Search or filter publications

Filter by type:

Filter by publication type

Filter by year:

to

Results

  • Showing results for:
  • Reset all filters

Search results

  • Journal article
    Angeli D, 2002,

    A Lyapunov approach to incremental stability properties

    , IEEE Transactions on Automatic Control, Vol: 47, Pages: 410-421, ISSN: 0018-9286

    This paper deals with several notions of incremental stability. In other words, the focus is on stability of trajectories with respect to one another, rather than with respect to some attractor. The aim is to present a framework for understanding such questions fully compatible with the well-known input-to-state stability (ISS) approach. Applications of the newly introduced stability notions are also discussed.
  • Journal article
    Zoppoli R, Sanguineti M, Parisini T, 2002,

    Approximating networks and extended Ritz method for the solution of functional optimization problems

    , JOURNAL OF OPTIMIZATION THEORY AND APPLICATIONS, Vol: 112, Pages: 403-440, ISSN: 0022-3239
  • Journal article
    Yan W, Hui SYR, Chung H, Cao XHet al., 2002,

    Genetic algorithm optimised high-intensity-discharge lamp model

    , Electronics Letters, Vol: 38, Pages: 110-112, ISSN: 0013-5194

    Based on the physical laws of plasma arc discharge, a simple and user-friendly high-intensity-discharge (HID) lamp model optimised by genetic algorithms has been developed. The proposed model can predict lamp terminal characteristics accurately for both low and high frequency operation. All model parameters can be obtained from simple terminal measurements of the HID lamps without manufacturers' confidential data. The proposed model provides a powerful tool for simulating the electrical behaviour of the HID lamps.
  • Journal article
    Cao X, Yan W, Hui SYR, Chung Het al., 2002,

    Dimming control and characteristics of high-frequency operated metal halide lamps

    , PESC Record - IEEE Annual Power Electronics Specialists Conference, Vol: 3, Pages: 1155-1160, ISSN: 0275-9306

    Dimming control and characteristics of high-frequency operated metal-halide (MH) lamps are described. Lamp performance based on two ballast topologies is compared. The dimming range and stability control of the MH lamps are addressed. Dimming range from 100% to about 30% has been achieved. It is found that the combination of ballast topology and dimming method can affect the dimming performance.
  • Journal article
    Lee STS, Chung HSH, Hui SYR, 2002,

    A novel electrode power profiler for dimmable ballasts using DC link voltage and switching frequency controls

    , PESC Record - IEEE Annual Power Electronics Specialists Conference, Vol: 1, Pages: 192-197, ISSN: 0275-9306

    A novel electrode power profiler for dimmable ballasts using series-resonant parallel-loaded inverter is presented. Dimming of fluorescent lamps and control of the electrode power are achieved by simultaneously adjusting the dc link voltage and the switching frequency of the inverter. The current gradient along the electrode, which is due to the distributed lamp current property on the electrode, is deliberated in formulating the power and voltage models of the electrode. As the electrode heating relies on two near-orthogonal current components including the lamp current and the resonant tank circuit current, a simple feedback control is developed to derive the electrode power. Reduction of the electrode power (due to the decrease in the lamp current) during dimming is compensated by increasing the switching frequency of the inverter, in order to increase the resonant tank circuit current. Experimental results of a T8 36W prototype are verified with theoretical predictions.
  • Journal article
    Lee CK, Hui SYR, Chung HSH, Shrivastava Yet al., 2002,

    A randomized voltage vector switching scheme for three-level power inverters

    , IEEE Transactions on Power Electronics, Vol: 17, Pages: 94-100, ISSN: 0885-8993

    In this paper, a feasibility study of a randomized space vector switching scheme for three-level inverters is reported. Based on the traditional space vector concept for pulse width modulation (PWM) inverter, the sequence of the space vector is randomized in this scheme. The overall vector, resulting from the randomization, is mathematically identical to that of the traditional space vector. It has been found that the randomized scheme can effectively spread the switching noise over a wide frequency range and at the same time keep the steady-state link capacitor voltage balanced. The proposed scheme has been implemented in real time in a digital controller and its features have been experimentally confirmed.
  • Journal article
    Cao X, Yan W, Hui SYR, Chung Het al., 2002,

    Lamp arc resistance modelling of high-intensity-discharge (HID) lamps

    , IEE Proceedings: Science, Measurement and Technology, Vol: 149, Pages: 45-48, ISSN: 1350-2344

    Based on a simplified approach to the prediction of acoustic resonance frequency distribution, a frequency-dependent lamp arc model of a low-wattage metal-halide (MH) lamp is presented. Verified with measurements, this approach provides a useful lamp-arc-resistance model for electronic ballast designers to predict and simulate the unstable frequency regions of high-intensity-discharge lamps and to design appropriate control for the ballast.
  • Journal article
    Astolfi A, Ortega R, 2002,

    Energy-based stabilization of angular velocity of rigid body in failure configuration

    , JOURNAL OF GUIDANCE CONTROL AND DYNAMICS, Vol: 25, Pages: 184-187, ISSN: 0731-5090
  • Conference paper
    Ling KV, Falugi P, Maciejowski JM, Chisci Let al., 2002,

    Robust predictive control of the furuta pendulum

    , Pages: 37-42, ISSN: 1474-6670

    In this paper, a Linear Parameter Varying (LPV) model of the Furuta pendulum is derived. Based on this model, a balancing controller is designed using robust predictive control techniques. Invariant set theory is used to accurately characterise the region of the state space in which the balancing controller is effective. An energy-based control law is used to swing up the pendulum. Invariant sets calculated for the balancing controller can be exploited to systematically determine the switching condition between swing up and balancing controllers. In practice, the pendulum may be swung towards the upright position with varying speed and the speed of the rotating arm may also vary. Based on this physical insight, the speed of the rotating arm is chosen as gain scheduling variable. It is shown that this strategy is effective in achieving a more consistent swing up and balancing behaviour which is not sensitive to the performance of the swing up controller.
  • Conference paper
    Rodrigues AO, Malta LRP, Borsali R, Takai RB, Conhalato R, Rodrigues LOC, Freeman EM, Green T, Vasconcelos JA, Ramirez JAet al., 2002,

    3D simulation of SAR induced by mobile phones in the human head

    This paper presents a thorough investigation of 3D calculation of the specific absorption rate (SAR) distribution in a realistic model of the human head exposed to electromagnetic fields generated by mobile phones. The calculation was made using the FDTD. The source was modeled with a power of 600 mW, as a monopole fed with a current of 300 mA, and variable frequency in the range of 800 MHz to 1.8 GHz. The human head model has a precision of 1.11 mm x 1.86 mm x 1.11 mm in the x, y and z directions, respectively; and is composed of 12 different tissues: air, bone, ERL, brain, skin, muscle, fat and eye (composed of cornea, anterior chamber, lens, vitreous body and sclera). This very fine model allows accurate SAR calculation in different tissues which may have been overlooked in other models.
  • Book chapter
    Falugi P, Giarré L, Chisci L, Zappa Get al., 2002,

    LPV predictive control of the stall and surge for jet engine

    , Periodic Control Systems 2001 (PSYCO 2001) A Proceedings Volume from the IFAC Workshop, Cernobbio-Como, Italy, 27-28 August 2001, Editors: Bittanti, Colaneri, Pages: 31-36, ISBN: 9780080436821
  • Journal article
    Chisci L, Falugi P, Zappa G, 2002,

    Redecing-horizon control of constrained uncertain linear systems with disturbances

    , KYBERNETIKA, Vol: 38, Pages: 169-185, ISSN: 0023-5954
  • Conference paper
    Falugi P, Giarré L, Chisci L, Zappa Get al., 2002,

    LPV predictive control of the stall and surge for jet engine

    , IFAC Workshop on Periodic Control Systems, Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: 31-36, ISSN: 1369-4960
  • Conference paper
    Patan K, Parisini T, 2002,

    Stochastic learning methods for dynamic neural networks: simulated and real-data comparisons

    , 20th Annual American Control Conference (ACC), Publisher: IEEE, Pages: 2577-2582, ISSN: 0743-1619
  • Conference paper
    Kaliora G, Astolfi A, 2002,

    Stabilization with positive and quantized control

    , New York, 41st IEEE conference on decision and control, Las Vegas, Nevada, 10 - 13 December 2002, Publisher: IEEE, Pages: 1892-1897
  • Conference paper
    Baglietto M, Cervellera C, Parisini T, Sanguineti M, Zoppoli Ret al., 2002,

    Approximating networks for the solution of T-stage stochastic optimal control problems

    , IFAC Workshop on Adaptation and Learning in Control and Signal Processing, Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: 107-114
  • Conference paper
    Karagiannis D, Astolfi A, Ortega R, 2002,

    Adaptive output feedback stabilization of a class of nonlinear systems

    , New York, 41st IEEE conference on decision and control, Las Vegas, Nevada, 10 - 13 December 2002, Publisher: IEEE, Pages: 1491-1496
  • Conference paper
    Kerrigan EC, Mayne DQ, 2002,

    Optimal control of constrained, piecewise affine systems with bounded disturbances

    , 41st IEEE conference on decision and control, Las Vegas, Nevada, 10 - 13 December 2002, Publisher: IEEE Control Systems Society, Pages: 1552-1557
  • Conference paper
    Antonelli R, Harmand J, Steyer JP, Astolfi Aet al., 2002,

    Output feedback regulation of an anaerobic digestion process

    , New York, 20th annual american control conference (ACC), Anchorage, Alaska, 8 - 10 May 2002, Publisher: IEEE, Pages: 4062-4067
  • Conference paper
    Strbac G, 2002,

    Impact of dispersed generation on distribution systems: a European perspective

    , Winter meeting of the IEEE Power Engineering Society; New York, NY, Publisher: Institute of Electrical and Electronics Engineers; 2002, Pages: 118-120
  • Conference paper
    Galbraith GN, Vinter RB, 2002,

    Lipschitz regularity of optimal controls

    , New York, 41st IEEE conference on decision and control, Las Vegas, Nevada, 10 - 13 December 2002, Publisher: IEEE, Pages: 3121-3126
  • Conference paper
    Noroozian M, Halvarsson P, Rehtanz C, Pal BCet al., 2002,

    Incorporating new development in control theory and wide-area measurement in SVC function for improving power system performance

    , Power engineering conference in China
  • Conference paper
    Vinter RB, 2002,

    Necessary conditions for mini-max optimal control problems

    , New York, 41st IEEE conference on decision and control, Las Vegas, Nevada, 10 - 13 December 2002, Publisher: IEEE, Pages: 4733-4737
  • Conference paper
    Rodriques AO, Ramirez J, Green TC, Freeman EMet al., 2002,

    SAR calculation in realistic model of the head of mobile phone users

    , IEEE CEFC2002 Perugia, Italy, 16 - 19 June 2002
  • Conference paper
    Astolfi A, Colaneri P, 2002,

    A note on existence of positive realizations

    , American control conference, Anchorage, AK, Publisher: IEEE, Pages: 1068-1073
  • Conference paper
    Zhong QC, Green TC, Liang J, Weiss Get al., 2002,

    H-infinity control of the neutral point in 3-phase 4-wire DC-AC converters

    , New York, 28th annual conference of the IEEE Industrial-Electronics-Society, Seville, Spain, 5 - 8 November 2002, Publisher: IEEE, Pages: 520-525
  • Conference paper
    Zhong QC, Green TC, Liang J, Weiss Get al., 2002,

    Robust repetitive control of grid-connected DC-AC converters

    , New York, 41st IEEE conference on decision and control, Las Vegas, Nevada, 10 - 13 December 2002, Publisher: IEEE, Pages: 2468-2473
  • Journal article
    Astolfi A, Ortega R, Sepulchre R, 2002,

    Stabilization and disturbance attenuation of nonlinear systems using dissipativity theory

    , EUROPEAN JOURNAL OF CONTROL, Vol: 8, Pages: 408-431, ISSN: 0947-3580
  • Conference paper
    Astolfi A, Ortega R, Becherif M, 2002,

    Low speed sensorless control of a class of electrical machines

    , 10th international power electronics and motion control conference, Dubrovnik, CR, Publisher: PEMC
  • Conference paper
    Prodanovic M, Green TC, 2002,

    Control of power quality in inverter-based distributed generation

    , 28th annual conference of the IEEE Industrial-Electronics-Society (IEEE IECON), Seville, Spain, 5 - 8 November 2002, Publisher: IEEE, Pages: 1185-1189

This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.

Request URL: http://www.imperial.ac.uk:80/respub/WEB-INF/jsp/search-t4-html.jsp Request URI: /respub/WEB-INF/jsp/search-t4-html.jsp Query String: id=955&limit=30&page=64&respub-action=search.html Current Millis: 1745008232433 Current Time: Fri Apr 18 21:30:32 BST 2025