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  • Journal article
    Angeli D, Casavola A, Mosca E, 2001,

    On feasible set-membership state estimators in constrained command governor control

    , Automatica, Vol: 37, Pages: 151-156, ISSN: 0005-1098

    An analysis is presented on the feasibility issue in command governor (CG) control with deterministic set-membership state estimators for determining the state uncertainty set (SUS), viz. the set of all states which are compatible with measurements and a priori knowledge on the system. It is shown that the recipe of modifying standard receding horizon CG schemes based on the full knowledge of the state is effective provided that the latter is exactly computed at any time. On the contrary, when simple-shaped outer approximations of SUS are exploited for reducing the numerical complexity of the algorithm, loss of solvability or stability may result.
  • Journal article
    Shrivastava Y, Lee CK, Hui SYR, Chung HSHet al., 2001,

    Comparison of RPWM and PWM space vector switching schemes for 3-level power inverters

    , PESC Record - IEEE Annual Power Electronics Specialists Conference, Vol: 1, Pages: 138-145, ISSN: 0275-9306

    In this paper, a comparative study of random and standard space vector PWM switching schemes for 3-level inverters is reported. An analysis on the Random and Standard schemes has been carried out. The advantages and disadvantages of both schemes are identified. Verified with measurements, these performance features will be described. The results provide valuable information for practicing engineers to evaluate the potential of these schemes.
  • Journal article
    Chung HSH, Tse KK, Hui SYR, Mok CMet al., 2001,

    A novel maximum power point tracker for PV systems

    , Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, Vol: 1, Pages: 321-327

    A novel technique for efficiently extracting the maximum output power from a solar panel under varying meteorological conditions is presented. The methodology is based on connecting a pulsewidth-modulated (PWM) DC/DC SEPIC or Cuk converter between a solar panel and a load or battery bus. The converter operates in discontinuous capacitor voltage mode whilst its input current is continuous. By modulating a small-signal sinusoidal perturbation into the duty cycle of the main switch and comparing the maximum variation in the input voltage and the voltage stress of the main switch, the maximum power point of the panel can be located. This approach ensures maximum power transfer under all conditions without using microprocessors for calculation. The tracking capability of the proposed technique has been verified experimentally with a 10W solar panel at different insolation levels and under simulated large-signal insolation level changes.
  • Journal article
    Qiu DY, Yip SC, Chung HSH, Hui SYRet al., 2001,

    On the use of current sensors for control of power converters

    , PESC Record - IEEE Annual Power Electronics Specialists Conference, Vol: 1, Pages: 302-307, ISSN: 0275-9306

    This paper investigates the use of current sensors for control of power converters. The whole system only requires current sensing devices that generate signals in response to the current flowing in inductors. Besides, such as used in current programming and in maximum current protection, the sensed current and the rate of change of the inductor current in different circuit topologies are used to determine the input and output voltages. Apart from reducing the number of sensors, the proposed method provides inherent electrical isolation between the power conversion stage and the controller, and thus reducing noise coupling.
  • Journal article
    Yip SC, Chung HSH, Hui SYR, 2001,

    A unified control scheme for a bi-directional ac-dc converter with high power quality

    , Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, Vol: 1, Pages: 74-80

    This paper presents the modeling, analysis, and design of a thyristor-based ac-dc converter, featuring bi-directional power flow and unity power factor at the ac side in both powering and regenerating modes. The unified controller regulates the voltage at the dc side and operates as a feedback control in the powering mode and a feedforward control in the regenerating mode. Systematic procedures for designing the power conversion stage and the controller are given.
  • Conference paper
    Chisci L, Falugi P, Zappa G, 2001,

    Predictive control for constrained LPV systems

    , Pages: 3074-3079

    This paper addresses predictive control of constrained LPV systems. The objective is to optimize nominal performance while guaranteeing robust stability and constraint satisfaction. The latter goal is achieved by exploiting invariant sets and a receding horizon optimization procedure which provides a nonlinear correction to the nominal gain scheduled linear feedback. Feasibility domains for the gain scheduled and predictive controller are evaluated.
  • Journal article
    Di Febbraro A, Parisini T, Sacone S, Zoppoli Ret al., 2001,

    Neural approximations for feedback optimal control of freeway systems

    , IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, Vol: 50, Pages: 302-313, ISSN: 0018-9545
  • Conference paper
    Lovera M, Parisini T, Verhaegen M, 2001,

    Fault detection: a subspace identification approach

    , 40th IEEE Conference on Decision and Control, Publisher: IEEE, Pages: 2275-2276, ISSN: 0743-1546
  • Conference paper
    Zhang XD, Polycarpou M, Parisini T, 2001,

    Fault isolation in a class of nonlinear uncertain input-output systems

    , American Control Conference (ACC), Publisher: IEEE, Pages: 1741-1746, ISSN: 0743-1619
  • Conference paper
    Parisini T, Sacone S, 2001,

    Stability analysis of an hybrid control scheme based on discrete-event automata and receding-horizon neural regulators

    , 1st IFAC/IEEE Symposium on Systems Structure and Control, Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: 267-272, ISSN: 0962-9505
  • Conference paper
    Contin A, D'Orlando S, Fenu G, Menis R, Milo S, Parisini Tet al., 2001,

    Fault detection on a real three-phase induction motor: Simulation and experimental results on residual generation

    , 40th IEEE Conference on Decision and Control, Publisher: IEEE, Pages: 167-172, ISSN: 0191-2216
  • Conference paper
    Zoppoli R, Sanguineti M, Parisini T, 2001,

    Can we cope with the curse of dimensionality in optimal control by using neural approximators?

    , 40th IEEE Conference on Decision and Control, Publisher: IEEE, Pages: 3540-3545, ISSN: 0191-2216
  • Conference paper
    Sandells DW, Green TC, Osborne M, Power Aet al., 2001,

    Power system applications for the chain-cell converter

    , 7th International Conference on AC-DC Power Transmission, Publisher: INST ELECTRICAL ENGINEERS INSPEC INC, Pages: 292-297, ISSN: 0537-9989
  • Conference paper
    Astolfi A, Bolzern P, Locatelli A, 2001,

    Path-tracking of a tractor-trailer vehicle via Lyapunov techniques

    , 2001 European control conference, Porto, Portugal, Pages: 451-456
  • Conference paper
    Ortega R, Astolfi A, 2001,

    Nonlinear pi control of uncertain systems: an alternative to parameter adaptation

    , 40th IEEE conference on decision and control, Orlando, Florida, 4 - 7 December 2001, Publisher: IEEE Control Systems Society, Pages: 1749-1754
  • Conference paper
    Astolfi A, Ortega R, 2001,

    Immersion and invariance: a new tool for stabilization and adaptive control of nonlinear systems

    , 5th symposium on nonlinear control systems; nonlinear control systems 2001, St. Petersburg, Russia, Publisher: Oxford; Pergamon, Pages: 91-96
  • Journal article
    De Pinho MDR, Vinter RB, Zheng H, 2001,

    A maximum principle for optimal control problems with mixed constraints

    , IMA Journal of Mathematical Control and Information, Vol: 18, Pages: 189-205, ISSN: 0265-0754
  • Conference paper
    Astolfi A, Colaneri P, 2001,

    An algebraic characterization for the static output feedback stabilization problem

    , American control conference, Arlington, VA, Publisher: IEEE, Pages: 1408-1413
  • Conference paper
    Gungah SK, Malik U, Jaimoukha IM, Halikias GDet al., 2001,

    A new upper bound for the real structured singular value

    , 40th IEEE conference on decision and control, Orlando, Florida, 4 - 7 December 2001, Publisher: IEEE Control Systems Society, Pages: 247-248
  • Conference paper
    Rapaport A, Astolfi A, 2001,

    A remark on the stability of interconnected nonlinear systems

    , 40th IEEE conference on decision and control, Orlando, Florida, 4 - 7 December 2001, Publisher: IEEE Control Systems Society, Pages: 3004-3008
  • Conference paper
    Marks JH, Green TC, 2001,

    Predictive control of active power filters

    , New York, 32nd annual power electronics specialist conference (PESC 2001), Vancouver, Canada, 17 - 21 June 2001, Publisher: IEEE, Pages: 1396-1401
  • Conference paper
    Marks JH, Green TC, 2001,

    Ratings analysis of active power filters

    , New York, 32nd annual power electronics specialist conference (PESC 2001), Vancouver, Canada, 17 - 21 June 2001, Publisher: IEEE, Pages: 1420-1425
  • Conference paper
    Sandells DW, Green TC, 2001,

    Firing angle optimisation for chain cell converters

    , New York, 32nd annual power electronics specialist conference (PESC 2001), Vancouver, Canada, 17 - 21 June 2001, Publisher: I e e e, Pages: 1549-1554
  • Conference paper
    Sandells D, Green TC, Power A, Osborne Met al., 2001,

    Chain cell converters in energy storage applications

    , London, IEE AC/DC transmission conference, London, November, Publisher: IEE, Pages: 292-297, ISSN: 0537-9989
  • Conference paper
    Astolfi A, Menini L, 2001,

    Noninteracting control with stability for nonlinear m-inputs m-outputs Hamiltonian systems

    , New York, 40th IEEE conference on decision and control, Orlando, Florida, 4 - 7 December 2001, Publisher: IEEE, Pages: 3384-3385
  • Conference paper
    Astolfi A, Menini L, 2001,

    A characterization of the noninteracting control problem with stability for a class of nonlinear hamiltonian systems

    , Oxford, 5th symposium on nonlinear control systems; nonlinear control systems 2001, St. Petersburg, Russia, Publisher: Pergamon, Pages: 1499-1504
  • Conference paper
    Pudjianto D, Ahmed S, Yao LZ, Strbac Get al., 2001,

    TP-2.3 Optimal reactive power allocation using sensitivity analysis based security constrained OPF (SA-SCOPF)

    , 5th International power engineering conference, Grand Copthorne Waterfront, Singapore, Pages: 111-116
  • Journal article
    Limebeer DJN, Sharp RS, Evangelou S, 2001,

    The stability of motorcycles under acceleration and braking

    , PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE, Vol: 215, Pages: 1095-1109, ISSN: 0954-4062
  • Conference paper
    Astolfi A, Hsu L, Netto M, Ortega Ret al., 2001,

    A solution to the adaptive visual servoing problem

    , New York, IEEE international conference on robotics and automation, Seoul, South Korea, 21 - 26 May 2001, Publisher: IEEE, Pages: 743-748
  • Conference paper
    Ortega R, Hsu L, Astolfi A, 2001,

    Adaptive control of multivariable systems with reduced prior knowledge (i)

    , 40th IEEE conference on decision and control, Orlando, Florida, 4 - 7 December 2001, Publisher: IEEE Control Systems Society, Pages: 4198-4203

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