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Industrial Electronics, 2000. ISIE 2000. Proceedings of the 2000 IEEE International Symposium on

Date 4-8 Dec. 2000

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  • The 2000 IEEE International Symposium On Industrial Electronics

    Publication Year: 2000 , Page(s): 0_2 - 0_22
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    Freely Available from IEEE
  • Author index

    Publication Year: 2000 , Page(s): 789 - 792
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    Freely Available from IEEE
  • Automation system for pipelines plan reconstruction

    Publication Year: 2000 , Page(s): 762 - 765 vol.2
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    This paper deals with the automation of oil pipelines inspection by means of a pig. The modern methods of pig location and navigation have been examined. The experience of aerospace technologies for construction of an inertial navigation system is used. The original methods of inertial system correction have been proposed. The block diagram of an algorithm for automated data processing of pipelines inspection and reconstruction of their plan is developed View full abstract»

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  • Fuzzy-genetic controller for a coupled drives system

    Publication Year: 2000 , Page(s): 741 - 746 vol.2
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    The problem of the interaction of MIMO systems has not yet been resolved completely under any methodology, due to its several inconveniences such as a deterioration in the rejection to disturbances, a considerable effort in the analysis when the model is complex, and because it is also necessary that the said model is lineal. The preferred system in this article is a laboratory prototype that emulates industrial processes that involve continuous material transfer, (just as in rolling mills, paper mills and wire manufacturing plants) whose linear model has several differences with the actual behavior of the system, due to nonlinear characteristics. For this reason it is not enough to use conventional techniques, and therefore a Takagi-Sugeno-type fuzzy control is implemented with rules which are optimized by a genetic algorithm. By means of this optimization, a considerable reduction of the interaction in the controlled part is carried out implicitly, thanks to the indirect consequences of the aptitude function construction proposed for the genetic algorithm View full abstract»

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  • Multicircuit approach for electrolytic cells, a novel method to force current balance in electrowinning plants

    Publication Year: 2000 , Page(s): 501 - 504 vol.2
    Cited by:  Papers (1)
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    The most used technology for obtaining pure copper in oxide ore copper mining is LIX-SX-EW (leaching-solvent extraction-electrowinning). In this process, the maximum allowable current which does not lead to electrode short-circuit sets the production limit. This is a major drawback if equipotential bars to connect the electrodes are used. This common practice exhibits a high dispersion value for the current distribution. This paper presents a connection arrangement of the electrowinning cells to balance cathode currents. The new connection drives the current through more balanced resistivity channels. Moreover, the uniform level of current achieved produces a more standardized product. Both, chemical and physical quality of cathodes is improved. Finally, the approach limits anode-cathode overcurrent preventing short circuit formation. Thus, current efficiency and plant operation are also improved View full abstract»

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  • A simple high speed sensorless method for PWM converter

    Publication Year: 2000 , Page(s): 419 - 424 vol.2
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    This paper describes about a simple construction of high speed source voltage sensorless method of a PWM converters. It has the following characteristics: (1) this sensorless method is realized only by adding two operational amplifiers for one phase and a one analog switch to a conventional PWM control circuit. Therefore, this method makes low cost and simple; and (2) by using a high speed PI circuit of source current control, a high speed response of a estimated source voltage is also obtained. It not only obtains excellent performances such as 99% power factor and 1.9% THD but also realizes small size, simple control construction and the low cost converter. It can be also applied to an active filter View full abstract»

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  • A multi-model parameter and state estimation of mechanical systems

    Publication Year: 2000 , Page(s): 700 - 705 vol.2
    Cited by:  Papers (1)
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    A parametric neural model and an identification learning algorithm for systems parameter and state estimation are described. For a complex nonlinear plants identification, a fuzzy-neural multi-model approach, is proposed. The proposed multi-model contains two parametric neural models, which are applied for real-time identification of a nonlinear mechanical system with friction. The simulation and experimental results confirms the multi-model applicability View full abstract»

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  • Device optimization and modeling for resonant power conversion

    Publication Year: 2000 , Page(s): 370 - 373 vol.2
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    Resonant conversion offers dramatic reduction in switching stress, enabling an increase in switching frequency until the device once again becomes the limiting factor. However, estimates on the performance of the device in resonant converters do not adequately account for device-circuit interactions that strongly influence the switching losses. Additionally, lack of satisfactory and reliable circuit models for soft-switching performance of power devices hinders the design of optimum soft-switching converters. For these reasons, it is vital to understand device performance in soft-switching applications using physical analysis and optimize it for highest switching frequency. This paper presents a study of the performance of IGBT in a resonant DC link inverter and series resonant inverter, and compares their performance against the voltage source inverter. Due to the contribution of switching losses, it is necessary to develop circuit models that can reliably predict device transient performance View full abstract»

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  • Improving settling time in a servo using a simple nonlinear PD controller

    Publication Year: 2000 , Page(s): 716 - 718 vol.2
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    A simple nonlinear PD controller is proposed to improve settling time in a DC servo. Experimental results shows that the proposed algorithm performs better than a linear PD. A simple tuning procedure is also proposed and a stability proof is given View full abstract»

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  • On-line estimation of instantaneous torque in switched reluctance machine control

    Publication Year: 2000 , Page(s): 385 - 389 vol.2
    Cited by:  Papers (11)
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    An inextensive and simple method to estimate the instantaneous torque of a switched reluctance machine online is developed and discussed in this paper. The presented technique is characterized by its simplicity and robustness in two ways. Only phase current and voltage are required as input variables. Therefore, shaft position-sensors can be avoided. Furthermore, the estimation algorithm can be realized in hardware, i.e. no processor is needed, the digital unit consists only of a simple memory device such as an EPROM. The estimation technique requires the machine characteristics. The method presented in this paper estimates torque as a function of flux linkage and phase current. With this real-time estimation and feedback of the instantaneous torque it is possible to control the torque with a hysteresis controller to obtain high performance drives. Furthermore, it is shown that the performance of the drive regarding torque-ripple can be significantly enhanced. The system is developed for the control of high performance drives as they are used in traction application. Experimental and simulation results are presented in this paper View full abstract»

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  • Harmonized and consistent data management in distributed automation systems: the NOAH approach

    Publication Year: 2000 , Page(s): 766 - 771 vol.2
    Cited by:  Papers (2)
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    This paper reports some results obtained by the authors within the Work Package 4 (WP4) of the ESPRIT project 26951-Network Oriented Application Harmonisation (NOAH). The main goal of the NOAH Project is to define concepts, models and tools as elements of an open platform for distributed automation systems as independent as possible of the available technologies. One of the points addressed in the NOAH Project is how to provide a common view of the system in such a way that any application, independent of its features, can be described by focusing on all the system composing elements including issues related to functional and physical distribution. The Data Base Repository (DBR) specification is the solution proposed to address this issue. It defines a common and general information model which provides a unified perspective for several activities including installation, configuration, maintenance and technical management, as well as a unified approach to the problem of describing complex distributed systems. In this work we deal with the specification of basic main operations to be carried out on the Database Repository. In particular, in the paper a description of data distribution in the NOAH model is given, and the Manager/Agent model, that is the basic interaction mode devised for data management, is introduced. Then data consistency issues in the NOAH DBR are outlined View full abstract»

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  • Comparison of two current modulation strategies for matrix converters under unbalanced input voltage conditions

    Publication Year: 2000 , Page(s): 465 - 470 vol.2
    Cited by:  Papers (1)
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    In this paper, the input current performance of matrix converters is analyzed, especially with reference to the operating conditions determined by unbalanced supply voltages. The space vector modulation technique is utilized to calculate the duty-cycles of the active voltage vectors that must be applied, in each switching cycle period, in order to satisfy the input and output requirements. A detailed theoretical analysis of the input current harmonic content under unbalanced input voltage conditions is presented for two different current modulation strategies. On the basis of numerical simulations as well as measurements on a laboratory prototype set-up, the strategies are compared and the validity of the theoretical investigation confirmed View full abstract»

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  • An Advanced Debugger for the 68HC16 family of microcontrollers as a powerful tool for the development of new products, testing and design

    Publication Year: 2000 , Page(s): 631 - 636 vol.2
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    The present article describes a specialized in-circuit debugging software named “Advanced Debugger” (DA for its initials in Spanish) for Motorola's 68HC16 family of microcontrollers. This Advanced Debugger is capable of editing and debugging programs, and also it can monitor and control the microcontroller operation via the background debugging mode (BDM). Debugging of programs with the DA is made with the use of BDM's set of commands and communication protocol, and through the handling of variables stored in memory locations, general-purpose registers, and internal registers. The DA permits total access at any time of the mentioned memory locations and registers, even the microcontroller's internal control registers. Some current debuggers do not access internal registers due to BDM's design limitations and programming complexity of the debugger. This Advanced Debugger is very powerful because it does not require the program to be recompiled every time it is needed to change the values of variables that access the internal registers and by consequence, the process does not have to be stopped to trace the error. Even more, the DA allows testing the microcontroller operation without the need of writing a single line of code. This paper is not intended to explain the design or programming of the Advanced Debugger, but to show its broad line of applications View full abstract»

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  • A simple and cast effective solution to reduce motor bearing currents in PWM inverter drives

    Publication Year: 2000 , Page(s): 425 - 429 vol.2
    Cited by:  Papers (5)
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    High frequency PWM inverters increase the circulation of motor bearing currents due to a high frequency flux induced by common mode currents, which link the stator, rotor and bearing loop. These circulating currents damage the motor bearings, increasing the overall maintenance costs. This paper analyzes the influence of motor design parameters in motor bearing currents amplitude and proposes different alternatives to eliminate them. Among the alternatives proposed in this paper, different types of shunt passive filters, and link reactors are analyzed, and also the influence of the resistance of the rotor bars are studied. Experimental results obtained in a laboratory prototype prove the viability of the theoretical analysis and the effectiveness of the proposed compensating alternatives View full abstract»

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  • General theory of multi-leg power conversion circuits based on neutral point voltage

    Publication Year: 2000 , Page(s): 471 - 476 vol.2
    Cited by:  Papers (2)
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    This paper describes the general theory of the main circuit constructions and control methods of legs based on output neutral point voltage control under multi-leg power conversion circuits. A controllable fluctuation range of the output neutral point voltage is obtained by the linear programming method under the condition of the desired symmetrical sinusoidal line output voltage. From the analysis, the following points are obtained: (1) the main circuits and control methods of the multi-leg power conversion circuits are constructed by simple theory based on output neutral point voltage control; (2) the controllable maximum line voltage of the each ideal main power circuits is obtained by calculating of the minimum controllable fluctuation range of the output neutral point voltage; and (3) the removed and the common leg conversion circuits can also be realized by simple neutral point voltage control, and high efficiency, low cost and small size converters are achieved. It is clear that this theory expands conventional schemes and it is simple and standard theory on the all multi-leg conversion circuits in the case of symmetrical sinusoidal line output voltage View full abstract»

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  • Robust H controller design for performance improvement of a semi-active suspension systems

    Publication Year: 2000 , Page(s): 706 - 709 vol.2
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    In this paper, a robust H controller for semi-active suspension system is proposed. For the improvement of ride quality the robust H controller is designed to satisfy robust stability and road disturbance attenuation using an H control design procedure. The performances of the designed controller for some road conditions are evaluated by computer simulation and finally these simulation results show the usefulness and applicability of the proposed robust H controller View full abstract»

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  • Disturbance and nonlinear Luenberger observers for estimating mechanical variables in permanent magnet synchronous motors under mechanical parameters uncertainties

    Publication Year: 2000 , Page(s): 407 - 412 vol.2
    Cited by:  Papers (1)
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    This paper deals with rotor position and speed estimation of permanent magnet synchronous motors (PMSMs). Two reduced order observers, a disturbance observer and a nonlinear one, are considered. It is shown that under exact model assumption, the nonlinear observer converges in exponential way, while a residual estimation error appears when a disturbance observer is used. Therefore, uncertainties in the mechanical submodel are taken into account. Estimation error arises due to the mismatch model; bounds for this error are calculated in both observers. Finally, a comparison of the observers performances is presented View full abstract»

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  • 13.56 MHz current-source generator based on third harmonic power transmission using immittance conversion topology and investigation on novel immittance conversion element

    Publication Year: 2000 , Page(s): 477 - 481 vol.2
    Cited by:  Papers (4)
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    A novel type of high frequency current-source inverter, operating in the megahertz-range, is presented in this paper. A special circuit, composed of a voltage-source half-bridge inverter, a distributed constant line and a parallel LC resonant circuit, has been developed for this purpose. A distributed constant line is connected between the output terminal of the inverter and the load. Here, since the length of the line is adjusted to 1/4 of the propagation wavelength λ (λ/4 condition), the output voltage of the voltage-source inverter can be converted to a current source on the load side. Furthermore, a 13.56 MHz current-source inverter based on the third harmonic power transmission method used with the previous system is developed. The experimental results from a prototype system verify the theoretical procedure. A minor problem, the excessive length of the distributed constant line, is pointed out. In order to overcome this, a novel immittance conversion element is proposed View full abstract»

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  • Model reference adaptive fuzzy controller for induction motor using auto-attentive approach

    Publication Year: 2000 , Page(s): 719 - 723 vol.2
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    This paper presents a model reference adaptive fuzzy speed controller for induction motor using the auto-attentive approach. It consists of developing an adaptive controller that can track the change of the operating point and the plant parameters even in magnetic saturation mode. The adaptive mechanism should be fast enough for all the tracking process. The proposed approach helps to increase the accuracy of the controller around the set point and keep the number of the roles in the rule-base as low as possible. This would minimize the computation complexity and enhance the system performance View full abstract»

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  • A generalised neural network for a humanoid hand

    Publication Year: 2000 , Page(s): 523 - 528 vol.2
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    The main contribution of this paper is a practical application of generalised neural networks for a dextrous hand moved by shape memory alloys (SMA). Since SMA have highly nonlinear characteristics and their parameters depend on the environment (mainly on temperature) so the robot hand is controlled by a generalised neural network, which can learn the actual nonlinear characteristics of the robot hand. The experimental setup consists of a 20 degree of freedom hand moved by SMA string used as artificial muscle. A video camera is used to detect the position of joints. The position is then sent to the visual display computer via the Internet, which displays the hand in 3D using OpenGl View full abstract»

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  • Operating region in active-front-end voltage/current source rectifiers

    Publication Year: 2000 , Page(s): 459 - 464 vol.2
    Cited by:  Papers (5)
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    Commercial active-front-rectifiers based upon three-phase voltage source topologies are capable of both supplying or absorbing reactive power from the electrical distribution system while serving as high DC power supplies. This is an important feature in industrial facilities where high power factor operation is of concern. This paper shows that the available range of reactive power in such topologies depends upon the actual active power being supplied by the topology to the load. Moreover, both the voltage and current source based topologies have limited and variable maximum reactive power compensation capabilities. In fact, both topologies are capable of providing maximum reactive power compensation when supplying 0.707 pu active power when operating passive loads in the rectifier mode. Extended analysis shows that during regeneration both topologies are also capable of supplying or absorbing limited amounts of reactive power from the electrical distribution system. Simulated and experimental results confirm the theoretical considerations View full abstract»

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  • An investigation of multiphase excitation nodes of a 10/8 switched reluctance motor with short flux path to maximize its average torque

    Publication Year: 2000 , Page(s): 390 - 395 vol.2
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    The switched reluctance motor (SRM) with short-flux path and multiphase excitation mode has become a good candidate for electric vehicle applications due to its higher torque to weight ratio. This paper describes an investigation of multiphase excitation modes of a five-phase 10/8 SRM with short-flux path in the case of more practical phase-current waveforms. For the purpose of maximizing the average electromagnetic torque of the SRM, the phase torque and instantaneous torque of the SRM are analyzed and simulated corresponding to typical excitation modes. From these simulations, an effective approach for average torque maximization at any given speed is proposed in terms of maximization of the average phase torque in one electrical cycle by choosing optimal turn-on and turn-off angles. Simulations illustrating this new approach are also included View full abstract»

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  • Neural networks for the control of soccer robots

    Publication Year: 2000 , Page(s): 571 - 575 vol.2
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    In 1995 robot soccer was introduced with the purpose to develop intelligent, cooperative multi-robot (agents) systems. Robot soccer provides a good opportunity to test control strategies and methods of multi-agent-systems. From the scientific viewpoint a soccer robot is an intelligent, autonomous agent which should carry out its task in cooperative, coordinated, and communicative way with other agents. The group behavior of agents and the behavior of a single agent should be explored. One of the single agent's behaviors is motion control. The desired velocity of each wheel is generated and sent to the robot comparing the desired and actual position of the robot. The mostly commonly used motion controller today is the digital PID-controller. In this paper as a “modern”, intelligent control algorithm, a neural network is introduced and tested View full abstract»

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  • A fuzzy based speed controller for soft switched DC to DC converter fed DC servomotor for aero space applications

    Publication Year: 2000 , Page(s): 730 - 734 vol.2
    Cited by:  Papers (3)
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    A new method of speed control of DC motors using pulse width modulation (PWM) based quasi-resonant (QR) zero voltage switching (ZVS) DC to DC converters is proposed. This control minimizes the switching losses, eliminates electromagnetic interference (EMI) and improves efficiency and commutation capability of the motor. The speed control is achieved by controlling the free wheeling period of the resonant inductor of a quasi-resonant converter (QRC). A half wave (HW) constant frequency (CF) ZVS converter exhibits a nonlinear relationship between its ON time and average output voltage. Hence, a fuzzy speed controller is designed to get better performance under load conditions. The software package PSPICE A/D is used for simulation View full abstract»

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  • Increasing the accuracy of differential global positioning system by means of use the Kalman filtering technique

    Publication Year: 2000 , Page(s): 637 - 642 vol.2
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    Differential GPS (DGPS) is the system used for improving accuracy in GPS position and velocity estimation. Measurements can be obtained in real time with a high level of accuracy. We present a modified Kalman filter for DGPS to enhance the estimation of the position and velocity. The realized algorithm in DGPS system can be implemented by low cost commercial C/A code GPS modules. The Kalman filter used reduces the anti-common errors between the users and reference station. Two variants of the filters have been investigated. The experimental testing of the performance of DGPS with Kalman filtering has been realized and discussed in the paper. The investigated procedures of Kalman filtering could be used for better positioning in the applications View full abstract»

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