By Topic

Control Applications, 1995., Proceedings of the 4th IEEE Conference on

Date 28-29 Sept. 1995

Filter Results

Displaying Results 1 - 25 of 211
  • Proceedings of the 4th IEEE Conference on Control Applications

    Publication Year: 1995, Page(s):0_3 - x
    Request permission for commercial reuse | PDF file iconPDF (1443 KB)
    Freely Available from IEEE
  • Name index

    Publication Year: 1995, Page(s):xi - xvi
    Request permission for commercial reuse | PDF file iconPDF (319 KB)
    Freely Available from IEEE
  • Analysis of stability robustness of a power system with loads represented by induction motors

    Publication Year: 1995, Page(s):818 - 824
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    Recent advances in robust control theory allow for the analysis of stability robustness of power system controls over a wide range of operating conditions. The primary objective of this paper is to apply the robustness procedure to a power system where the loads are represented by induction motors. Uncertainty in the induction motor model is attributed to variations in system conditions as well as... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Voltage oscillatory instability caused by induction motor loads

    Publication Year: 1995, Page(s):812 - 817
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    Isolated power systems which fit the structure of a single equivalent generator supplying an equivalent composite load can experience a voltage oscillatory instability entirely traceable to effects of induction motor loads interacting with automatic voltage regulators. This scenario is one where an AVR properly tuned for open circuit conditions is not necessarily well tuned for the on load conditi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A genetic algorithm-based approach to stochastic Var planning in power systems

    Publication Year: 1995, Page(s):810 - 811
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    This paper proposes a stochastic approach to power system Var planning with a genetic algorithm (GA). A stochastic voltage index obtained from the stochastic flow is defined to capture the behavior of nodal voltage variations for a given power system conditions. This paper optimizes the index with capacitor banks that may be expressed in integer. GA is used to obtain the better solutions from a st... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Complete controllability of a dynamic n-bus power system model

    Publication Year: 1995, Page(s):805 - 809
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    This research is concerned with the power system voltage controllability issue. A voltage controllability region is obtained for a dynamic, n-bus power system model. The complete controllability region helps to determine if the trajectories of a large, dynamic power system can be fully controlled with the available control devices View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adaptive position/force regulation of robots without rate information

    Publication Year: 1995, Page(s):711 - 716
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (716 KB)

    This paper considers the position/force regulation problem for rigid robots interacting with the environment for the case in which only joint position and contact force measurements are available, and proposes an adaptive controller as a solution to this problem. The proposed adaptive strategy is derived under the assumption that no information is available concerning the manipulator model or the ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Singularly perturbed method for the control design of a synchronous motor with its PWM inverter

    Publication Year: 1995, Page(s):799 - 804
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    This paper deals with the “optimal” PWM (pulse-width modulation) inverter control of a synchronous motor. Digital current control of a synchronous motor in the (α-β) representation is considered in order to take into account the rotating field during the sampling time. In this paper, one takes into account the PWM inverter in the current control scheme, using the two-time sc... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Hybrid adaptive control of two-link flexible manipulators grasping a payload

    Publication Year: 1995, Page(s):705 - 710
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    The hybrid adaptive control algorithms used for flexible manipulators are presented. The advantages of the hybrid adaptive control against the pure continuous-time adaptive control or discrete-time adaptive control are also discussed. From a practical standpoint, the infrequent adjustment of the control parameters makes for more robust adaptive control while from a theoretical point of view, the a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reduced-order flux observers with arbitrary convergence rate

    Publication Year: 1995, Page(s):793 - 798
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    This paper describes a method of designing reduced-order observers in the space-phasor flux description of the induction machine. By making use of the second-order complex model of the induction machine, two reduced-order observer structures with time-invariant feedback gains are derived and shown to possess arbitrary convergence rate. Experimental runs facilitate comparison of the suggested reduc... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reduction of torque pulsations by inductance harmonics identification of a permanent-magnet synchronous machine

    Publication Year: 1995, Page(s):787 - 792
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    It is usual, for controlling permanent-magnet synchronous machines, to assume the electromotive forces (emf), the self and mutual inductances variations sinusoidal with respect to the angular rotor position. This leads to sinusoidal fed currents. However, such an assumption is not valid in practice and leads to torque ripples. In this paper we propose a nonlinear current control strategy which red... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the application of neural networks modelling to a wet end chemical process in paper making

    Publication Year: 1995, Page(s):657 - 662
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    This paper presents a novel approach and its application to the modelling of non-linear unknown systems via B-spline neural networks. The system is assumed to be described by a NARMAX model, which is subjected to coloured noise. A new regression formula is constructed and it has been shown that the generalised RLS algorithm can be directly applied to train the weights and produce a desirable estim... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A backstepping based computed torque controller for switched reluctance motors driving inertial loads

    Publication Year: 1995, Page(s):779 - 786
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    An integrator backstepping technique is used to design a voltage level controller for switched reluctance (SR) motors driving inertial loads. The results cannot be inferred from similar approaches applied to other machines due to the SR motor's unique modeling and need for electronic commutation. An interesting feature of the proposed controller is the incorporation of a backstepping based “... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On-line evaluation of control loop performance

    Publication Year: 1995, Page(s):655 - 656
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    Industrial process control loops often suffer from poor control tuning or inaccurate devices. These will result in unnecessarily large output variance and oscillation. A new process control loop performance monitoring algorithm is developed based on a linear Laguerre model. It can detect if a process control loop is satisfactory, and if not, the cause for the bad performance. The algorithm has als... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Closed-loop system for control of combustor pattern factor

    Publication Year: 1995, Page(s):699 - 704
    Cited by:  Papers (2)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (764 KB)

    A neural network (NN) controller was developed to control the exit temperature distribution in a small-scale liquid fueled combustor. Simple feedforward NN structures were developed and trained off-line to simulate the closed-loop system and optimize the training algorithm. The adaptive NN controller was trained online and its ability to control under different operating scenarios was assessed. Va... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Estimation of vehicle speed fuzzy-estimation in comparison with Kalman-filtering

    Publication Year: 1995, Page(s):281 - 284
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    The aim of the system described is to measure the wheel slip with an accuracy of 1% without using expensive sensors. The multisensor data fusion is used with the integration of the commonly used antilock braking system wheel speed sensors. Two approaches are compared whereby the fuzzy approach is new and the Kalman approach is taken from the literature. Furthermore the possibility of estimating th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Hybrid step motor position estimation from back EMF

    Publication Year: 1995, Page(s):774 - 778
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    Hybrid stepping motors exhibit a back EMF voltage from which absolute position measurements may be extracted. This work analyses a novel technique for extracting these position measurements for constant velocity applications. The method produces accurate measurements (±0.1 mechanical degrees). To increase the utility of these measurements, Kalman filtering techniques have been employed. To ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A modified RBF network with application to system identification

    Publication Year: 1995, Page(s):649 - 654
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    Proposes a modified RBF network in which the regression weights are used to replace the constant weights in the output layer. It is shown that the modified RBF network can reduce the number of hidden units significantly. Moreover, the authors develop a computationally efficient algorithm, known as the EM algorithm, to estimate the parameters of the regression weights. A salient feature of this alg... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimization of airbag release algorithms using evolutionary strategies

    Publication Year: 1995, Page(s):275 - 280
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (636 KB)

    Increasing cost pressure for airbag systems brings up the need for automated design of release algorithms. Simple threshold release is not possible when using modern single point sensing, i.e. crash sensing in the passenger compartment. This paper presents a method for tuning airbag release algorithms using evolutionary strategies for optimization. A quality function for evaluating algorithm perfo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Weighting function selection for H based power system stabilizer design

    Publication Year: 1995, Page(s):1033 - 1034
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    Despite much progress in applying modern control technology to power system stabiliser (PSS) design with many different suggested PSS structures, many utilities still prefer a conventional PSS structure. The reasons may include ease of on-line tuning and lack of assurance on the stability related to some adaptive or variable structure schemes. Previously developed H and related d... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Preisach modeling of piezoceramic and shape memory alloy hysteresis

    Publication Year: 1995, Page(s):1086 - 1091
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    Smart materials such as piezoceramics and shape memory alloys (SMAs) exhibit significant hysteresis and in order to estimate the effect on open and closed loop control a suitable model is needed. One promising candidate is the Preisach independent domain hysteresis model that is characterized by the congruent minor loop and wiping out properties. Comparable minor loop and decaying oscillation test... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fuzzy-neuro based optimal control of variable reluctance motor

    Publication Year: 1995, Page(s):768 - 773
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    This paper presents the integration and synthesis of neural network and fuzzy logic to design an optimal controller with good robustness properties for the variable reluctance motor (VRM) drive system. The control scheme has two levels: first, applying the neural network for the selection of the optimal excitation parameters of the current profiles, which drive the system at required operating con... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Parameter estimation for evaluating ability of a rapid thermal processing system to maintain uniform temperature

    Publication Year: 1995, Page(s):643 - 648
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    An important issue in the design of a rapid thermal processing (RTP) system is the ability of the system to maintain a uniform temperature in a semiconductor wafer. This ability is a characteristics of the radiative heat transfer properties of the system which often cannot be predicted accurately without testing the system. This paper presents a method of experimentally determining if an RTP syste... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Space-vector PWM control of an induction motor drive

    Publication Year: 1995, Page(s):578 - 579
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    Many papers have been written on current-regulated (CRPWM) inverter control of induction motors by the space-vector approach. However, none of them have explicitly derived the exact relationship between the stator current tracking errors to be regulated and the voltages that the inverter must synthesize to regulate those errors. This note provides that derivation View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A comparative study of an optimal controller and a fuzzy logic controller for a multi-input multi-output system

    Publication Year: 1995, Page(s):269 - 274
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (676 KB)

    This paper deals with a comparison between the performance of a dynamic system when controlled according to a fuzzy logic control policy and when governed by an optimal controller incorporating integral action for disturbance rejection. The system under study has two inputs and two outputs. For design of an optimal controller, however, an integral action is added to the controller which leads to a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.