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  • Journal article
    Karagiannis D, Astolfi A, Ortega R, 2003,

    Two results for adaptive output feedback stabilization of nonlinear systems

    , AUTOMATICA, Vol: 39, Pages: 857-866, ISSN: 0005-1098
  • Conference paper
    Chisci L, Falugi P, Zappa G, 2003,

    Tracking of piecewise constant references for constrained nonlinear systems

    , Pages: 886-891

    The paper addresses tracking of a piecewise constant reference for a nonlinear system subject to control and/or state constraints. The proposed controller, called dual-mode, extends to the nonlinear case an approach formerly introduced for linear systems. The dual-mode controller is based on the knowledge of the set of feasible state-setpoint pairs and operates in two different modes: as a regulator if the current state is feasible for the desired set-point, or attempts to recover feasibility as quickly as possible whenever feasibility is lost due to a set-point change. The difficulty of constructing the feasibility set in the state-setpoint space for a nonlinear system is overcome by embedding the original system into a family of uncertain (polytopic) linear systems.
  • Journal article
    Mayne DQ, Rakovic S, 2003,

    Optimal control of constrained piecewise affine discrete-time systems

    , COMPUTATIONAL OPTIMIZATION AND APPLICATIONS, Vol: 25, Pages: 167-191, ISSN: 0926-6003
  • Journal article
    Astolfi A, Ortega R, 2003,

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

    , IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 48, Pages: 590-606, ISSN: 0018-9286
  • Journal article
    Chisci L, Falugi P, Zappa G, 2003,

    Gain-scheduling MPC of nonlinear systems

    , INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL, Vol: 13, Pages: 295-308, ISSN: 1049-8923
  • Journal article
    Mayne DQ, Rakovic S, 2003,

    Model predictive control of constrained piecewise acne discrete-time systems

    , INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL, Vol: 13, Pages: 261-279, ISSN: 1049-8923
  • Conference paper
    Halikias GD, Jaimoukha IM, 2003,

    Design of infinite impulse response (IIR) filters with almost linear phase characteristics
  • Journal article
    Rao CV, Rawlings JB, Mayne DQ, 2003,

    Constrained state estimation for nonlinear discrete-time systems: Stability and moving horizon approximations

    , IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 48, Pages: 246-258, ISSN: 0018-9286
  • Journal article
    Tse KK, Ng RWM, Chung HSH, Hui SYRet al., 2003,

    An evaluation of the spectral characteristics of switching converters with chaotic carrier-frequency modulation

    , IEEE Transactions on Industrial Electronics, Vol: 50, Pages: 171-182, ISSN: 0278-0046

    This paper presents an evaluation of the spectral characteristics of switching converters with a chaotic carrier-frequency modulation scheme (CCFMS). By incorporating a Chua's circuit (CC) into the pulsewidth modulator for driving the switches, three modulation schemes, including the standard pulsewidth modulation scheme, periodic carrier-frequency modulation scheme, and CCFMS, can be realized with the CC in equilibrium, limit cycle, and chaos, respectively. The property of frequency spreading in CCFMS is studied by using statistical analysis method. The developed model is applied to formulate the power spectral densities of the input current and the output voltage of the three basic dc/dc converters under CCFMS. Theoretical predictions are verified with experimental measurements.
  • Journal article
    Prodanovic M, Green TC, 2003,

    Control and filter design of three-phase inverters for high power quality grid connection

    , IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 18, Pages: 373-380, ISSN: 0885-8993
  • Conference paper
    Alessandri A, Baglietto M, Battistelli G, Parisini Tet al., 2003,

    Receding-horizon estimation for noisy nonlinear discrete-time systems

    , 42nd IEEE Conference on Decision and Control, Publisher: IEEE, Pages: 5825-5830
  • Journal article
    Lee STS, Chung HSH, Chen G, Hui SYet al., 2003,

    Use of Chaotic Switching in Electronic Ballasts

    , IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol: E86-A, Pages: 2203-2208, ISSN: 0916-8508

    This paper investigates the use of chaotic pulsewidth modulation (CPWM) scheme for electronic ballasts to eliminate visible striations (appearance of black and white bands along the lamp tube) in fluorescent lamps. As striations can be eliminated by superimposing a small amount of dc current or low frequency ac current to the electrodes to produce composite current waveform through the lamp, the underlying principle of this work is based on the fact that the power spectral density of the lamp current will be rich of low-frequency harmonics at the output of inverters switching with CPWM. Most importantly, the lamp life will not be affected with chaotic switchings, because the lamp current crest factor is found to be similar to the one with standard pulsewidth modulation (PWM) and the lamp current does not have dc component. The effectiveness of eliminating striations is confirmed experimentally with a T8 36W prototype.
  • Journal article
    Hui RSY, 2003,

    Recent developments of planar printed circuit board (pcb) transformer technology

    , HKIE Transactions Hong Kong Institution of Engineers, Vol: 10, Pages: 35-41, ISSN: 1023-697X

    Rapid developments of planar magnetics in recent years have prompted new applications of planar transformers in electronic industry. The low-profi’e features of planar magentics make them attractive in many electronic systems that have stringent thickness requirements. In this article, some recent progress of planar PCB transformers and their applications are described. Comparisons of canventional and pianar transformers are reviewed. New trend of integrated electronic packaging in power electronic systems is briefly discussed. © 2003 Taylor & Francis Group, LLC.
  • Conference paper
    Camus R, Fenu G, Longo G, Pampanin F, Parisini Tet al., 2003,

    Identification of freeway-traffic dynamic models: a real case study

    , Annual American Control Conference (ACC 2003), Publisher: IEEE, Pages: 4579-4584, ISSN: 0743-1619
  • Conference paper
    Mayne DQ, 2003,

    Constrained control: Polytopic techniques

    , Symposium on Modeling, Control and Optimization of Complex Systems, Publisher: KLUWER ACADEMIC PUBLISHERS, Pages: 111-130, ISSN: 1388-4328
  • Conference paper
    Previdi F, Sacone S, Parisini T, 2003,

    A receding-horizon multiple model based control scheme for nonlinear systems

    , 42nd IEEE Conference on Decision and Control, Publisher: IEEE, Pages: 1431-1432
  • Conference paper
    Chisci L, Falugi P, Zappa G, 2003,

    Set-point tracking for a class of constrained nonlinear systems with application to a CSTR

    , 42nd IEEE Conference on Decision and Control, Publisher: IEEE, Pages: 3930-3935
  • Conference paper
    Chisci L, Falugi P, Zappa G, 2003,

    Tracking of piecewise constant references for constrained nonlinear systems

    , Pages: 886-891

    © 2003 EUCA. The paper addresses tracking of a piecewise constant reference for a nonlinear system subject to control and/or state constraints. The proposed controller, called dual-mode, extends to the nonlinear case an approach formerly introduced for linear systems. The dual-mode controller is based on the knowledge of the set of feasible state-setpoint pairs and operates in two different modes: as a regulator if the current state is feasible for the desired set-point, or attempts to recover feasibility as quickly as possible whenever feasibility is lost due to a set-point change. The difficulty of constructing the feasibility set in the state-setpoint space for a nonlinear system is overcome by embedding the original system into a family of uncertain (polytopic) linear systems.
  • Conference paper
    Rodrigues AO, Viana JJ, Rodrigues LOC, Vasconcelos JA, Ramirez JA, Green T, Freeman EMet al., 2003,

    3D visualization of temperature distributions induced by a cellular telephone in a model of the human head

    , 10th International Microwave and Optoelectronics Conference (IMOC), Publisher: IEEE, Pages: 339-344
  • Journal article
    Vellekoop MH, Clark JMC, 2003,

    A Nonlinear Filtering Approach To Changepoint Detection Problems: Direct And Differential-Geometric Methods

    , SIAM Journal on Control and Optimization, Vol: 42, Pages: 469-494
  • Conference paper
    Astolfi A, Isidori A, Marconi L, 2003,

    A note on disturbance suppression for Hamiltonian systems by state feedback

    , Kidlington, 2nd IFAC workshop on lagrangian and hamiltonian methods for nonlinear control, Seville, Spain, 3 - 5 April 2003, Publisher: Pergamon-Elsevier Science Ltd, Pages: 211-216
  • Conference paper
    Lazar M, Astolfi A, 2003,

    Global predictive regulation of a class of cascaded nonlinear systems with bounded control

    , IFAC symposium on robust control design
  • Conference paper
    Clark JMC, Vinter RB, 2003,

    A differential dynamic games approach to flow control

    , New York, 42nd IEEE conference on decision and control, Maui, HI, 9 - 12 December 2003, Publisher: IEEE, Pages: 1228-1231
  • Conference paper
    Liang J, Green TC, Weiss G, Zhong QCet al., 2003,

    Hybrid control of multiple inverters in an island-mode distribution system

    , New York, IEEE 34th annual power electronics specialists conference, Acapulco, Mexico, 15 - 19 Jun 2003, Publisher: IEEE, Pages: 61-66
  • Conference paper
    Kaliora G, Astolfi A, 2003,

    On the equivalence to feedforward forms

    , European control conference 2003
  • Conference paper
    Melovic D, Granard S, Strbac G, 2003,

    Effect of losses on design and regulation of distribution networks (Article no.5.38)

    , 17th International conference on electricity distribution; CIRED, Barcelona, Spain, Publisher: Liege; CIRED Secretariat
  • Conference paper
    Liang J, Green TC, Weiss G, Zhong QCet al., 2003,

    Decoupling control of the active and reactive power for a three-phase inverter

    , Proceedings of the European control conference, Cambridge, UK, September 2003
  • Journal article
    Hernandez-Aramburo CA, Green TC, Smith S, 2003,

    Assessment of power losses of an inverter-driven induction machine with its experimental validation

    , IEEE Transactions on Industry Applications, Vol: 39, Pages: 994-1004, ISSN: 0093-9994
  • Conference paper
    Astolfi A, Ortega R, 2003,

    Invariant manifolds, asymptotic immersion and the (adaptive) stabilization of nonlinear systems

    , Berlin, 4th workshop on nonlinear control network (NCN4 2001), University of Sheffield, Shefield, England, 25 - 28 June 2001, Publisher: Springer-Verlag Berlin, Pages: 1-20
  • Journal article
    Bathurst GN, Strbac G, 2003,

    Value of combining energy storage and wind in short-term energy and balancing markets

    , Electric Power Systems Research, Vol: 67, Pages: 1-8, ISSN: 0378-7796

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