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IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society

Date 7-10 Nov. 2010

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Displaying Results 1 - 25 of 590
  • [Front matter]

    Page(s): 1 - 2
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    Freely Available from IEEE
  • Message from the organizing committees

    Page(s): 3 - 4
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    Freely Available from IEEE
  • Plenary sessions

    Page(s): 5 - 6
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    Freely Available from IEEE
  • Keynote speeches

    Page(s): 7 - 8
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    Provides an abstract for each of the keynote presentations and a brief professional biography of each presenter. The complete presentations were not made available for publication as part of the conference proceedings. View full abstract»

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  • Panel sessions

    Page(s): 9 - 10
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    Freely Available from IEEE
  • Introduction to IES panel discussion on Smart Grids

    Page(s): 11 - 14
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    Freely Available from IEEE
  • Control systems and applications

    Page(s): 15 - 16
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    Freely Available from IEEE
  • A discrete-time observer-based control for induction motors

    Page(s): 17 - 22
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (524 KB) |  | HTML iconHTML  

    The problem of controlling load perturbed induction motors is tackled by means of an observer based robust discrete-time control. In this scheme, model uncertainties and external disturbances are included in a general additive disturbance input which is to be on-line estimated and subsequently rejected via the controller actions. The observer carries out the disturbance estimation, thus reducing the complexity of the controller design. The controller efficiency is tested via some numerical simulations, performing a trajectory tracking task under severe load variations. View full abstract»

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  • A nuclear norm minimization approach to system identification with finite word-length data

    Page(s): 23 - 28
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (498 KB) |  | HTML iconHTML  

    This paper provides a nuclear norm minimization approach to an identification of linear systems with finite word-length data. Measurement data sampled from low resolution sensors are sequence of a few bit data and have large quantization errors, which deteriorate the identification accuracy. In this paper, the identification problem is formulated as a rank minimization problem, and the nuclear norm heuristic is introduced to estimate the model order and precise values of finite word-length data. An iterative algorithm is proposed based on the weighted nuclear norm minimization and its semidefinite programming formulation. Numerical examples demonstrate that we can estimate both the model order and parameters and show the effectiveness of the proposed method. View full abstract»

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  • A proposal for dual-rate controller design for unstable plants

    Page(s): 29 - 34
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    This paper discusses the algebraic design via Diophantine equations of dual-rate regulators generalizing the well-known interpolation constraints for the reference model in single-rate systems. The results are applicable to unstable plants. A simulation example on a robotic model is presented. View full abstract»

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  • A servo system control with time-varying load using type-2 fuzzy neural system

    Page(s): 35 - 40
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (604 KB) |  | HTML iconHTML  

    A type-2 fuzzy neural system (T2FNS) is proposed in this paper for process control. The structure of the system is presented and the rules for updating its parameters are derived using the gradient algorithm. The effectiveness of the proposed approach is evaluated on a laboratory setup that regulates the speed of a DC motor and the experimental results are compared with those obtained with the use of a type-1 fuzzy neural system (T1FNS). It is seen that T2FNS results in reduced oscillations around the set point in the presence of load disturbances. View full abstract»

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  • A system simulation technique combining SPICE and SIMULINK tools

    Page(s): 41 - 46
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (533 KB) |  | HTML iconHTML  

    This paper presents a system simulation technique that combines the capabilities of two defacto standard tools. The SPICE tool that accounts for electronic device characteristics is seamlessly incorporated with SIMULINK, which is a more general purpose dynamic system simulation environment. The result is a simulation technique that has the general flexibility of SIMULINK while accounting for electronic device level characteristics. The proposed technique also gives greater flexibility to the SPICE tool by simplifying the description of nonlinear circuit effects. The technique is demonstrated on a magnetic levitation system. The simultation results are in closer agreement to experimental data than the original SIMULINK model used on the project. View full abstract»

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  • Active structural control with input dead zone based on equivalent-input-disturbance approach

    Page(s): 47 - 52
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (393 KB) |  | HTML iconHTML  

    This paper presents an active control method that suppresses structural vibrations caused by wind and earthquakes. It is based on an equivalent-input-disturbance approach, which estimates a disturbance and produces an equivalent signal on the control input channel. We apply this approach by taking the vibrations to be a disturbance. This yields better vibration suppression performance than others. It can also compensate for unknown nonlinearities, such as a dead zone. A comparison of this method with LQR for a three-story building demonstrates the validity of the method. View full abstract»

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  • Adaptive robust stabilization for a class of uncertain nonlinear systems with external disturbances

    Page(s): 53 - 58
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (295 KB) |  | HTML iconHTML  

    The problem of adaptive robust stabilization is considered for a class of nonlinear systems with uncertainties which consist of uncertain system parameters and multiple external disturbances. It is supposed that the upper bounds of these uncertainties are unknown. In particular, different from the results reported in the control literature, in this paper the multiple external disturbances are assumed only to be any continuous and bounded functions, and the boundedness of their time derivatives is not required. Some improved adaptation laws with σ-modification are employed to estimate such unknown bounds. Then, by making use of the updated values of these unknown bounds, a class of continuous adaptive robust state feedback controllers is synthesized for such uncertain nonlinear systems. The standard adaptive backstepping design approach is properly modified to allow the use of our adaptive robust control technique. It is also shown that the resulting adaptive closed-loop control systems are uniformly bounded, and the states converge uniformly asymptotically to zero. Finally, a numerical example is given to demonstrate the validity of the results. View full abstract»

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  • An adaptive leader-follower formation controller for multiple AUVs in spatial motions

    Page(s): 59 - 64
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (495 KB) |  | HTML iconHTML  

    This paper considers the problem of leader-follower formation control for multiple Autonomous Underwater Vehicles (AUVs) in spatial motions. The objective is to derive a leader robot along a desired trajectory, and make the follower robots keep a desired formation with respect to the leader's configuration in 3-dimensional spaces. Unlike previous studies on formation control of multiple AUVs, hydrodynamic parameter uncertainties of the AUVs is incorporated into the formation control law. To deal with such uncertainties, an adaptive control rule mainly based on inverse dynamics of the plant is developed. A Lyaponov based close-loop stability analysis is also fully presented in the paper. In order to approve the capability of the proposed controller, some illustrative cases are considered. The results of the simulations are very promising. View full abstract»

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  • An experimental comparison of adaptive and robust control methods for precise positioning with tubular linear motors

    Page(s): 71 - 76
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (427 KB) |  | HTML iconHTML  

    Direct drives with linear motors are attracting the attention of both industry and academia thanks to their advantages in terms of higher precision, higher acceleration/deceleration, and reduced dimensions. This paper presents a comparison between industrial PID controllers and state-of-art non-linear control strategies for accurate position tracking on a linear permanent magnet synchronous motor. Namely, the comparison considers an advanced sliding mode approach with scheduling laws related to the state trajectory in the phase plane, and an approximation-based adaptive scheme that relies on a neural network to cancel the non-linearites of the system so as to have almost linear residual dynamics. The feasibility of the control strategies is validated by an extensive experimental analysis. The schemes are both theoretically stable and guarantee accurate positioning, which are, in terms of average absolute position error, two times better than standard PID. View full abstract»

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  • Analysis and design of full-bridge LC parallel resonant plasma driver with variable-inductor based phase control

    Page(s): 77 - 82
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (569 KB) |  | HTML iconHTML  

    This paper presents the analysis and design of the full-bridge (FB) LC parallel resonant plasma driver at the radio-frequency (RF) operation with variable-inductor based phase control scheme. Since the switching frequency of the RF plasma module is mainly fixed at 13.56MHz for EMC regulation, the variable-inductor control scheme can adjust the transconductance amplitude to enable load-current regulation. Additionally, in order to have minimal conduction loss on the switches, the design criterion of the required dead-time for ZVS condition with the minimal circulating current of the LC parallel resonant tank is required. Based on the equivalent circuit models of the RF plasma module described prior work, the analysis and design of the driver for the RF plasma module are presented. Finally, by using the SIMPLIS® simulation software, the FB LC parallel resonant plasma driver with the variable-inductor based phase control is simulated to validate the achievement of required functions. Furthermore, the dead-times and lagging phases are obtained from the simulation results, which are compared with the calculated results to validate the feasibility of design criterion. View full abstract»

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  • Analysis of digital controllers for equilibrated current distribution in an interleaved inverter

    Page(s): 83 - 90
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (431 KB) |  | HTML iconHTML  

    The control of the current distribution in a two leg interleaved inverter is analyzed in this paper. Feedback is used in order to control the current distribution on the inverter legs, avoiding the use of bulky and costly passive solutions. Low THD in the output voltage is ensured by a PI compensator and a repetitive controller. The design of the current compensators was accomplished by approximating the system to two SISO systems. It is shown that this method is feasible if the output voltage is decoupled by using output voltage decoupling. Good experimental results were achieved in a two leg 4kVA inverter operating at 7680Hz. They showed that the benefits of interleaving are not highly affected by using distinct modulator signals provided that the differences between the legs parameters are small. View full abstract»

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  • Ant colonies for Temporal Logic falsification of hybrid systems

    Page(s): 91 - 96
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (350 KB) |  | HTML iconHTML  

    The Extended Ant Colony Optimization (EACO) metaheuristic is applied to the problem of Metric Temporal Logic (MTL) falsification of nonautonomous hybrid systems. The goal of the MTL falsification problem is to detect operating conditions and input signals that will generate system trajectories that do not satisfy a user provided specification in MTL. A new method for parameterizing the input space using splines and Hermitian polynomials is introduced and the performance of the new algorithm is compared against Monte Carlo testing techniques. It is envisioned that this work will help practitioners in designing complex control or mixed-signal systems. View full abstract»

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  • Application of symmetrical proportional direction valve controlled unsymmetrical cylinder in the automatic roller gap adjusting of a novel straightener

    Page(s): 97 - 101
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (473 KB) |  | HTML iconHTML  

    This paper introduces the hydraulic control system of a novel tube straightener, in which the position of the rolls is controlled by the proportional valves controlled cylinders through a PLC in order to adjust the gap and compensate the deviation automatically. This hydraulic control system enables the straighter to have the characteristic of a high degree of automation and accuracy. This article focuses on the study of the symmetrical proportional direction valve controlled unsymmetrical cylinder since it is more difficult to be controlled than the symmetrical ones. In this article, firstly, the model of the symmetrical valve controlled unsymmetrical cylinder is built using DSHplus and the effectiveness is tested by referring to the practical measured value. Then, the characteristic of the model is discussed further by comparing with the model of the symmetrical valve controlled symmetrical cylinder. Finally, two common used compensation methods that are applied to the symmetrical valve controlled unsymmetrical cylinder system are analyzed separately and their effectiveness is compared. This is meaningful for hydraulic designers to select the proper compensation ways in the design. View full abstract»

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  • Cooperative filters: Localization and injected current control

    Page(s): 102 - 107
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (392 KB) |  | HTML iconHTML  

    The present work discuss the localization and coordinated operation of active power filters installed in a distribution power network. The localization problem is solved off-line for a given load variation scenario. The control of the current injected by the active power filter is solved on-line. In both cases the design solutions aim at reducing the total harmonic distortion below 5% and individual harmonic distortion below 3% to satisfy the IEEE-519 standard. View full abstract»

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  • Driver distraction detection for vehicular monitoring

    Page(s): 108 - 113
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (701 KB) |  | HTML iconHTML  

    This paper describes a driver distraction detection scenario which is important to enhance driving safety. We employ data obtained by a GPS to reproduce the driver behavior. Gaussian Mixture model (GMM) is used to capture the sequence of driving characteristics according to the reconstructed vehicle's information and it is also used as a classifier to assign the driving behavior to normal or distraction category. In our work, we consider using a low cost 1Hz GPS receiver as the vehicle data acquisition equipment instead of the costly sensors (steering angle sensor, throttle/brake position sensor, etc). The nonlinear extended 2-wheel vehicle dynamic model is adopted in this study. Firstly, two states, i.e. the sideslip angle and the yaw rate are calculated since they are not available from GPS measurements. Secondly, a piecewise optimization scheme is proposed to reconstruct the driving behaviors which include the steering angle and the longitude force. Finally, a GMM classifier is applied to identify whether the driver is under distraction. View full abstract»

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  • Experimental setup for inductive efficiency measurements of domestic induction systems based on energy balance

    Page(s): 114 - 119
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1194 KB) |  | HTML iconHTML  

    In an induction heating system the energy delivered into the work piece for heating purposes with respect to the self-heating of the windings is quantified by means of the induction efficiency. This parameter can be measured by using an energy balance, for example the ratio between the boiled water weight and the electrical energy supplied into the windings considering a period of time. In this paper an experimental setup for measurements of the induction efficiency in domestic systems is presented. In order to reduce errors in the electrical power measurements, which involve voltage and current signals at frequencies up to 100 kHz with harmonics, a method using differential measurements of the boiled water weight is proposed. Experimental results of the induction efficiency of a commercial induction system operated in real conditions are presented. View full abstract»

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  • Flatness based speed control of drive systems with resonant loads

    Page(s): 120 - 125
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    The design and analysis of a flatness based speed control method for drive systems with elastically coupled loads is presented. Drive systems with elastically coupled loads tend to mechanical vibrations due to a finite stiffness of the drive shafts material. These unwanted vibrations stress the system and can reduce its lifetime. The way out and aim of this analysis is a high performance speed control of drive systems with resonant loads with damping of mechanical oscillations. Conventional control methods like proportional-integral based controllers are not able to damp these oscillations effectively. Model based control methods are more appropriate to handle this problem. Therefore, the rather new model based control concept based on differential flatness is applied to the considered system. High dynamic and suppression of mechanical oscillations can be achieved with flatness based control without the reduction of the disturbance reaction. Furthermore, only measurement of the motor speed is required. Simulation and measurement results confirm these statements. The results are compared to conventional PI-control. View full abstract»

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  • FPGA-based digital voltage-current controller for a buck converter

    Page(s): 126 - 131
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (675 KB) |  | HTML iconHTML  

    This paper introduces an analysis and design of a digital controlled double loop voltage-current for a buck converter. Taking into account the implementation requirements, the chosen platform was an Field-Programmable Gate Array (FPGA). This paper also shows in detail the analog-digital interface. The study is completed by a detailed analysis of the FPGA programming including states machines and logic diagrams. Finally, theoretical results are validated with extensive simulations. View full abstract»

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