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  • Conference paper
    Silva GN, Vinter RB, 1997,

    Necessary Conditions for Optimal Impulsive Control Problems

    , Proc. 36th Conf. on Decision and Control, San Diego
  • Book
    Astolfi A, Limebeer DJN, Melchiorri C, Tornambe A, Vinter RBet al., 1997,

    Discontinuous control of the nonholonomic integrator: Modelling and Control of Mechanical Systems

    , Publisher: World Scientific Publisher
  • Conference paper
    Mavrikis P, Vinter RB, 1997,

    Trajectory Specific Model Reduction

    , Proc. 36th IEEE Conf. on Decision and Control
  • Journal article
    Silva GN, Vinter RB, 1997,

    Necessary Conditions for Optimal Impulsive Control Problems

    , SIAM Journal on Control and Optimization
  • Journal article
    Jaimoukha IM, Kasenally EM, 1997,

    Implicitly Restarted Krylov Subspace Methods for Stable Partial Realizations

    , SIAM Journal on Matrix Analysis and Application, Vol: 18, Pages: 633-652
  • Journal article
    Vinter RB, Zheng H, 1997,

    Necessary Conditions for Optimal Control Problems with State Constraints

    , Trans.American Mathematical Society
  • Conference paper
    Parisini T, Polycarpou M, Sanguineti M, Vemuri Aet al., 1997,

    Robust parametric and non-parametric fault diagnosis in nonlinear input-output systems

    , 36th IEEE Conference on Decision and Control, Publisher: IEEE, Pages: 4481-4482, ISSN: 0191-2216
  • Journal article
    Ellis R, Simpson R, Culverhouse PF, Parisini Tet al., 1997,

    Committees, collectives and individuals: Expert visual classification by neural network

    , NEURAL COMPUTING & APPLICATIONS, Vol: 5, Pages: 99-105, ISSN: 0941-0643
  • Conference paper
    Inggs MR, Kerrigan EC, 1997,

    Laboratory implementation of a synthetic aperture imaging sonar

    , Pages: 89-94
  • Conference paper
    Parisini T, Sacone S, 1997,

    A stable two-level hybrid controller for nonlinear discrete-time systems

    , 36th IEEE Conference on Decision and Control, Publisher: IEEE, Pages: 1234-1236, ISSN: 0191-2216
  • Conference paper
    Parisini T, Alessandri A, Maggiore M, Zoppoli Ret al., 1997,

    On convergence of neural approximate nonlinear state estimators

    , 1997 American Control Conference, Publisher: I E E E, Pages: 1819-1822, ISSN: 0743-1619
  • Conference paper
    Astolfi A, 1997,

    Discontinuous control of the Brockett integrator

    , 36th Conference on Decision and Control, San Diego, CA
  • Conference paper
    Salehzadeh-Nobari S, Chambers JA, Green TC, Goodfellow JK, Smith WEDet al., 1997,

    Implementation of frequency domain adaptive control in vibration test products

    , Factory 2000, IEE Coll., Cambridge
  • Journal article
    Jaimoukha IM, 1997,

    A general minimal residual Krylov subspace method for large-scale model reduction

    , IEEE Trans.Automatic Control, Vol: 42, Pages: 1422-1427
  • Conference paper
    Baglietto M, Parisini T, Zoppoli R, 1997,

    Nonlinear approximations for the solution of team optimal control problems

    , 36th IEEE Conference on Decision and Control, Publisher: IEEE, Pages: 4592-4594, ISSN: 0191-2216
  • Conference paper
    Alessandri A, Parisini T, 1997,

    Model-based fault diagnosis using nonlinear estimators: A neural approach

    , 1997 American Control Conference, Publisher: I E E E, Pages: 903-907, ISSN: 0743-1619
  • Journal article
    Hui SYR, Gogani ES, Zhang J, 1996,

    Analysis of a quasi-resonant circuit for soft-switched inverters

    , IEEE Transactions on Power Electronics, Vol: 11, Pages: 106-114, ISSN: 0885-8993

    This paper presents an analysis of a quasi-resonant circuit for soft-switched inverters. The quasi-resonant circuit provides zero-voltage instants for zero-voltage inverter switching by pulling down the dc link voltage momentarily to zero without increasing the peak value of the nominal dc link voltage. Switches in the quasi-resonant circuit can also be turned off at zero current/voltage conditions. The proposed circuit allows creation of zero voltage conditions for inverter soft-switching under loaded and no-load conditions. The operating principle of this circuit is explained, and the analysis of each operating mode is described. Design criteria for achieving zero voltage switching are derived from the general mathematical analysis. Operation of the circuit has been verified by PSPICE simulation and experiments. © 1996 IEEE.
  • Journal article
    Zhu JG, Hui SYR, Ramsden VS, 1996,

    A generalized dynamic circuit model of magnetic cores for low- and high-frequency applications - Part I: Theoretical calculation of the equivalent core loss resistance

    , IEEE Transactions on Power Electronics, Vol: 11, Pages: 246-250, ISSN: 0885-8993

    This paper describes the theoretical calculation of the equivalent core loss resistance for a dynamic magnetic core loss model. The equivalent core loss resistance incorporates the effects of both the classical eddy current and anomalous losses. Derivation of a generalized nonlinear core loss resistance expression is presented. This new equivalent core loss resistance can be incorporated into a generalized dynamic magnetic core circuit model suitable for low and high frequency applications (Part II of this paper). © 1996 IEEE.
  • Journal article
    Hui SYR, Zhu JG, Ramsden VS, 1996,

    A generalized dynamic circuit model of magnetic cores for low- and high-frequency applications - Part II: Circuit model formulation and implementation

    , IEEE Transactions on Power Electronics, Vol: 11, Pages: 251-259, ISSN: 0885-8993

    This paper describes the formulation and implementation of a generalized dynamic magnetic core circuit model suitable for both low- and high-frequency applications. The behavior of magnetic cores with any arbitrary flux waveforms is modeled by a simple ladder network consisting of nonlinear inductors and resistors. The nonlinear B-H loop and the hysteresis loss are incorporated in distributed nonideal inductors and calculated by the Preisach scalar model of magnetic hysteresis. The eddy current and anomalous losses are accounted for by the generalized nonlinear equivalent resistors reported in Part I of the paper. The transmission line modeling (TLM) method is employed to solve the nonlinear state equations. Numerical aspects and software implementation of the model are discussed. The generalized model has been verified by simulations and measurements at both lowand high-frequency operations. © 1996 IEEE.
  • Journal article
    Fung KK, Hui SYR, 1996,

    Fast simulation of multistage power electronic systems with widely separated operating frequencies

    , IEEE Transactions on Power Electronics, Vol: 11, Pages: 405-412, ISSN: 0885-8993

    This paper presents a fast and efficient way of simulating multistage power electronic circuits with different stages operating at widely separated frequencies, using the transmission-line modeling (TLM) technique. A multistage circuit can be modeled as several smaller subcircuits, which can then be simulated individually with different time steps according to their circuit time constants. Energy exchange between linked subcircuits are made possible via the use of a new TLM stub link conversion technique and improved TLM link algorithms. The proposed technique has been tested successfully in a simulation of a switched-mode power supply. Simulation results confirm that the new approach can greatly reduce the computing time of the simulation when compared with conventional TLM simulation methods. A reduction of about two-thirds of the computing time has been achieved in the simulation of a three-stage switched-mode power supply. © 1996 IEEE.
  • Journal article
    Shrivastva Y, Sathiakumar S, Hui SYR, 1996,

    Random discrete PWM method for DC-DC power converters

    , Electronics Letters, Vol: 32, Pages: 2105-2106, ISSN: 0013-5194

    A random discrete pulse-width modulation (RDPWM) scheme is examined and compared with the randomised pulse-position modulation (RPPM) method for DC-DC power conversion. The RDPWM method has no switching harmonics while the RPPM method has significant switching harmonics. Power spectral characteristics of the two methods are presented and discussed.
  • Journal article
    Culverhouse PF, Simpson RG, Ellis R, Lindley JA, Williams R, Parisini T, Reguera B, Bravo I, Zoppoli R, Earnshaw G, McCall H, Smith Get al., 1996,

    Automatic classification of field-collected dinoflagellates by artificial neural network

    , MARINE ECOLOGY PROGRESS SERIES, Vol: 139, Pages: 281-287, ISSN: 0171-8630
  • Journal article
    Parisini T, Zoppoli R, 1996,

    Neural approximations for multistage optimal control of nonlinear stochastic systems

    , IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 41, Pages: 889-895, ISSN: 0018-9286
  • Journal article
    Fung KK, Hui SYR, 1996,

    Improved TLM link model for reactive circuit components

    , IEE Proceedings: Science, Measurement and Technology, Vol: 143, Pages: 341-344, ISSN: 1350-2344

    An improved transmission line modelling (TLM) link model for reactive circuit components is presented. This improved model reduces the propagation delay error in the conventional TLM link model. Consequently the improved model provides significant improvement in accuracy over the conventional link model. Simulation confirms that results obtained from the improved link model are much more accurate than those from the conventional link model. The simulation results also indicate that the improved link model is as accurate as the stub model. © IEE, 1996.
  • Journal article
    Woolfson MS, Hui SYR, 1996,

    Application of the transmission line method to the solution of the continuous Kalman filter equations of general order

    , Mathematics and Computers in Simulation, Vol: 42, Pages: 15-33, ISSN: 0378-4754

    In this paper, the transmission line method (TLM) is applied to the solution of the general, nth order, continuous Kalman filter estimation equations. A comparison is made between this method, the first-order Gear algorithm and the fourth-order Runge-Kutta method, in the estimation of the voltage drop and its derivative across a capacitor in an LCR circuit. An analysis is made of the sensitivity of the algorithms to changing time step and measurement error variance. In most cases, the Runge- Kutta method has the best performance at the expense of computing time. However, in some cases, the new algorithm yields less biased and smoother estimates. The TLM algorithm performs consistently better than the Gear method for the particular problem analysed. The CPU time for the TLM algorithm has also been compared with that required by the Gear and Runge-Kutta methods; the TLM method is found to take approximately 25% of the time required by the Runge-Kutta method to process one measurement. The TLM algorithm appears to present a compromise between accuracy of estimation and computing time. Finally, suggestions are made for further work.
  • Journal article
    Fung KK, Hui SYR, Christopoulos C, 1996,

    Concurrent programming and simulation of decoupled power electronic circuits

    , IEE Proceedings: Science, Measurement and Technology, Vol: 143, Pages: 131-136, ISSN: 1350-2344

    The authors describe the parallel simulation of a multistage power electronic circuit using the transmission line modelling (TLM) method. In this approach, a large stiff circuit can be decoupled into smaller subcircuits by TLM links. Each subcircuit is then formulated with a small system matrix and simulated in one program module. The overall simulation is done by running all the program modules in parallel. This parallel simulation allows significant speed improvements over normal sequential simulation, as shown by the results of numerical experimentation. © IEE, 1996.
  • Journal article
    Fung KK, Hui SYR, 1996,

    Transputer simulation of decoupled electrical circuits

    , Mathematics and Computers in Simulation, Vol: 42, Pages: 1-13, ISSN: 0378-4754

    This paper describes a parallel simulation of an electrical circuit using the Transmission Line Modelling (TLM) method. The TLM method is used to decouple the circuit into sub-circuits which are then simulated concurrently in a parallel processing system. This approach not only simplifies the circuit formulation process but also reduces the overall computing time of the circuit simulation when compared with traditional sequential method. The techniques for decoupling the circuit and implementing the parallel algorithm are described. The method is demonstrated in an electrical circuit simulation. Comparison of the computing time and simulated results with the sequential approach confirms the computing efficiency and accuracy of the proposed method.
  • Conference paper
    Soto D, Green TC, Coonick AH, 1996,

    Multi-level Converter and Larger Power Inverters

    , Power Electronics and Variable-Speed Drives Conference (PEVD 96), IEE Conf. Nottingham, U.K, Pages: 354-359
  • Journal article
    Sun XD, Woodgate KG, Allwright JC, 1996,

    Nonlinear inverse dynamics control of aircraft using spoilers

    , Journal of Guidance, Control and Dynamics, Pages: 475-482
  • Book
    Astolfi A, 1996,

    Control of Hamiltonian Systems

    , Publisher: World Scientific Publisher

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