter uncertainties are time-varying and unknown but are norm-bounded, and the delays are time-varying. A new method for achieving robust stabilization is presented for a class of uncertain time-delay systems via linear memoryless state feedback control. The results depend on the siz... View full abstract»

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  • Switching curve policy for manufacturing systems with no backlog permitted

    Publication Year: 1998, Page(s):1628 - 1630
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (108 KB)

    For failure-prone manufacturing systems with deterministic machine up time, the switching curve policy, which has a special property and can be characterized by a single parameter, was shown to be optimal. In previous work, the problem of optimal production rate control was studied under the assumption that backlog is allowed. In this paper, the authors consider manufacturing systems in which back... View full abstract»

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  • Further passivity results for the attitude control problem

    Publication Year: 1998, Page(s):1597 - 1600
    Cited by:  Papers (162)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB)

    In this paper we establish passivity for the system which describes the attitude motion of a rigid body in terms of minimal three-dimensional kinematic parameters. In particular, we show that linear asymptotically stabilizing controllers and control laws without angular velocity measurements follow naturally from these passivity properties. The results of this paper extend similar results for the ... View full abstract»

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  • Tracking in clutter with strongest neighbor measurements. I. Theoretical analysis

    Publication Year: 1998, Page(s):1560 - 1578
    Cited by:  Papers (54)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (964 KB)

    When tracking a target in clutter, a measurement may have originated from either the target, clutter, or some other source. The measurement with the strongest intensity (amplitude) in the neighborhood of the predicted target measurement is known as the “strongest neighbor” (SN) measurement. A simple and commonly used method for tracking in clutter is the so-called strongest neighbor fi... View full abstract»

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  • Parametric absolute stability of Lur'e systems

    Publication Year: 1998, Page(s):1649 - 1653
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    The concept of parametric stability is extended to include Lur'e-type nonlinear control systems with uncertain parameters and constant reference inputs. Conditions for parametric absolute stability are derived, which guarantee that the system remains stable despite uncertainty of equilibrium location caused by parametric uncertainties and values of the reference input. The conditions can be tested... View full abstract»

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  • On damped algebraic Riccati equations

    Publication Year: 1998, Page(s):1634 - 1637
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB)

    In a recent paper, an algorithm was proposed which produces dampening controllers based on damped algebraic Riccati equations (DAREs) derived from a periodic Hamiltonian system. The solution to one of these DAREs is symmetric and the other is skew-symmetric; both of these solutions lead to a dampening feedback, i.e., a stable closed-loop system for which the real parts of the eigenvalues are large... View full abstract»

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  • Stability impulse control of faulted nonlinear systems

    Publication Year: 1998, Page(s):1604 - 1608
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    This paper presents the impulse control approach intended to urgently return to the stability basin the system states affected by abrupt changes in certain system coefficients on a short time interval. Because of its short duration, the modeling of both the fault and controller involves δ-functions significantly simplifying analysis and control of fault phenomena. The design of an impulse co... View full abstract»

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  • μ/km-design with time-domain constraints

    Publication Year: 1998, Page(s):1622 - 1627
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    Standard μ/km-synthesis approaches cannot handle specifications on closed-loop time responses in a direct manner. On the other hand, constrained H∞ optimization handles explicitly time-domain specifications in an H∞-optimal control setting but is conservative with respect to structured model uncertainty. In this paper, the authors propose a constrain... View full abstract»

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  • Design of performance robustness for uncertain linear systems with state and control delays

    Publication Year: 1998, Page(s):1593 - 1596
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    The linear systems considered in this paper are subject to uncertain perturbations of norm-bounded time-varying parameters and multiple time delays in system state and control. The time delays are uncertain, independent of each other, and allowed to be time-varying. The integral quadratic cost criterion is employed to measure system performance. Using solutions of Lyapunov and Riccati equations, a... View full abstract»

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  • A method for the synthesis of controllers to handle safety, liveness, and real-time constraints

    Publication Year: 1998, Page(s):1543 - 1559
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    Describes a synthesis method that automatically derives controllers for timed discrete-event systems with nonterminating behavior modeled by timed transition graphs and specifications of control requirements expressed by metric temporal logic (MTL) formulas. Synthesis is performed by using: 1) a forward-chaining search that evaluates the satisfiability of MTL formulas over sequences of states gene... View full abstract»

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  • Shape signifiers for control of a low-order compressor model

    Publication Year: 1998, Page(s):1643 - 1648
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    Rotating stall and surge, two instability mechanisms limiting the performance of aeroengines compressors, are studied on the third-order Moore-Greitzer model. The skewness of the compressor characteristic, a single parameter shape signifier, is shown to determine the key qualitative properties of feedback control View full abstract»

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  • Incipient fault diagnosis of dynamical systems using online approximators

    Publication Year: 1998, Page(s):1612 - 1617
    Cited by:  Papers (148)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    Detection of incipient (slowly developing) faults is crucial in automated maintenance problems where early detection of worn equipment is required. In this paper, a general framework for model-based fault detection and diagnosis of a class of incipient faults is developed. The changes in the system dynamics due to the fault are modeled as nonlinear functions of the state and input variables, while... View full abstract»

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  • Online supervisor synthesis for partially observed discrete-event systems

    Publication Year: 1998, Page(s):1630 - 1634
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    A partial information supervisor that generates a class of closed controllable and observable sublanguages of a specified “legal” language is presented. This supervisor has the following features: 1) it can be implemented online (i.e., the disabled event set need only be computed once upon each event observation); 2) the computations of the disabled event set can be performed in O(mn) ... View full abstract»

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  • The block decoupling problem for systems over a ring

    Publication Year: 1998, Page(s):1600 - 1604
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    The decoupling problem by static-state feedback for a system with coefficients in a ring is investigated using a geometric approach. The notion of a precontrollability submodule, which captures the geometric aspects of the notion of controllability subset of the state space in the present context, is introduced and it is used for stating solvability conditions for the decoupling problem for a syst... View full abstract»

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  • Robust adaptive control of proper systems

    Publication Year: 1998, Page(s):1579 - 1584
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    To date, all the adaptive control algorithms have been proposed only for strictly proper systems. In this paper, a scheme is proposed to design an adaptive controller for proper systems. To study the robustness of the adaptive controller, both additive and multiplicative types of unmodeled dynamics are considered and can also be allowed to be proper, or even improper. Global bounded input bounded ... View full abstract»

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  • Adaptive nonlinear design without a priori knowledge of control directions

    Publication Year: 1998, Page(s):1617 - 1621
    Cited by:  Papers (189)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    Without a priori knowledge of the signs of the parameters called control directions (since they represent effectively the direction of motion under any control), a systematic procedure is developed for designing global adaptive control of a class of nonlinear systems. The class of systems possesses a triangular structure and can be of arbitrary dynamic order. No growth restrictions are imposed View full abstract»

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  • One-machine n-part-type optimal setup scheduling: analytical characterization of switching surfaces

    Publication Year: 1998, Page(s):1584 - 1588
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    The authors consider optimal setup scheduling of a single reliable machine. Production flow of n different part types and the setup process are described by differential equations. Setup change rates are control variables. Necessary conditions on optimal setup changes are characterized analytically, and optimal setup change times are derived for a given setup change sequence. The linearization of ... View full abstract»

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  • Reliable control using redundant controllers

    Publication Year: 1998, Page(s):1588 - 1593
    Cited by:  Papers (68)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    This paper presents a methodology for the design of reliable control systems by using multiple identical controllers to a given plant. The resulting closed-loop control system is reliable in the sense that it provides guaranteed internal stability and H∞ performance (in terms of disturbance attenuation), not only when all controllers are operational but also when some controller o... 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

Full Aims & Scope

Meet Our Editors

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