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Industrial Electronics, 2008. IECON 2008. 34th Annual Conference of IEEE

Date 10-13 Nov. 2008

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Displaying Results 1 - 25 of 624
  • [Front cover]

    Page(s): c1
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  • [Copyright notice]

    Page(s): 1
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  • Panel

    Page(s): 5
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  • Industrial electronics for renewable energy

    Page(s): 7 - 9
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  • Presentation of the vestas power program

    Page(s): 10 - 12
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  • One-cycle Controller for renewable energy conversion systems

    Page(s): 13 - 16
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  • Integrating energy storage with renewable energy systems

    Page(s): 17 - 18
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  • Renewable energy simulation

    Page(s): 19 - 22
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  • Networked, distributed energy resources

    Page(s): 23 - 24
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  • Recent advances and applications of power electronics and motor drives - Introduction and perspective

    Page(s): 25 - 27
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  • Recent advances and applications of power electronics and motor drives - Power semiconductor devices

    Page(s): 28 - 29
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  • Recent advances and applications of power electronics and motor drives - Power converters

    Page(s): 30 - 33
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  • Recent advances and applications of power electronics and Motor Drives - Electric machines and motor drives

    Page(s): 34 - 36
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  • Recent advances and applications of power electronics and motor drives - Advanced and intelligent control techniques

    Page(s): 37 - 39
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  • Control systems and applications

    Page(s): 41
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  • A comparison of fuzzy methods for modeling

    Page(s): 43 - 48
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (446 KB) |  | HTML iconHTML  

    The paper has the goal of comparing the performance of four different approaches to fuzzy modeling, using parameterized conjunctions, a novel concept named constrained fuzzy sets (CFSs), CFSs with parameterized conjunctions, and unnormalized interval type-2 Takagi Sugeno Kang (IT2 TSK). The theoretical and mathematical backgrounds of the four approaches are briefly described and their performances are compared in approximating a nonlinear function. View full abstract»

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  • A generic method for robust performance analysis of aircraft DC power systems

    Page(s): 49 - 54
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (316 KB) |  | HTML iconHTML  

    The recent evolution of aircraft power networks makes new design study necessary for solving key issues such as optimal efficiency, reliability, adaptability and performances. Indeed, DC power systems are subject to strong dynamic interactions between the source and the loads. In this paper, the need for a new design method of the power network is explained, and the authors propose to use a robust performance analysis method. The first main result concerns the analysis of the robustness of a classical aircraft DC source where the parameters of the DC bus are unknown. The second one shows the efficiency of the method to evaluate the potential gain in weight from a change in the performance specifications at the system level. View full abstract»

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  • A local search strategy for power system voltage control

    Page(s): 55 - 60
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (336 KB) |  | HTML iconHTML  

    A new local search technique based on control information searched by multiobjective optimization is developed for the bus voltage recovery of power systems. The order of priority that is assigned to the control devices and their movements are extracted from non-dominated solutions. On the basis of the optimized order of control devices, a new local search can then be applied to yield a feasible control solution. This is a very effective and practical way for coping voltage instability problems of large scale power systems. The proposed optimization scheme was implemented and verified by simulation of a realistic 6-bus power system. View full abstract»

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  • A study on universal serial bus latency in a real-time control system

    Page(s): 67 - 72
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    In real-time operation of a computer system, the programs for the processing of input data are constantly operational so that the results will be available within predetermined periods of time. Universal Serial Bus has become an industry standard for attaching peripheral devices to the computer. This paper presents an overview of USB, measures the latencies caused by USB and USB hub and compares their latencies to determine whether USB hub adds overhead to USB. Experimental evaluation shows that USB is a good interface for soft real-time systems that can tolerate delays in the order of few milliseconds. It also provides insight needed for building real-time architectures that depend on USB to collect sensor data. View full abstract»

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  • Adaptive search for peer-to-peer networks

    Page(s): 73 - 78
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (219 KB) |  | HTML iconHTML  

    Nowadays, the most popular peer-to-peer applications operate on unstructured networks. The obvious problems that have infected the popularity of peer-to-peer (P2P) systems are effective information search and traffic caused by the blind flooding-based search. In this paper, we have concentrated on developing an agent-based model for controlling query messages that are represented as agent; the ecologically inspired distributed search (EIDS), which derives its inspiration from natural ecosystem, is presented. We models autonomous adaptive agents after several ecological concepts and mechanisms. As an experiment result, we compare its performance against the well-known k-random walker approach. We focus on the problem of actively changing the topology of the P2P network by utilizing Schellingpsilas segregation model to improve the efficiency of search. View full abstract»

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  • Advanced control design for voltage scaling converters

    Page(s): 79 - 84
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (194 KB) |  | HTML iconHTML  

    In low-power electronics, achieving a high energy efficiency has great relevance. Nowadays, global asynchronous local synchronous systems enables to use a local dynamic voltage scaling architecture, this technique allows achieve a high energy efficiency. Moreover, local dynamic voltage scaling can be implemented using different approaches. One of them is Vdd-Hopping technique. In this paper, different controllers are designed for a Vdd-Hopping system implemented in a novel discrete converter in order to search for control strategies that present better performance in terms of dissipated energy reduction. It is shown here that some of the provided control strategies not only reduce the dissipated energy, but also improves the current transients are improved. View full abstract»

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  • An EKF-based observer for sensorless valve control in camless internal combustion engine

    Page(s): 85 - 90
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1812 KB) |  | HTML iconHTML  

    Camless internal combustion engines offer improvements over traditional engines in terms of torque performance reduction of emissions, reduction of pumping losses, fuel economy. Theoretically, electromagnetic valve actuators offer the highest potentials for improving efficiency due to their control flexibility. Sensorless control is one of the most important issues with regard to real implementation of this new technology. This paper proposes an observer based on an extended Kalman filter to realize a sensorless control. Current is measured while position as well as velocity of the electromagnetic valve are estimated. Real data from a valve actuator prototype are used to show the effectiveness of the proposed method. View full abstract»

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  • An improvement design of discrete-time indirect multivariable MRACS with structural estimation of interactor

    Page(s): 91 - 96
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (113 KB) |  | HTML iconHTML  

    In this paper, it will be proposed a design of indirect multivariable model reference adaptive control systems, which includes the on-line structural estimation of the interactor matrix. A newly developed derivation of the interactor will be used for the calculation. Simulation results which confirm the validity of the proposed method will be also presented. View full abstract»

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  • Application of internal model control to sensorless force control on surfaces

    Page(s): 97 - 102
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (321 KB) |  | HTML iconHTML  

    In this paper, we propose an internal model control (IMC) system applied for sensorless force control on surfaces. This method is expected to be used for surface-polishing, deburring and rubbing machines. The IMC based controller has properties of disturbance decoupling, tracking performance and disturbance estimation. The previous paper introduced an IMC scheme for sensorless force control. In this paper, we present an extended IMC system and discuss the stability of its closed-loop system. Also, we verify the effectiveness of this system through experiments. View full abstract»

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  • Attitude stabilization of small satellites using only magnetic actuation

    Page(s): 103 - 107
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (546 KB) |  | HTML iconHTML  

    Recently there has been a great deal of excitement over the emergence of new techniques for the attitude control of small satellites. In particular, the feasibility of nonlinear techniques for the attitude control of small satellites using only magnetic actuators is becoming a topic of increasing interest in the literature. Since magnetic control systems are relatively lightweight, require low power and are inexpensive, they are attractive for small, inexpensive satellites in low Earth orbits. Although the magnetic torques that can be applied to the spacecraft for attitude control purposes are constrained to lie in the plane orthogonal to the magnetic field vector, three-axis magnetic stabilization is still possible as the variability of the magnetic field along the considered orbit is sufficient to guarantee the stabilizability of the spacecraft. In this paper we present novel three-axis attitude control algorithms for small satellites using only magnetic torquers and investigate their performance through simulations. View full abstract»

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