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Industrial Electronics, IEEE Transactions on

Issue 12 • Date Dec. 2011

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Displaying Results 1 - 25 of 26
  • Table of contents

    Page(s): C1 - 5285
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  • IEEE Transactions on Industrial Electronics publication information

    Page(s): C2
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  • Guest Editorial

    Page(s): 5286 - 5287
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  • Wavelength-Selective Shape Memory Alloy for Wireless Microactuation of a Bistable Curved Beam

    Page(s): 5288 - 5295
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (485 KB) |  | HTML iconHTML  

    Wireless and/or sensorless components offer a great potential for friendly integration in mechatronic systems. This paper presents a wireless technique to actuate a bistable curved beam using wavelength-selective shape-memory-alloy (SMA) thin foils. The SMA thin foil is irradiated remotely by continuous-mode laser diodes of 785 and 658 nm wavelengths. First, a comparison between two numerical thermal models is done. These models obey the same conduction and convection equations but the effect of phase transformation is integrated in two different ways. A good agreement is found between the two simulation results. Then, the force generated by the SMA sample (size: 3 mm × 1 mm × 0.1 mm), during martensite-to-austenite phase transformation, is experimentally measured using a miniature force sensor. The force comes out to be 403 mN with 70 mW laser power. Using this force value, a bistable curved beam is designed and fabricated by rapid prototyping technique. Optical filtering layers, which are responsible for the wavelength-selective response, are directly deposited onto the SMA samples. Finally, two SMA samples are used to switch the curved beam between its two stable positions. View full abstract»

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  • Locomotion System for a Mobile Robot on Magnetic Wheels With Both Axial and Circumferential Mobility and With Only an 8-mm Height for Generator Inspection With the Rotor Still Installed

    Page(s): 5296 - 5303
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1086 KB) |  | HTML iconHTML  

    This paper describes the locomotion system for a miniature climbing robot on magnetic wheels for inspecting large generator stators (>;1 m in diameter, >;10 MW, and installed in thermal power plants) with the rotor still installed. Due to its compact mechanical design, it is able to pass through narrow entrance gaps down to 9 mm. In comparison to previous designs, it is not only able to drive on axial paths on the stator but also switch to circumferential paths as well. This enhances the application scope to generators with internal obstacles and facilitates the future system integration toward fully autonomous scans. For the axial movement, the robot uses an adapted magnetic-wheeled drive unit from the previous generation. The circumferential paths are realized with inchworm locomotion (also called “frame walking”). This paper concludes with the test results and provides an outlook on future improvements and extensions toward a full robotic system. View full abstract»

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  • Normal-Force Control for an In-Pipe Robot According to the Inclination of Pipelines

    Page(s): 5304 - 5310
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1072 KB) |  | HTML iconHTML  

    To move freely, in-pipe robots must be able to adapt to the various geometric changes of pipes. Previously, we described an in-pipe robot that can adapt to changes in diameter and curvature of center curves. This robot is able to estimate the forces exerted on the inner surface of the pipes and balance its posture inside the pipe using angular sensors attached to its rotational joints. In this paper, a method is proposed to estimate the relative attitude between the robot's main body and the pipe using the angular sensors attached to a pantograph mechanism. The use of angular sensors makes the structure of the robot simpler and more effective than the use of force or vision sensors because the normal forces and attitude can be estimated from measured angle information. This geometric estimation of attitude relative to the pipes enables the robot to recognize the inclination of the pipes. The PAROYS-II robot can control its normal force according to the variation in pipe inclination. Thus, the proposed method could reduce power consumption and stress on the robot's parts. The algorithm has been validated by multiple experiments. View full abstract»

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  • Reconfigurable Control Architecture for Distributed Systems in the HERO Autonomous Helicopter

    Page(s): 5311 - 5318
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (985 KB) |  | HTML iconHTML  

    This paper presents the architecture of an onboard controller developed for the HERO autonomous helicopter, which is a low-cost unmanned aerial vehicle research platform. An embedded digital-signal-processor-based low-level controller is devoted to flight control, while a PC-based high-level controller is used for onboard perception tasks and interaction with other agents in a distributed system. The functional design, software architecture, and implementation of the low-level controller are analyzed in detail, focusing mainly on its runtime environment (JULIET) and its capability for flexible reconfiguration. The connectivity functions of the low-level controller with external possibly distributed agents are also addressed. Finally, the results of real autonomous flight experiments are presented, including the tracking of a smooth 3-D path described by over two hundred waypoints. View full abstract»

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  • Model-Based MIMO State-Space Control of a Car Vibration Test Rig With Four Electromagnetic Actuators for the Tracking of Road Measurements

    Page(s): 5319 - 5323
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (553 KB) |  | HTML iconHTML  

    A car vibration test rig with four electromagnetic actuators is presented. It excites a vehicle body for the simulation of road drives in squeak and rattle analyses. This novel application distinguishes itself by a very compact construction, few demands on peripherals, and high energetic efficiency. Its drawbacks are inherent actuator instability and distinct shaker-to-shaker couplings. These are considered in the design of a state-space system model of order 22. A multiple-input-multiple-output controller based on this model provides silent stabilization and high bandwidth. The vehicle under test remains sensorless during normal plant operation, as its states are estimated by a reduced observer. It is equipped with four or eight accelerometers only for the nonrecurring process of stimulus file generation. Road-measured reference trajectories are hereby replicated with iterative learning control methods. Experimental results prove that the plant is capable of a realistic excitation of the vehicle. View full abstract»

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  • Comparative Analysis of Discontinuous and Continuous PWM Techniques in VSI-Fed Five-Phase Induction Motor

    Page(s): 5324 - 5335
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2254 KB) |  | HTML iconHTML  

    This paper reports on flux harmonic distortion factor and current ripple analysis for various discontinuous pulse-width-modulation (PWM) techniques, which are applicable in conjunction with five-phase two-level inverter-fed induction motors. The analysis is based on the application of the complex space vector approach. The results are compared throughout with the corresponding continuous PWM techniques. Different space vector PWM and carrier-based PWM methods are encompassed by the analysis. This paper is supported by extensive simulation results. Verification of theoretical findings is provided through experimental measurements on a five-phase induction motor. View full abstract»

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  • A Novel Magnetizing-Curve Identification and Computer Storage Technique for Induction Machines Suitable for Online Application

    Page(s): 5336 - 5343
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (307 KB) |  | HTML iconHTML  

    Field orientation control of an induction machine often requires variable flux operation in either energy optimization mode or field-weakening mode above base speed. One way to generate accurate d-axis stator current reference at all operating points demands accurate knowledge about the magnetizing curve of the machine. This paper proposes a simple and accurate technique to identify the magnetizing curve, which assumes a synchronously rotating stator current axis as the d-axis. The proposed method can be implemented with the same hardware available for normal operation of the drive. The effect of parameter variation on the curve identification accuracy is also discussed. A “piecewise mixed model of approximation” is proposed to store the magnetizing curve in the processor memory for online application. The number of sections required by the proposed technique for accurate representation of the curve reduces drastically, compared to the widely used “piecewise linear model.” Different experiments performed on a practical machine validate the proposed concept. View full abstract»

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  • New Multilevel Converters With Coupled Inductors: Properties and Control

    Page(s): 5344 - 5351
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (794 KB) |  | HTML iconHTML  

    In the paper, a new five-level (5L) converter is presented. It is called 5L-active-neutral-point-clamped with coupled-inductor (5L-ANPC-CI) and consists of a three-level bidirectional (3L-B) commutation cell connected to two parallel basic commutation cells. The proposed topology can be seen as two cascaded current stages controlled at different frequencies. The high-current stage is specific to the 3L-B cell controlled at low-frequency, while the low-current stage corresponds to the parallel cells with coupled-inductor controlled at high-frequency (HF). Due to this advantage, the new converter appears as a useful solution to increase the output current, while the switched current through the HF power devices is reduced. The operation principle of the new structure is verified by simulations both for single- and for three-phase topologies. Experimental results for single-phase 5L-ANPC-CI converter on a low-voltage test bench are also provided to validate the proper operation of this concept. View full abstract»

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  • Position Estimation in Switched Reluctance Motor Drives Using the First Switching Harmonics Through Fourier Series

    Page(s): 5352 - 5360
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (630 KB) |  | HTML iconHTML  

    Position estimation using only active phase voltage and current is presented to perform high-accuracy position sensorless control of a switched reluctance motor (SRM) drive. By extracting the amplitude of the first switching harmonic terms of phase voltage and current for a pulsewidth modulation period through the Fourier series, flux linkage and position are estimated without external hardware circuitry, such as a modulator and a demodulator, resulting in increasing cost, as well as large position estimation error produced when the motional back electromotive force is ignored near zero speed. Hence, the proposed position estimation scheme covers the entire speed range, including the standstill under various loads, and it has high-resolution information depending on switching frequency. A two-phase SRM drive system, consisting of an asymmetrical converter and a conventional closed-loop proportional-integral current controller, is utilized to validate the performance of the proposed position estimation scheme in comprehensive operating conditions. The estimated values very closely track the actual values in dynamic simulations and experiments. It is shown that the proposed position estimation scheme using the Fourier series is sufficiently accurate and works satisfactorily at various operating points. View full abstract»

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  • Distributed Control for AC Motor Drive Inverters in Parallel Operation

    Page(s): 5361 - 5370
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (346 KB) |  | HTML iconHTML  

    A distributed control for pulsewidth modulation inverters in parallel operation to feed an asynchronous motor is proposed. The phase angle of the sinusoidal reference for each inverter is represented as a square signal and shared among the inverters and is pre-synchronized cycle-by-cycle with each other. And then the current sharing is regulated by introducing the circulating current into the mild adjustment of the sinusoidal references. All the sense and control for parallel operation are embedded in inverters distributed and a redundant power system is achieved. A prototype is built with experimental results given to verify the control proposed. View full abstract»

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  • Position Sensorless Control of PM Synchronous Motors Based on Zero-Sequence Carrier Injection

    Page(s): 5371 - 5379
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (932 KB) |  | HTML iconHTML  

    A position sensorless control method for PM synchronous motors is proposed in this paper. It relies on the magnetic saliencies to estimate the position of the rotor. In usual sensorless methods, a signal is injected in the αβ or dq components. In the proposed method, the signal is injected in the zero-sequence component. The high-frequency inherent zero-sequence component produced by a space-vector pulsewidth modulator (PWM) is used. In this way, no modification is required in the PWM, even at zero voltage, and the injected signal does not interact with the current controller. The response to the injected signal is obtained by a simple current derivative sensor. With this method, the position can be evaluated with high dynamics and with a high signal-to-noise ratio. The performance of the proposed method is evaluated with an experimental setup, using standard industrial servomotors with surface-mounted magnets. View full abstract»

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  • Design and Implementation of a Rectangular-Type Contactless Transformer

    Page(s): 5380 - 5384
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (797 KB) |  | HTML iconHTML  

    In this paper, a rectangular contactless transformer is proposed to be used in a contactless power supply system. The proposed rectangular contactless transformer maintains a high coupling coefficient even when it has a relatively large air gap. The characteristics of the proposed transformer are compared to a transformer using a general EE core with a variable air gap. The proposed system is verified through simulation and experimental results. The experimental results demonstrate that the efficiency of the contactless power transmission system using a contactless transformer based on a rectangular core is over 20% greater than the system based on the EE core. View full abstract»

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  • Modulation for Three-Phase Transformerless Z-Source Inverter to Reduce Leakage Currents in Photovoltaic Systems

    Page(s): 5385 - 5395
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1385 KB) |  | HTML iconHTML  

    In this paper, a modified Z-source inverter (ZSI) with specific modulation techniques is proposed to reduce leakage currents in three-phase transformerless photovoltaic (PV) systems. The new topology only requires an additional fast-recovery diode when compared with the original structure. On the other hand, the pulsewidth modulation technique is entirely modified in order to reduce the leakage currents through the conduction path. Simulation results for the three-phase transformerless PV system operating in two cases, i.e., connected to a grid and connected to a grounded RL load, are presented. Experimental results of leakage currents in three-phase ZSIs connected to a RL load are obtained to validate the theoretical and simulation models. View full abstract»

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  • Robust Static Output Feedback Control and Remote PID Design for Networked Motor Systems

    Page(s): 5396 - 5405
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (431 KB) |  | HTML iconHTML  

    In this paper, we investigate the problem of robust static output feedback (SOF) control for networked control systems (NCSs) subject to network-induced delays and missing data. The uncertain system matrices are assumed to lie in a convex polytope. The network-induced delays are time varying but within a given interval. The random data missing is characterized by the Bernoulli random binary distribution. Delay-dependent conditions for the exponential mean-square stability are first established in terms of matrix inequalities. Then, for the robust stabilization problem, the design of an SOF controller is presented by solving bilinear matrix inequalities (BMIs). In order to efficiently solve a nonconvex BMI, we propose an approach based on the linear matrix inequality technique. Furthermore, the developed approach is employed to design the remote proportional-integral-derivative (PID) controller for NCSs. The design of a digital PID controller is formulated as a synthesis problem of the SOF control via an augmentation method. Simulation examples illustrate the effectiveness of the proposed methods. View full abstract»

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  • Analysis of Pulse Bursting Phenomenon in Constant-On-Time-Controlled Buck Converter

    Page(s): 5406 - 5410
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (600 KB) |  | HTML iconHTML  

    In this paper, the effect of equivalent series resistance (ESR) of an output capacitor on the performance of a constant-on-time (COT)-controlled buck converter is studied, and a pulse bursting phenomenon is revealed. It indicates that the ESR of the output capacitor is one of the key factors causing pulse bursting phenomenon in COT-controlled buck converters, and the critical ESR is derived via time-domain analysis and stability analysis in the s-domain. It is pointed out that, when the ESR of the output capacitor is smaller than the critical ESR, pulse bursting phenomenon occurs; otherwise, it disappears. Simulation and experimental results are provided to verify the theoretical analysis results. View full abstract»

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  • Analysis and Design of a Current-Fed Resonant Inverter for Sinusoidal Excitation of Magnetic Components in the Megahertz Range

    Page(s): 5411 - 5423
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (493 KB) |  | HTML iconHTML  

    This paper deals with the theoretical analysis and construction of an inverter that is suitable as an excitation source for high-frequency measurements (up to 1.3 MHz) on magnetic components. Quantities as output current, operation frequency range, and harmonic content of the output voltage are discussed. The interaction between the power part and the control circuit is investigated by experimental verification of the theoretically extracted equations that describe the inverter's operation. As an application example, the proposed inverter is used for the implementation of ferrite core specific loss measurements in a frequency range not included in the data sheet and for the investigation of high-frequency insulation performance of enameled wires. View full abstract»

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  • Extended Virtual Spring Mesh (EVSM): The Distributed Self-Organizing Mobile Ad Hoc Network for Area Exploration

    Page(s): 5424 - 5437
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1199 KB) |  | HTML iconHTML  

    Mobile Ad hoc NETworks (MANETs) are distributed self-organizing networks that can change locations and configure themselves on the fly. This paper focuses on an algorithmic approach for the deployment of a MANET within an enclosed area, such as a building in a disaster scenario, which can provide a robust communication infrastructure for search and rescue operations. While a virtual spring mesh (VSM) algorithm provides scalable, self-organizing, and fault-tolerant capabilities required by a MANET, the VSM lacks the MANET's capabilities of deployment mechanisms for blanket coverage of an area and does not provide an obstacle avoidance mechanism. This paper presents a new technique, an extended VSM (EVSM) algorithm that provides the following novelties: 1) new control laws for exploration and expansion to provide blanket coverage, 2) virtual adaptive springs enabling the mesh to expand as necessary, 3) adapts to communications disturbances by varying the density and movement of mobile nodes, and 4) new metrics to assess the performance of the EVSM algorithm. Simulation results show that EVSM provides up to 16% more coverage and is 3.5 times faster than VSM in environments with eight obstacles. View full abstract»

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  • Advantages of Radial Basis Function Networks for Dynamic System Design

    Page(s): 5438 - 5450
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2624 KB) |  | HTML iconHTML  

    Radial basis function (RBF) networks have advantages of easy design, good generalization, strong tolerance to input noise, and online learning ability. The properties of RBF networks make it very suitable to design flexible control systems. This paper presents a review on different approaches of designing and training RBF networks. The recently developed algorithm is introduced for designing compact RBF networks and performing efficient training process. At last, several problems are applied to test the main properties of RBF networks, including their generalization ability, tolerance to input noise, and online learning ability. RBF networks are also compared with traditional neural networks and fuzzy inference systems. View full abstract»

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  • Quality without compromise [advertisement]

    Page(s): 5451
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  • Introducing ieee.tv [advertisement]

    Page(s): 5452
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  • 2011 Index IEEE Transactions on Industrial Electronics Vol. 58

    Page(s): 5453 - 5528
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  • IEEE Industrial Electronics Society Information

    Page(s): C3
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Aims & Scope

IEEE Transactions on Industrial Electronics encompasses the applications of electronics, controls and communications, instrumentation and computational intelligence for the enhancement of industrial and manufacturing systems and processes.

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Meet Our Editors

Editor-in-Chief
Carlo Cecati
DISIM - Univ. degli Studi dell'Aquila
67100 Aquila, Italy
c.cecati@ieee.org
Phone: +39 0862 434 450
Fax: +39 0862 1960 411