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  • Conference paper
    Reay DS, Green TC, Williams BW, 1994,

    Field programmable gate array implementation of a neural network accelerator

    , ISSN: 0963-3308

    The use of a neural network to learn the nonlinear current profiles required to minimise torque ripple in a switched reluctance motor (SRM), at low to medium speeds, has been demonstrated using a digital signal processor (DSP). However, the DSP (Texas Instruments TMS320C25) implementation of a neural network in this application is a limiting factor on motor speed (if maximum current profile integrity is to be maintained). Fortunately, the neural network architecture used (cerebellar model articulation controller (CMAC)) is amenable to hardware implementation a point noted by Albus in one of his original papers and evidenced by at least one previous field programmable gate array (FPGA) implementation. Guided by the requirements of the switched reluctance motor application, a prototype accelerator based on a Xilinx XC4000 FPGA implementation of the neural network has been constructed that operates an order of magnitude faster than the DSP implementation.
  • Journal article
    JAIMOUKHA IM, KASENALLY EM, 1994,

    KRYLOV SUBSPACE METHODS FOR SOLVING LARGE LYAPUNOV EQUATIONS

    , SIAM JOURNAL ON NUMERICAL ANALYSIS, Vol: 31, Pages: 227-251, ISSN: 0036-1429
  • Journal article
    GREEN TC, 1994,

    THE IMPACT OF EMC REGULATIONS ON MAINS-CONNECTED POWER CONVERTERS

    , POWER ENGINEERING JOURNAL, Vol: 8, Pages: 35-43, ISSN: 0950-3366
  • Conference paper
    Green TC, Khater MM, Williams BW, El-Shanawany MM, Hassanein AAet al., 1994,

    Five-phase switched reluctance motor: design and performance

    , ISSN: 0963-3308

    This paper presents a design and experimental results for a five-phase switched reluctance motor drive. The system improves SR drive performance by increasing the number of phases without increasing the number of switching devices. A comparison is made of the torque speed characteristics of the motor when fed from the proposed converter and a asymmetric half bridge. This study shows that the proposed converter matches the conventional converter over a very wide speed range.
  • Journal article
    Hui SYR, Fung KK, Christopoulos C, 1994,

    Decoupled Simulation of DC-Linked Power Electronic Systems Using Transmission-Line Links

    , IEEE Transactions on Power Electronics, Vol: 9, Pages: 85-91, ISSN: 0885-8993

    This paper describes the application of the transmission-line modeling (TLM) method to the decoupled simulation of d.c. linked power electronic systems. Stiff capacitively or inductively smoothed dc links in power electronic systems can be modeled as two-port transmission-line links using the TLM method. The TLM links enable the circuits connected by the links to be decoupled and simulated as individual circuits, resulting in smaller system matrices, possibility of parallel computation and reduction in computing time. Interaction between these linked circuits can be realised by exchanging the incident pulses at both ends of the transmission-line links. Computer simulations of an ac to dc converter used in a laboratory confirms the simplicity of the TLM decoupled simulation approach. © 1994 IEEE
  • Conference paper
    KHATER MM, ELSHANAWANY MM, HASSANEIN AA, GREEN TC, WILLIAMS BWet al., 1994,

    AN INTEGRATED 5-PHASE SWITCHED RELUCTANCE MOTOR DRIVE

    , 5th International Conference on Power Electronics and Variable-Speed Drives (PEVD94), Publisher: INST ELECTRICAL ENGINEERS, Pages: 125-130, ISSN: 0537-9989
  • Conference paper
    HOLLIDAY D, GREEN TC, WILLIAMS BW, 1994,

    ON-LINE MEASUREMENT OF INDUCTION MACHINE STATOR AND ROTOR WINDING PARAMETERS

    , 5th International Conference on Power Electronics and Variable-Speed Drives (PEVD94), Publisher: INST ELECTRICAL ENGINEERS, Pages: 465-469, ISSN: 0537-9989
  • Conference paper
    FINNEY SJ, WILLIAMS BW, HE X, GREEN TCet al., 1994,

    PASSIVE CIRCUIT CONFIGURATIONS FOR SNUBBER ENERGY RECOVERY IN POWER CONVERTERS USING HARD-SWITCHED DEVICES

    , 5th International Conference on Power Electronics and Variable-Speed Drives (PEVD94), Publisher: INST ELECTRICAL ENGINEERS, Pages: 453-457, ISSN: 0537-9989
  • Conference paper
    HE X, WILLIAMS BW, GREEN TC, 1994,

    POWER SWITCHING SEMICONDUCTOR MODELS FOR PSPICE, AND THEIR PARAMETRIC SENSITIVITY ANALYSIS

    , 5th International Conference on Power Electronics and Variable-Speed Drives (PEVD94), Publisher: INST ELECTRICAL ENGINEERS, Pages: 543-549, ISSN: 0537-9989
  • Conference paper
    PYTLAK R, VINTER RB, 1994,

    AN ALGORITHM FOR A GENERAL MINIMUM FUEL CONTROL PROBLEM

    , 33rd IEEE Conference on Decision and Control, Publisher: I E E E, Pages: 3616-3621, ISSN: 0191-2216
  • Conference paper
    REAY DS, MIRKAZEMIMOUD M, GREEN TC, WILLIAMS BWet al., 1994,

    FUZZY ADAPTIVE SYSTEMS APPLIED TO THE CONTROL OF A SWITCHED RELUCTANCE MOTOR

    , 1994 IEEE International Symposium on Intelligent Control, Publisher: I E E E, Pages: 81-86
  • Conference paper
    PARISINI T, ZOPPOLI R, 1994,

    NEURAL APPROXIMATIONS FOR MULTISTAGE OPTIMAL-CONTROL OF NONLINEAR STOCHASTIC-SYSTEMS

    , 1994 American Control Conference, Publisher: I E E E, Pages: 1373-1378
  • Conference paper
    ELLIS R, SIMPSON R, CULVERHOUSE PF, PARISINI T, WILLIAMS R, REGUERA B, MOORE B, LOWE Det al., 1994,

    EXPERT VISUAL CLASSIFICATION AND NEURAL NETWORKS - CAN GENERAL SOLUTIONS BE FOUND

    , Oceans 94/OSATES Conference on Oceans Engineering for Today's Technology and Tomorrow's Preservation, Publisher: I E E E, Pages: A330-A334
  • Conference paper
    CATTANEO A, PARISINI T, RAITERI R, ZOPPOLI Ret al., 1994,

    NEURAL APPROXIMATIONS FOR RECEDING-HORIZON CONTROLLERS

    , 1994 American Control Conference, Publisher: I E E E, Pages: 2144-2147
  • Conference paper
    PARISINI T, ZOPPOLI R, 1994,

    NEURAL OPTIMAL CONTROL OF NONLINEAR STOCHASTIC SYSTEMS

    , 1994 IEEE International Conference on Neural Networks (ICNN 94) - 1st IEEE World Congress on Computational Intelligence, Publisher: I E E E, Pages: 2383-2388
  • Conference paper
    ALESSANDRI A, VERONA FB, PARISINI T, TORRINI Aet al., 1994,

    NEURAL APPROXIMATIONS FOR THE OPTIMAL-CONTROL OF HEATING-SYSTEMS

    , 3rd IEEE Conference on Control Applications, Publisher: I E E E, Pages: 1613-1618
  • Conference paper
    FLETCHER JE, GREEN TC, WILLIAMS BW, 1994,

    VECTOR CONTROL OF A SYNCHRONOUS RELUCTANCE MOTOR UTILISING AN AXIALLY LAMINATED ROTOR

    , 5th International Conference on Power Electronics and Variable-Speed Drives (PEVD94), Publisher: INST ELECTRICAL ENGINEERS, Pages: 18-23, ISSN: 0537-9989
  • Conference paper
    JAIMOUKHA IM, KASENALLY EM, 1994,

    MODEL-REDUCTION OF LARGE-SCALE SYSTEMS VIA THE ARNOLDI PROCESS

    , Cornelius Lanczos 1993 International Centenary Conference, Publisher: SIAM, Pages: 384-386
  • Conference paper
    ERBATUR K, VINTER RB, KAYNAK O, 1994,

    FEEDBACK LINEARIZATION CONTROL FOR A 3-DOF FLEXIBLE-JOINT ELBOW MANIPULATOR

    , 1994 IEEE International Conference on Robotics and Automation, Publisher: I E E E, COMPUTER SOC PRESS, Pages: 2979-2984, ISSN: 1050-4729
  • Conference paper
    Holliday D, Green TC, Williams BW, 1993,

    On-line parameter measurement of induction machines

    , Pages: 992-996

    The problem of degradation in performance of an induction machine controller resulting from parameter variation is tackled using an on-line measurement technique which may be used as an alternative or supplement to parameter adaption. Experimental data shows that a test similar to the locked-rotor test may be successfully performed by injecting a low magnitude, high frequency voltage set into the motor supply. Experimental results show consistent measures of induction machine stator and rotor resistance parameters are obtained. Guidelines for maintaining accuracy under various operating conditions are discussed. A custom PWM generator is developed which improves the experimental process and a detection system using a microprocessor is proposed.
  • Journal article
    JAIMOUKHA IM, LIMEBEER DJN, 1993,

    A STATE-SPACE ALGORITHM FOR THE SOLUTION OF THE 2-BLOCK SUPEROPTIMAL DISTANCE PROBLEM

    , SIAM JOURNAL ON CONTROL AND OPTIMIZATION, Vol: 31, Pages: 1115-1134, ISSN: 0363-0129
  • Journal article
    ROWLAND JDL, VINTER RB, 1993,

    DYNAMIC OPTIMIZATION PROBLEMS WITH FREE-TIME AND ACTIVE STATE CONSTRAINTS

    , SIAM JOURNAL ON CONTROL AND OPTIMIZATION, Vol: 31, Pages: 677-697, ISSN: 0363-0129
  • Journal article
    FINNEY SJ, GREEN TC, WILLIAMS BW, 1993,

    REVIEW OF RESONANT LINK TOPOLOGIES FOR INVERTERS

    , IEE PROCEEDINGS-B ELECTRIC POWER APPLICATIONS, Vol: 140, Pages: 103-114, ISSN: 0143-7038
  • Journal article
    Mirkazemi-Moud M, Green TC, Williams BW, 1993,

    Analysis and Comparison of Real-Time Sine-Wave Generation for PWM Circuits

    , IEEE Transactions on Power Electronics, Vol: 8, Pages: 46-54, ISSN: 0885-8993

    The paper presents four methods for hardware and software generation in real time of sine waves suitable for PWM circuits. The sine waves are derived from a truncated modified cosine Taylor series, wt(π—wt) function, a digitally filtered trapezoid, and a second-order differential equation. Triplen injection is incorporated by the addition of a defined magnitude triangular waveform of three times the fundamental frequency. Each sine-wave generating technique is implemented, as applicable, in a programmable logic cell array and/or in microprocessor-based software. In each case, the output spectra and total harmonic distortion are compared with computer-simulated results. © 1993 IEEE
  • Journal article
    Finney SJ, Green TC, Williams BW, 1993,

    Spectral Characteristics of Resonant-Link Inverters

    , IEEE Transactions on Power Electronics, Vol: 8, Pages: 562-570, ISSN: 0885-8993

    Improvement in the frequency spectrum of resonant-link inverters does not match the increase in switching frequency because of the restriction of integral pulse modulation schemes such as delta modulation. Comparisons of low-frequency pulse width modulation with high-frequency delta modulation show that the spread spectrum of delta modulation may cause problems owing to low-frequency harmonics, despite a better total harmonic distortion. An assessment of total losses, for a bipolar junction transistor Darlington example, is used to set the operating frequency in each modulation case. © 1993 IEEE
  • Conference paper
    CASALINO G, PARISINI T, ZOPPOLI R, 1993,

    A NEURAL OPTIMAL CONTROLLER FOR A REAL-SPACE ROBOT

    , World Congress on Neural Networks (WCNN 93, Portland), Publisher: LAWRENCE ERLBAUM ASSOC PUBL, Pages: 208-211
  • Conference paper
    PYTLAK R, VINTER RB, 1993,

    A FEASIBLE DIRECTIONS TYPE ALGORITHM FOR OPTIMAL-CONTROL PROBLEMS WITH HARD STATE AND CONTROL CONSTRAINTS

    , 32nd IEEE Conference on Decision and Control, Publisher: I E E E, Pages: 3335-3340
  • Conference paper
    DEPINHO MDR, SARGENT RWH, VINTER RB, 1993,

    OPTIMAL-CONTROL OF NONLINEAR DAE SYSTEMS

    , 32nd IEEE Conference on Decision and Control, Publisher: I E E E, Pages: 3806-3807
  • Journal article
    PARISINI T, ZOPPOLI R, 1993,

    TEAM THEORY AND NEURAL NETWORKS FOR DYNAMIC ROUTING IN TRAFFIC AND COMMUNICATION-NETWORKS

    , INFORMATION AND DECISION TECHNOLOGIES, Vol: 19, Pages: 1-18, ISSN: 0923-0408
  • Conference paper
    ALESSANDRI A, PARISINI T, SANGUINETI M, ZOPPOLI Ret al., 1993,

    NEURAL NETWORKS FOR NONLINEAR FINITE-MEMORY STATE ESTIMATORS

    , World Congress on Neural Networks (WCNN 93, Portland), Publisher: LAWRENCE ERLBAUM ASSOC PUBL, Pages: 123-126

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