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J.V. Medanic

Bio: J.V. Medanic is an academic researcher from University of Illinois at Urbana–Champaign. The author has contributed to research in topics: Multivariable calculus & Control system. The author has an hindex of 11, co-authored 30 publications receiving 1194 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, a methodology for the design of reliable centralized and decentralized control systems is developed, and the resulting control systems are reliable in that they provide guaranteed stability and H/sub infinity / performance not only when all control components are operational, but also for sensor or actuator outages in the centralized case, or for control-channel outages for the decentralized case.
Abstract: A methodology for the design of reliable centralized and decentralized control systems is developed. The resulting control systems are reliable in that they provide guaranteed stability and H/sub infinity / performance not only when all control components are operational, but also for sensor or actuator outages in the centralized case, or for control-channel outages in the decentralized case. Reliability is guaranteed provided these outages occur only within a prespecified subset of control components. Strongly stabilizing designs are also developed, for both centralized and decentralized systems. >

697 citations

Journal ArticleDOI
TL;DR: In this article, an approach to modeling, analysis, and design of slow distributed voltage control schemes is proposed, in particular, a dynamical voltage model governed by the under load tap-changing transformers as control tools is studied.
Abstract: In this paper, an approach to modeling, analysis, and design of slow distributed voltage control schemes is proposed. In particular, a dynamical voltage model governed by the under load tap-changing transformers as control tools is studied. Rigorous conditions are derived to predict when the LTC based scheme may be poorly coordinated and not able to maintain voltages within the limits. The proposition is that nonconvergence of LTC control scheme is one of the causes of a systemwide voltage collapse.

85 citations

Journal ArticleDOI
TL;DR: Simplex type dynamic output feedback variable structure control for stabilizing multivariable linear time-invariant plants is analyzed in this article, where two types of controllers are considered; a compensator type and an observer type.
Abstract: Simplex type dynamic output feedback variable structure control for stabilizing multivariable linear time-invariant plants is analysed. Two types of controllers are considered; a compensator type and an observer type. It is shown that while the compensator-type controller stabilizes the plant only if the plant is minimum-phase, the observer-type controller does not face the same restriction. The design of low-order (less than the order of the plant) observer-type controllers is also considered.

82 citations

Journal ArticleDOI
TL;DR: In this article, the problem of constructing a reduced-order model induced by the information structure is considered and a new system representation, denoted as the Generalized Hessenberg Representation (GHR), is introduced and chained aggregation which transforms the system representation into GHR is described.
Abstract: The problem of constructing a reduced-order model induced by the information structure is considered A new system representation, denoted as the Generalized Hessenberg Representation (GHR), is introduced and chained aggregation which transforms the system representation into the GHR is described A ninth-order model of a two-thermal plant power system used in load-frequency studies is presented to demonstrate the potential of the GHR in model reduction The role of GHR in identifying model structure and suggesting appropriate subsets of adjustable parameters is established

70 citations

Journal ArticleDOI
TL;DR: In this article, a method for solving the output regulator problem is extended to linear systems with constant disturbances, and the design of static and low-order dynamic regulators for linear systems based on the use of projective controls is reviewed.
Abstract: A method recently developed for solving the output regulator problem is extended to linear systems with constant disturbances. The design of static and low-order dynamic regulators for linear systems based on the use of projective controls is reviewed first. The proposed method determines through a unified procedure the order and the parameters of the compensator, together with the feedback parameters. This methodology is then applied to systems with external disturbances, and various control structures incorporating integral action are investigated in the light of the proposed methodology.

46 citations


Cited by
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Journal ArticleDOI
TL;DR: A bibliographical review on reconfigurable fault-tolerant control systems (FTCS) is presented, with emphasis on the reconfiguring/restructurable controller design techniques.

2,455 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present new synthesis procedures for discrete-time linear systems based on a recently developed stability condition which contains as particular cases both the celebrated Lyapunov theorem for precisely known systems and the quadratic stability condition for systems with uncertain parameters.
Abstract: This paper presents new synthesis procedures for discrete-time linear systems. It is based on a recently developed stability condition which contains as particular cases both the celebrated Lyapunov theorem for precisely known systems and the quadratic stability condition for systems with uncertain parameters. These new synthesis conditions have some nice properties: (a) they can be expressed in terms of LMI (linear matrix inequalities) and (b) the optimization variables associated with the controller parameters are independent of the symmetric matrix that defines a quadratic Lyapunov function used to test stability. This second feature is important for several reasons. First, structural constraints, as those appearing in the decentralized and static output-feedback control design, can be addressed less conservatively. Second, parameter dependent Lyapunov function can be considered with a very positive impact on the design of robust H 2 and H X control problems. Third, the design of controller with mixed ...

675 citations

Journal ArticleDOI
Ron J. Patton1
TL;DR: The state of the art is outlined in a field which remains largely a theoretical topic with most application studies based upon aerospace systems and a basic literature review covering most areas of fault-tolerant control is provided.

562 citations

Journal ArticleDOI
TL;DR: A reliable robust tracking controller design method is developed based on the mixed linear quadratic (LQ)//H/sub /spl infin// tracking performance index and multiobjective optimization in terms of linear matrix inequalities.
Abstract: This paper studies the reliable robust tracking controller design problem against actuator faults and control surface impairment for aircraft. First, models of actuator faults and control surface impairment are presented. Then a reliable robust tracking controller design method is developed. This method is based on the mixed linear quadratic (LQ)//H/sub /spl infin// tracking performance index and multiobjective optimization in terms of linear matrix inequalities. Flight control examples are given, and both linear and nonlinear simulations are given.

557 citations

Journal ArticleDOI
TL;DR: A new controller design scheme based on a prescribed performance bound (PPB) which characterizes the convergence rate and maximum overshoot of the tracking error and can improve transient performance compared with the basic scheme is proposed.

537 citations