IEEE Transactions on Automatic Control

Issue 2 • Feb. 1999

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Displaying Results 1 - 25 of 33
  • Electronic submissions now accepted

    Publication Year: 1999, Page(s): 238
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    Freely Available from IEEE
  • Robust controller design for matrix second-order systems with structured uncertainty

    Publication Year: 1999, Page(s):401 - 405
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (165 KB)

    Matrix second-order systems arise frequently in the formulation of dynamic systems in classical mechanics, robotics, aerodynamics and many others. Though formulation of the control design problem in matrix second-order form has many advantages, there is very little literature available on this topic-even for nominal case. In this paper, we design controller gains directly in matrix second-order fo... View full abstract»

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  • Necessary and sufficient conditions for the output feedback regularization of descriptor systems

    Publication Year: 1999, Page(s):405 - 412
    Cited by:  Papers (45)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (300 KB)

    The problem of output feedback regularization of descriptor systems is studied. Necessary and sufficient conditions are given to regulate the descriptor systems by derivative and proportional output feedback into a closed-loop regular system, which is of index at most one View full abstract»

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  • Further properties of optimal hedging points in a class of manufacturing systems

    Publication Year: 1999, Page(s):379 - 382
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (148 KB)

    For single-part-type manufacturing systems with homogeneous irreducible Markov machine failure rates, it is known that simple feedback control policies, called hedging point policies, are optimal, and the stationary probability distribution of the part surplus can be obtained analytically for given tentative values of hedging points. In this paper, the authors extend previous work on the ordering ... View full abstract»

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  • State observers for discrete-time linear systems with unknown inputs

    Publication Year: 1999, Page(s):397 - 401
    Cited by:  Papers (62)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (164 KB)

    In the paper the problem of designing a full-order state observer for a general discrete-time linear system with unknown inputs is analyzed. Necessary and sufficient conditions for the existence either of an asymptotic or of a deadbeat observer are provided, and a constructive design procedure, together with some examples, are discussed. Finally, the equivalence of these conditions for problem sol... View full abstract»

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  • Robustness of supervisors for discrete-event systems

    Publication Year: 1999, Page(s):376 - 379
    Cited by:  Papers (35)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (172 KB)

    Supervisory control in the context of ω-languages is considered. The nominal supervisor design problem is to find a non-blocking supervisor for a nominal plant such that the closed-loop infinite behavior equals a specified closed-loop behavior. The robustness of solutions to the nominal problem is defined with respect to variations in the plant. It is shown there exists a supervisor solving ... View full abstract»

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  • Robust H-output feedback control of decoupled automobile active suspension systems

    Publication Year: 1999, Page(s):392 - 396
    Cited by:  Papers (49)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (156 KB)

    H∞-output feedback control is applied to the control of automobile active suspensions based on a dynamic model of the full vehicle. The output feedback control is desirable from the viewpoint of implementation in the sense that it reduces the number of measurements drastically compared with state feedback used currently in suspension control. In this paper, the authors show that a... View full abstract»

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  • On the nonlinear and nonnormal filter using rejection sampling

    Publication Year: 1999, Page(s):314 - 319
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (264 KB)

    A nonlinear and/or nonnormal filter is proposed using rejection sampling. Generating random draws of the state-vector directly from the filtering density, the filtering estimate is simply obtained as the arithmetic average of the random draws. In the proposed filter, the random draws are recursively generated at each time. Monte Carlo experiments indicate that the proposed nonlinear and nonnormal ... View full abstract»

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  • A probabilistic language formalism for stochastic discrete-event systems

    Publication Year: 1999, Page(s):280 - 293
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (668 KB)

    The formalism of probabilistic languages has been introduced for modeling the qualitative behavior of stochastic discrete-event systems. A probabilistic language is a unit interval-valued map over the set of traces of the system satisfying certain consistency constraints. Regular language operators such as choice, concatenation, and Kleene-closure have been defined in the setting of probabilistic ... View full abstract»

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  • A unifying approach of LTI discrete-time state observers by means of complementary matrices

    Publication Year: 1999, Page(s):422 - 426
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (192 KB)

    This paper deals with the generalization of state observers in the framework of LTI deterministic discrete-time systems using complementary matrix formalism. Four necessary and sufficient general conditions have been established in the design of any type of state observer. Furthermore, necessary sufficient intrinsic conditions have been deduced. Respecting these intrinsic conditions guarantees sat... View full abstract»

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  • On the synthesis of stable ℋ controllers

    Publication Year: 1999, Page(s):431 - 435
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (204 KB)

    A sufficient condition is derived for the existence of a stable suboptimal ℋ∞ controller. It is shown that if a certain algebraic Riccati equation, determined from a parameterization of all suboptimal ℋ∞ controllers, has a positive definite stabilizing solution, then a stable ℋ∞ controller of order 2n can be constructed, where n is ... View full abstract»

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  • An iterative learning controller with initial state learning

    Publication Year: 1999, Page(s):371 - 376
    Cited by:  Papers (111)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (232 KB)

    In iterative learning control (ILC), a common assumption is that the initial states in each repetitive operation should be inside a given ball centred at the desired initial states which may be unknown. This assumption is critical to the stability analysis, and the size of the ball will directly affect the final output trajectory tracking errors. In this paper, this assumption is removed by using ... View full abstract»

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  • Partial model matching via static feedback (the multivariable case)

    Publication Year: 1999, Page(s):386 - 392
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (260 KB)

    The problem of partial model matching is studied for the case of multi-input/multi-output (MIMO) linear time-invariant systems. Using a regular static state feedback law, the necessary and sufficient conditions for the problem to have a solution are established, the general analytic expressions of the controller matrices are derived. For the case of single-input/single-output systems sufficient co... View full abstract»

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  • Periodic descriptor systems: solvability and conditionability

    Publication Year: 1999, Page(s):310 - 313
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (148 KB)

    The authors consider discrete-time linear periodic descriptor systems and study the concepts of solvability and conditionability, introduced by Luenberger. They prove that solvability is equivalent to conditionability, just as in the time-invariant case. We give a characterization of solvability/conditionability in terms of a cyclic matrix pencil and, furthermore, propose a simple test via the per... View full abstract»

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  • Decoupling of structured systems by parameter-independent precompensation and state feedback

    Publication Year: 1999, Page(s):348 - 352
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (176 KB)

    In this paper, structured systems described by state-space models are considered. For these systems, the entries of the state-space model matrices are assumed to be either fixed zeros or free independent parameters. We study the dynamic decoupling of structured linear systems. It turns out that a large class of systems which is not state feedback decouplable can be made decouplable by the addition... View full abstract»

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  • A characterization of parity space and its application to robust fault detection

    Publication Year: 1999, Page(s):337 - 343
    Cited by:  Papers (84)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (292 KB)

    Deals with problems related to the parity relation-based residual generation. A characterization of parity vectors and a relationship between the order of parity relations and the dimension of the parity space are derived. The achieved results are used to determine the degree of freedom for designing parity relation-based residual generators and to study the robustness problem View full abstract»

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  • A recursive technique for tracking control of nonholonomic systems in chained form

    Publication Year: 1999, Page(s):265 - 279
    Cited by:  Papers (295)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (672 KB)

    The authors address the tracking problem for a class of nonholonomic chained form control systems. A recursive technique is proposed which appears to be an extension of the currently popular integrator backstepping idea to the tracking of nonholonomic control systems. Conditions are given under which the problems of semiglobal tracking and global path-following are solved for a nonholonomic system... View full abstract»

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  • Output-feedback stochastic nonlinear stabilization

    Publication Year: 1999, Page(s):328 - 333
    Cited by:  Papers (234)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (300 KB)

    The authors present the first result on global output-feedback stabilization (in probability) for stochastic nonlinear continuous-time systems. The class of systems that they consider is a stochastic counterpart of the broadest class of deterministic systems for which globally stabilizing controllers are currently available. Their controllers are “inverse optimal” and possess an infini... View full abstract»

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  • The relationship between the Z-transform and the discrete-time Fourier transform

    Publication Year: 1999, Page(s):370 - 371
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (56 KB)

    In this paper, the relationship between the one-sided Z-transform and the one-sided discrete-time Fourier transform is considered. It serves as the counterpart to a previous one derived for continuous functions. The benefit is in its application to unit step and periodic functions View full abstract»

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  • Convex methods for robust H2 analysis of continuous-time systems

    Publication Year: 1999, Page(s):239 - 252
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (672 KB)

    Treats the robust H2 performance question of evaluating the rejection of continuous-time white noise, in the worst case over structured uncertainty in the system. A frequency domain convex condition for robust H2 analysis is presented, with analogous properties as in the discrete-time case. In particular, necessary and sufficient results are obtained introducing a continuous-... View full abstract»

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  • Wavelet-based system identification for nonlinear control

    Publication Year: 1999, Page(s):412 - 417
    Cited by:  Papers (81)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (252 KB)

    Compactly supported orthogonal wavelets have certain properties that are useful for system identification and learning control. Drawing on the rich theory of wavelets, we propose a system identification scheme based on orthogonal wavelets. Better accuracy of estimation can be obtained by adding more terms to the wavelet based identifier, and these terms do not alter the coefficients of the existin... View full abstract»

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  • Disturbance decoupled functional observers

    Publication Year: 1999, Page(s):382 - 386
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (164 KB)

    If a state observer does not exist, it is possible to design a functional observer. Principally, this is also true for systems with unknown inputs (termed as disturbances). Necessary and sufficient conditions for the existence of disturbance decoupled functional observers for linear time-invariant systems are provided. A method for designing such observers is given. The analysis and design are bas... View full abstract»

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  • Steady-state performance analysis of serial transfer lines subject to machine and buffer failure

    Publication Year: 1999, Page(s):319 - 325
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (216 KB)

    In modern automated production lines, it is common to connect adjacent machines with buffers. Since these buffers are mechanical devices, they are prone to failure. Previous research concerning the steady-state analytical modeling of serial transfer lines assumed that buffers are completely reliable. The paper considers the unreliable buffer and presents a model of the serial transfer line incorpo... View full abstract»

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  • Modeling and control of impact in mechanical systems: theory and experimental results

    Publication Year: 1999, Page(s):294 - 309
    Cited by:  Papers (83)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (916 KB)

    Considers the equations of motion of mechanical systems subject to inequality constraints, which can be obtained by looking for the stationary value of the action integral. Two different methods are used to take into account the inequality constraints in the computation of the stationary value of the action integral: the Valentine variables method and the penalty functions method. The equations of... View full abstract»

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  • LQ preview synthesis: optimal control and worst case analysis

    Publication Year: 1999, Page(s):352 - 357
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (264 KB)

    A generalized LQ-control problem, which treats a mixed attenuation of stored disturbance and initial state uncertainty, is discussed in the infinite-horizon time setting. The posed problem covers a part of predictive control problems and enables one to deal with the LQ optimal preview servocontroller design. For the generalized LQ problem, we first derive an optimal preview control which minimizes... 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