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  • Journal article
    DEPINHO MDR, VINTER RB, 1995,

    AN EULER-LAGRANGE INCLUSION FOR OPTIMAL-CONTROL PROBLEMS

    , IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 40, Pages: 1191-1198, ISSN: 0018-9286
  • Journal article
    CAITI A, CANEPA G, DEROSSI D, GERMAGNOLI F, MAGENES G, PARISINI Tet al., 1995,

    TOWARDS THE REALIZATION OF AN ARTIFICIAL TACTILE SYSTEM - FINE-FORM DISCRIMINATION BY A TENSORIAL TACTILE SENSOR ARRAY AND NEURAL INVERSION ALGORITHMS

    , IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS, Vol: 25, Pages: 933-946, ISSN: 0018-9472
  • Journal article
    REAY DS, MIRKAZEMIMOUD M, GREEN TC, WILLIAMS BWet al., 1995,

    SWITCHED RELUCTANCE MOTOR CONTROL VIA FUZZY ADAPTIVE SYSTEMS

    , IEEE CONTROL SYSTEMS MAGAZINE, Vol: 15, Pages: 8-14, ISSN: 1066-033X
  • Journal article
    GUGLIELMI G, PARISINI T, ROSSI G, 1995,

    KEYNOTE PAPER - FAULT-DIAGNOSIS AND NEURAL NETWORKS - A POWER-PLANT APPLICATION

    , CONTROL ENGINEERING PRACTICE, Vol: 3, Pages: 601-620, ISSN: 0967-0661
  • Journal article
    JAIMOUKHA IM, KASENALLY EM, 1995,

    OBLIQUE PROJECTION METHODS FOR LARGE-SCALE MODEL-REDUCTION

    , SIAM JOURNAL ON MATRIX ANALYSIS AND APPLICATIONS, Vol: 16, Pages: 602-627, ISSN: 0895-4798
  • Conference paper
    Fletcher JE, Williams BW, Green TC, 1995,

    Steady state efficiency of a synchronous reluctance drive

    , ISSN: 0963-3308

    The performance of a synchronous reluctance drive can be optimized with regard to such parameters as power factor and transient response (or rate of change of torque). Constant current in inductive axis control yields the best transient response and is often termed vector control. Empirical models are derived to consider the effect of different control schemes on such parameters as steady state losses and low speed torque ripple.
  • Journal article
    Selhi H, Christopoulos C, Howe AF, Hui SYRet al., 1995,

    Development of an induction motor drive phase model based on the TLM method

    , International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Vol: 8, Pages: 29-49, ISSN: 0894-3370

    This paper describes a phase model of an induction motor based on Transmission‐Line Modelling technique. Its main advantage compared to the existing TLM d‐q model is the possibility of using a small part of the stator self‐inductance of each pahase as a link model to connect the motor to external sources and drives. Unlike the d‐q model, the phase model does not therefore require any additional components for connection purposes. The application of the phase model is demonstrated by and example representing a traction drive ciruit. Identical simulation results to those obtained from a different study based on a d‐q model are derived. Copyright © 1995 John Wiley & Sons, Ltd
  • Journal article
    Woolfson MS, Hui SYR, 1995,

    Solution of the differential Riccati equation using the transmission line modelling (TLM) technique

    , Communications in Numerical Methods in Engineering, Vol: 11, Pages: 25-32, ISSN: 1069-8299

    In this communication, the application of the transmission line modelling (TLM) technique to the solution of the differential Riccati equation is described. A comparison is made between the TLM, fourth‐order Runge‐Kutta and the first‐order Gear methods, for the case where one is applying the Kalman filter to the estimation of a voltage in a passive analogue circuit. In the particular example studied, the state equation is second‐order. It is found that, when the system is underdamped, the fourth‐order Runge‐Kutta method has the best performance, followed by the TLM method. When the system is overdamped and stiff, the TLM method yields results that are closest to the analytical solution. Finally, a discussion is presented of the effects of errors in the TLM solution of the Riccati equation on the accuracy of the solution to the continuous Kalman filter estimation equation. Copyright © 1995 John Wiley & Sons, Ltd
  • Journal article
    Hui SYR, Christopoulos C, 1995,

    Discrete-time simulation of an inverter-fed synchronous motor drive

    , Electric Machines and Power Systems, Vol: 23, Pages: 81-91, ISSN: 0731-356X

    This paper describes the discrete simulation of an inverter-fed synchronous motor drive using the transmission-line modelling (TLM) method. The TLM approach enables the drive model to to developed without setting up any differential equations. Comparison of the TLM and Runge Kutta 2nd and 4th order methods shows that TLM method is more efficient in terms of model derivation and computing time. Examples of simulations are included and they agree well with measurements. © 1995 Taylor & Francis Group, LLC.
  • Journal article
    Hui SYR, Christopoulos C, 1995,

    Modeling Non-Linear Power Electronic Circuits with the Transmission-Line Modeling Technique

    , IEEE Transactions on Power Electronics, Vol: 10, Pages: 48-54, ISSN: 0885-8993

    This paper describes a non-linear transmission-line modeling technique that can be employed to model power electronic circuits. The non-linearities that can be dealt with include the switching action of the power devices as well as the non-linear behavior of saturable inductors and multi-layer capacitors. With this new non-linear technique, the transmission-line modeling technique can now be used as a generalized discrete-time modeling tool for power electronic circuits. The non-linear technique is demonstrated in two examples and the simulations are found to be good. © 1995, IEEE. All rights reserved.
  • Journal article
    Zhu JG, Ramsden VS, 1995,

    A Dynamic Equivalent Circuit Model for Solid Magnetic Cores for High Switching Frequency Operations

    , IEEE Transactions on Power Electronics, Vol: 10, Pages: 791-795, ISSN: 0885-8993

    This paper presents a dynamic equivalent circuit model of solid magnetic cores for high frequency operations in power electronic circuits. The effects of eddy current, domain wall motion, and hysteresis are taken into account by distributed equivalent resistors and distributed nonideal differential inductors, respectively. The Preisach hysteresis model is employed to simulate hysteresis effects in the inductors. A recently developed discrete transform technique based on the transmission line method is adopted to develop a discrete model for numerical dynamic analysis. The resultant model is just a simple tridiagonal system of equations. Good agreement between computer simulations and measurements has confirmed the validity of the new model. © 1995 IEEE
  • Conference paper
    Sathiakumar S, Pasalic F, Hui SYR, 1995,

    Comparative study of asynchronous and synchronous discrete delta modulation schemes for DC-AC power conversion

    , Pages: 339-344, ISSN: 0275-9306

    This paper presents a comparative study on the performance of two discrete delta modulation (DDM) schemes for DC-AC power conversion, namely the asynchronous (ADDM) scheme and the synchronous (SDDM) scheme. The ADDM scheme operates with asynchronous switching frequency and generates harmonics that spread over a wide range of frequency. The SDDM scheme operates with constant switching frequency and generates harmonics at well defined frequencies that correspond to the switching frequency and its multiples. Both schemes have been implemented successfully in a TMS320C25 processor. Experimental and computed results are presented. The advantages and disadvantages of both schemes are discussed.
  • Conference paper
    Hui SYR, Oppermann I, Pasalic F, Sathiakumar Set al., 1995,

    Microprocessor-based random PWM schemes for DC-AC power conversion

    , Pages: 307-312, ISSN: 0275-9306

    This paper compares and evaluates two classes of microprocessor-based random PWM (RPWM) real-time generation schemes for DC-AC power conversion. The practical performance of the RPWM schemes based on mathematical and logical approaches are examined. The proposed schemes exhibit excellent EMC and harmonic content with all low and high order harmonics suppressed, and are suitable for both MOSFET and IGBT inverters.
  • Conference paper
    FLETCHER JE, WILLIAMS BW, GREEN TC, 1995,

    Loss reduction in a synchronous reluctance drive system using DSP control

    , 26th Annual IEEE Power Electronics Specialists Conference (PESC 95), Publisher: I E E E, Pages: 402-407, ISSN: 0275-9306
  • Conference paper
    Alessandri A, Parisini T, Zoppoli R, 1995,

    Neural approximators for nonlinear finite-memory state estimation

    , 34th IEEE Conference on Decision and Control, Publisher: I E E E, Pages: 1258-1265
  • Conference paper
    Halikias GD, Jaimoukha IM, 1995,

    Hierarchical optimisation in H-infinity

    , 34th IEEE Conference on Decision and Control, Publisher: I E E E, Pages: 3664-3669
  • Conference paper
    Fletcher JE, Williams BW, Green TC, 1995,

    Efficiency aspects of vector control applied to synchronous reluctance motors

    , 1995 IEEE Industry Applications Conference/30th IAS Annual Meeting, Publisher: I E E E, Pages: 294-300, ISSN: 0197-2618
  • Conference paper
    RAHIM NA, GREEN TC, WILLIAMS BW, 1995,

    Three-phase step-down reversible AC/DC power converter

    , 26th Annual IEEE Power Electronics Specialists Conference (PESC 95), Publisher: I E E E, Pages: 973-978, ISSN: 0275-9306
  • Conference paper
    Bolla R, Davoli F, Maryni P, Parisini Tet al., 1995,

    Neural approximations of optimal allocation policies for hybrid multiplexing

    , IEEE Global Telecommunications Conference, Publisher: I E E E, Pages: 1327-1331
  • Conference paper
    ALESSANDRI A, PARISINI T, 1995,

    Nonlinear modelling and state estimation in a real power plant using neural networks and stochastic approximation

    , 1995 American Control Conference, Publisher: AMER AUTOMATIC CONTROL COUNCIL, Pages: 1561-1567
  • Conference paper
    CAITI A, PARISINI T, 1995,

    Approximation of inverse maps through RBF neural networks

    , 1995 IEEE International Symposium on Circuits and Systems (ISCAS-1995), Publisher: I E E E, Pages: 1960-1963, ISSN: 0277-674X
  • Conference paper
    Pytlak R, Vinter RB, 1995,

    Second-order method for optimal control problems with state constraints and piecewise-constant controls

    , 34th IEEE Conference on Decision and Control, Publisher: I E E E, Pages: 625-630
  • Conference paper
    Parisini T, Sanguineti M, Zoppoli R, 1995,

    Nonlinear stabilization by receding-horizon neural regulators

    , 34th IEEE Conference on Decision and Control, Publisher: I E E E, Pages: 2433-2441
  • Conference paper
    Karbowski A, Malowidzki M, Bolla R, Davoli F, Parisini Tet al., 1995,

    A hierarchical neural optimization structure for access control and resource sharing in integrated communication networks

    , 7th IFAC/IFORS/IMACS Symposium on Large Scale Systems - Theory and Applications 1995, Publisher: PERGAMON PRESS LTD, Pages: 889-894
  • Conference paper
    Rahim NA, Green TC, Williams BW, 1995,

    Simplified analysis of the three-phase PWM switching converter

    , 1995 IEEE 21st International Conference on Industrial Electronics, Control, and Instrumentation, Publisher: IEEE, Pages: 482-487, ISSN: 1553-572X
  • Conference paper
    Rahim NA, Green TC, Williams BW, 1994,

    Three-phase to DC converter combining controlled step-down of voltage and bi-directional power flow

    , Pages: 295-300, ISSN: 0537-9989

    A new configuration for a three-phase bi-directional power converter (AC-DC and DC-AC) is presented. The converter is operated as a step-down converter where the output voltage can be controlled in the range of 0 to 1.5 Vph. The power switch configuration is simpler than the conventional anti-parallel bridge used for bi-directional step-down rectification. It has nine controllable switches and twelve diodes. In the rectifier and inverter mode, line current can be sinusoidally regulated with unity displacement factor. This complies with the EN standard on harmonic currents. Synchronous PWM is implemented in a field programmable gate array and regulation of the output is achieved with a PID controller. Simulation and experimental results are provided to demonstrate the effectiveness of the proposed converter system.
  • Journal article
    FERREIRA MMA, VINTER RB, 1994,

    WHEN IS THE MAXIMUM PRINCIPLE FOR STATE CONSTRAINED PROBLEMS NONDEGENERATE

    , JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS, Vol: 187, Pages: 438-467, ISSN: 0022-247X
  • Journal article
    CAITI A, PARISINI T, 1994,

    MAPPING OCEAN SEDIMENTS BY RBF NETWORKS

    , IEEE JOURNAL OF OCEANIC ENGINEERING, Vol: 19, Pages: 577-582, ISSN: 0364-9059
  • Journal article
    PARISINI T, ZOPPOLI R, 1994,

    NEURAL NETWORKS FOR FEEDBACK FEEDFORWARD NONLINEAR CONTROL-SYSTEMS

    , IEEE TRANSACTIONS ON NEURAL NETWORKS, Vol: 5, Pages: 436-449, ISSN: 1045-9227
  • Conference paper
    Finney SJ, Williams BW, Green TC, 1994,

    IGBT turn-off characteristics and high frequency application

    , ISSN: 0963-3308

    Use of a parallel MOSFET can provide a method of reducing the turn off loss associated with IGBTs and achieve a composite effect of low on-state loss and low switching loss. The technique discussed in this paper will be able to increase the effective minimum on-time of the device and this in itself can provide a limitation on the switching frequencies that can be achieved.

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