IEEE Transactions on Industrial Electronics

Volume 55, Number 11, Nov 2008 Access to the journal on IEEE XPLORE IE Transactions Home Page

55.11.1	"Table of Contents," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. C1-3805, Nov 2008. Abstract Link Full Text Abstract: Not Available
55.11.2	"IEEE Transactions on Industrial Electronics publication information," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. C2-C2, Nov 2008. Abstract Link Full Text Abstract: Not Available
55.11.3	A. Bartoszewicz, O. Kaynak, V. I. Utkin, "Guest Editorial," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3806-3808, Nov 2008. Abstract Link Full Text Abstract: Not Available Special Section Papers
55.11.4	B. Veselic, B. Perunicic-Drazenovic , C. Milosavljevic, "High-Performance Position Control of Induction Motor Using Discrete-Time Sliding-Mode Control," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3809-3817, Nov 2008. Abstract Link Full Text Abstract: A new way of induction-motor position control for high-performance applications is developed in this paper using discrete-time sliding-mode (DSM) control. In addition to the main DSM position controller, the proposed control structure includes an active disturbance estimator (ADE), in which a passive filter is replaced by another DSM-controlled subsystem, in order to improve system robustness and accuracy. Furthermore, the application of an ADE makes possible the design of both controllers using the knowledge of the nominal system only. Experiments have verified high efficiency of the proposed servo system under the influence of large parameter perturbations and external disturbances in the presence of unmodeled dynamics.
55.11.5	D. Traore, F. Plestan, A. Glumineau, J. de Leon, "Sensorless Induction Motor: High-Order Sliding-Mode Controller and Adaptive Interconnected Observer," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3818-3827, Nov 2008. Abstract Link Full Text Abstract: An adaptive interconnected observer and high-order sliding-mode control of induction motors without mechanical sensors (speed sensor and load torque sensor) are proposed and experimentally evaluated. The adaptive interconnected observer estimates fluxes, angular velocity, load torque, and stator resistance. Stability based on Lyapunov theory is proved to guarantee the “observer–controller” stability.
55.11.6	S. Ryvkin, R. Schmidt-Obermoeller, A. Steimel, "Sliding-Mode-Based Control for a Three-Level Inverter Drive," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3828-3835, Nov 2008. Abstract Link Full Text Abstract: The aim of this paper is to spread the sliding-mode control design technique on the new class of the ac drives: an induction motor fed by a three-level voltage-source inverter (3LVSI). A comprehensive investigation of possible drive “variable structures” was carried out. Based on this analysis, an original two-step design procedure allows the use of the “classical” result of sliding-mode theory for the real variable structure system with more than $2^{m}$ variable structures ( $m$ is the control space order). Based on this design procedure, the original control algorithm that includes a choice condition for 3LVSI input dc voltage and a switch table for the 3LVSI semiconductor switches are designed. The performance of the considered control structure has been examined by simulation.
55.11.7	M. Comanescu, L. Xu, T. D. Batzel, "Decoupled Current Control of Sensorless Induction-Motor Drives by Integral Sliding Mode," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3836-3845, Nov 2008. Abstract Link Full Text Abstract: This paper discusses the problems of current decoupling control and controller tuning associated with sensorless vector-controlled induction-motor (IM) drives. In field-oriented control, the $d$–$q$ synchronous-frame currents should be regulated to have independent dynamics such that the torque production of the IM resembles that of a separately excited dc motor. However, these currents are not naturally decoupled, and decoupling compensators should be used. Current loop tuning is an additional problem, since controller gains obtained by theoretical methods or simulation, quite often, do not work well on the real system. This paper proposes a new approach for current control that uses integral-sliding-mode (ISM) controllers to achieve decoupling. The synchronous-frame control voltages are synthesized as the sum of two controller outputs: a traditional one (PI) that acts on an ideal plant model and an ISM controller. The ISM controller decouples the $d$–$q$ currents and compensates the parameter variations in the current loops of the machine. Simulations and experimental tests on a 0.25-hp three-phase induction machine show satisfactory results.
55.11.8	A. Pisano, A. Davila, L. Fridman, E. Usai, "Cascade Control of PM DC Drives Via Second-Order Sliding-Mode Technique," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3846-3854, Nov 2008. Abstract Link Full Text Abstract: This paper presents a novel scheme for the speed/position control of permanent-magnet (PM) dc motor drives. A cascade-control scheme, based on multiple instances of a second-order sliding-mode-control (2-SMC) algorithm, is suggested, which provides accurate tracking performance under large uncertainty about the motor and load parameters. The overall control scheme is composed of three main blocks: 1) a 2-SMC-based velocity observer which uses only position measurements; 2) a 2-SMC-based velocity control loop that provides a reference command current; and 3) a 2-SMC-based current control loop generating the reference voltage. The proposed scheme has been implemented and tested experimentally on a commercial PM dc motor drive. The experimental results confirm the precise and robust performance and the ease of tuning and implementation, featured by the proposed scheme.
55.11.9	H. Aschemann, D. Schindele, "Sliding-Mode Control of a High-Speed Linear Axis Driven by Pneumatic Muscle Actuators," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3855-3864, Nov 2008. Abstract Link Full Text Abstract: This paper presents a cascaded sliding-mode (SM) control scheme for a new pneumatic linear axis which could be seen as alternative to an electric direct linear drive. Its guided carriage is driven by a nonlinear mechanism consisting of a rocker with an antagonistic pair of pneumatic muscle actuators arranged at both sides. This innovative drive concept allows for both an increased workspace of approximately 1 m as well as higher carriage velocities of approximately 1.3 m/s as compared to a direct actuation. Modeling of the muscle-driven positioning system leads to a system of four nonlinear differential equations including polynomial approximations of the volume characteristic as well as the force characteristic of the pneumatic muscles. The differential flatness of the system is exploited in combination with SM techniques to stabilize the error dynamics in view of unmodeled dynamics. The internal pressure of each pneumatic muscle is controlled by a fast underlying control loop. Hence, the control design for the outer control loop can be simplified by considering these controlled muscle pressures as ideal control inputs. The control design of the outer control loop involves a decoupling of rocker angle as well as mean internal pressure of both pneumatic muscles as flat outputs. Additionally, model uncertainties in the equation of motion like nonlinear friction are directly counteracted by an observer-based disturbance compensation which reduces the chattering problem. Experimental results show an excellent control performance that outperforms alternative control approaches in a comparison.
55.11.10	R. Ramos, D. Biel, E. Fossas, F. Guinjoan, "Interleaving Quasi-Sliding-Mode Control of Parallel-Connected Buck-Based Inverters," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3865-3873, Nov 2008. Abstract Link Full Text Abstract: An interleaving fixed-switching-frequency quasi-sliding control algorithm based on the zero average dynamics approach is reported and applied to the design of a modular system of parallel-connected single-phase inverters. This approach is used in a laboratory prototype of three inverters with field-programmable gate array control-based implementation embedding this algorithm, as well as a power management strategy for handling the number of active inverters. Experimental results are provided to illustrate the design features in terms of ac output voltage regulation, balanced current sharing among mismatched modules, interleaved fixed-switching-frequency operation and robustness with respect to load variations, and inverter activation during system operation.
55.11.11	Y. Shtessel, S. Baev, H. Biglari, "Unity Power Factor Control in Three-Phase AC/DC Boost Converter Using Sliding Modes," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3874-3882, Nov 2008. Abstract Link Full Text Abstract: A problem of power factor correction for a class of three-phase boost ac/dc power converters is addressed in this paper. A full-bridge hardware topology is studied and used to address the basics of the efficient power conversion with high values of power factor. The sliding mode control drives the output voltage to the desired dc level in the presence of external disturbances and internal parameter uncertainties while providing a value of power factor that is close to unity (greater than 97%). Sliding-mode observers are employed to estimate variation in load and phase resistances—subject of real-time adjustment in the control law. Multirate numerical simulation illustrates the efficiency of the proposed methodology and proves its ability to be implemented in digital form.
55.11.12	N. Yagiz, Y. Hacioglu, Y. Taskin, "Fuzzy Sliding-Mode Control of Active Suspensions," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3883-3890, Nov 2008. Abstract Link Full Text Abstract: In this paper, a robust fuzzy sliding-mode controller for active suspensions of a nonlinear half-car model is introduced. First, a nonchattering sliding-mode control is presented. Then, this control method is combined with a single-input–single-output fuzzy logic controller to improve its performance. The negative value of the ratio between the derivative of error and error is the input and the slope constant of the sliding surface of the nonchattering sliding-mode controller is the output of the fuzzy logic controller. Afterwards, a four-degree-of-freedom nonlinear half-car model, which allows wheel hops and includes a suspension system with nonlinear spring and piecewise linear damper with dry friction, is presented. The designed controllers are applied to this model in order to evaluate their performances. It has been shown that the designed controller does not cause any problem in suspension working limits. The robustness of the proposed controller is also investigated for different vehicle parameters. The results indicate the success of the proposed fuzzy sliding-mode controller.
55.11.13	Q. R. Butt, A. I. Bhatti, "Estimation of Gasoline-Engine Parameters Using Higher Order Sliding Mode," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3891-3898, Nov 2008. Abstract Link Full Text Abstract: Automotive-engine control and fault diagnostics largely depend upon the accuracy of the nonlinear models used. The structure of these nonlinear models is generally agreed upon. However, the model parameters are mostly difficult to obtain. This paper presents the development of second-order sliding-mode technique with real twisting algorithm for estimation of more than one parameter from a single dynamical equation of the nonlinear model. The system under study is a mean-value engine model of a naturally breathing gasoline engine. The parameters estimated are throttle body's discharge coefficient, load torque, and indicated torque as a function of inlet manifold pressure. The estimated variables are used to compensate for the unmodeled dynamics, modeling inaccuracies, and approximations which arise from the assumptions made for the development of mathematical model of a real-world system. The resulting model is a better description of the actual engine dynamics and gives good agreement to real engine data. The data are acquired from a production model vehicle equipped with an electronic control unit compliant to OBD-II standard. The observer designed is simple enough for implementation, and estimated parameters can also be used for engine-controller design and fault-diagnosis work.
55.11.14	Y. Pan, Ü. Ozguner, O. H. Dagci, "Variable-Structure Control of Electronic Throttle Valve," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3899-3907, Nov 2008. Abstract Link Full Text Abstract: In recent years, the use of electronic throttle valve systems has been very popular in the automotive industry. However, there exist difficulties in controlling the electronic throttle valve because of multiple nonsmooth nonlinearities including stick–slip friction, backlash, and a discontinuous nonlinear spring involved in the system. To alleviate the aforementioned difficulties in controlling the opening angle of a throttle plate and to realize a highly robust controller against uncertainties in the throttle body's mathematical model with limited cost, the variable structure concept is utilized after the employment of feedback backstepping techniques in the intermediate stages of design. Furthermore, the sliding mode observer design technique with equivalent control is exploited in order to estimate the values of necessary states that are not measured. The performance of the proposed controller is evaluated by performing some experiments on the throttle valve setup. First, small scale reference signals that pass through the nonsmooth nonlinearities are tracked even in different disturbed situations by the throttle valve plate, and then, the performance of the controller is tested for large-scale reference signals to observe the reaction time of the controller to sudden changes. For all the cases, the controller works rather well and meets the performance specifications.
55.11.15	M. Canale, L. Fagiano, A. Ferrara, C. Vecchio, "Vehicle Yaw Control via Second-Order Sliding-Mode Technique," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3908-3916, Nov 2008. Abstract Link Full Text Abstract: The problem of vehicle yaw control is addressed in this paper using an active differential and yaw rate feedback. A reference generator, designed to improve vehicle handling, provides the desired yaw rate value to be achieved by the closed loop controller. The latter is designed using the second-order sliding mode (SOSM) methodology to guarantee robust stability in front of disturbances and model uncertainties, which are typical of the automotive context. A feedforward control contribution is also employed to enhance the transient system response. The control derivative is constructed as a discontinuous signal, attaining an SOSM on a suitably selected sliding manifold. Thus, the actual control input results in being continuous, as it is needed in the considered context. Simulations performed using a realistic nonlinear model of the considered vehicle show the effectiveness of the proposed approach.
55.11.16	J.-X. Xu, K. Abidi, "Discrete-Time Output Integral Sliding-Mode Control for a Piezomotor-Driven Linear Motion Stage," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3917-3926, Nov 2008. Abstract Link Full Text Abstract: In this paper, a discrete-time output integral sliding-mode control (DOISMC) is developed for the precision control of a piezomotor-driven linear motion stage. A new integral-type sliding surface is first designed for arbitrary output reference tracking control. To estimate the unknown state and disturbance, two observers based on the integral-type sliding surface are designed. It is shown in this paper, through both theoretical analysis and experiments, that the discrete-time output integral sliding mode controller, together with the state and disturbance estimation, achieves an $O(T^{2})$ tracking precision w.r.t. the sampling period $T$. The superior performance of DOISMC achieved in the control of piezomotor-driven linear stage indicates that it is a suitable control method for precision control or servo applications.
55.11.17	R. Saeidpourazar, N. Jalili, "Microcantilever-Based Force Tracking With Applications to High-Resolution Imaging and Nanomanipulation," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3935-3943, Nov 2008. Abstract Link Full Text Abstract: This paper presents the development and implementation of a robust nonlinear control framework for piezoresistive nanomechanical-cantilever (NMC)-based force tracking with applications to high-resolution imaging and nanomanipulation. Among many nanoscale force sensing platforms, NMC is an attractive approach to measure and apply forces at this scale when compared with other previously reported configurations utilizing complicated MEMS devices or inconvenient-to-handle nanowires and nanotubes. More specifically, a piezoresistive layer is utilized here to measure nanoscale forces at the NMC's tip instead of bulky laser-based feedback that is commonly used in atomic force microscopy. Excluding the laser from the sensing loop offers a compact, inexpensive, and portable yet precise nanoscale force sensing platform. In order to track a predefined force trajectory at the NMC's tip, there is a need to model the piezoresistive NMC and design appropriate controller to move its base to provide the desired force. In previous publications of the authors, a new distributed-parameter modeling framework has been proposed to precisely predict the force acting on the microcantilever's tip. In contrast to this approach and in an effort to ease the follow-up controller development, the NMC-based force sensor is modeled here as a lumped-parameter system. However, replacing the NMC with a linear mass-spring-damper trio creates a variety of uncertainties and unmodeled dynamics that need to be addressed for a precise force sensor's readout. Moreover, the very slow response of NMC's piezoresistive layer to force variations at the NMC's tip makes the tracking problem even more challenging. For this, a modified robust controller, built around sliding mode control strategy and augmented with a perturbation estimation module, is proposed to overcome these roadblocks. Extensive numerical simulations and experimental results are presented to demonstrate the stability and performance - - characteristics of the designed controller. It is shown that utilizing the proposed controller instead of the commonly used proportional-integral-derivative controller can significantly enhance the controller's stability and performance characteristics and, ultimately, the imaging resolution and manipulation accuracy needed at this scale.
55.11.18	M. Defoort, T. Floquet, A. Kokosy, W. Perruquetti, "Sliding-Mode Formation Control for Cooperative Autonomous Mobile Robots," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3944-3953, Nov 2008. Abstract Link Full Text Abstract: This paper considers the control of a group of autonomous mobile robots. A coordinated control scheme based on a leader–follower approach is developed to achieve formation maneuvers. First and second order sliding-mode controllers are proposed for asymptotically stabilizing the vehicles to a time-varying desired formation. The latter controller, based on the relative motion states, eliminates the need for measurement or estimation of the leader velocity. It enables formation stabilization using a vision system carried by the followers and ensures the collision avoidance from the initial time instance. Experimental investigation has been conducted using a test bench made of three nonholonomic mobile robots in order to demonstrate the effectiveness of the proposed strategy.
55.11.19	D. Brambilla, L. M. Capisani, A. Ferrara, P. Pisu, "Fault Detection for Robot Manipulators via Second-Order Sliding Modes," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3954-3963, Nov 2008. Abstract Link Full Text Abstract: This paper presents a model-based fault detection (FD) and isolation scheme for rigid manipulators. A single fault acting on a specific actuator or on a specific sensor of the manipulator is detected (and, if possible, the exact location of the fault), and an estimation of the fault signal is performed. Input-signal estimator and output observers are considered in order to make the FD procedure possible. By using the suboptimal second-order sliding-mode (SOSM) algorithm to design the input laws of the observers, satisfactory stability properties of the observation error are established. The proposed algorithm is verified in simulation and experimentally on a COMAU SMART3-S2 robot manipulator.
55.11.20	Y.-W. Liang, S.-D. Xu, D.-C. Liaw, C.-C. Chen, "A Study of T–S Model-Based SMC Scheme With Application to Robot Control," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3964-3971, Nov 2008. Abstract Link Full Text Abstract: In light of the remarkable benefits and numerous applications of the Takagi–Sugeno (T–S) fuzzy system modeling method and the sliding mode control (SMC) technique, this paper aims to study the design of robust controllers for a set of second-order systems using a combination of these two approaches. The combined scheme is shown to have the merits of both approaches. It alleviates not only the online computational burden by using the T–S fuzzy system model to approximate the original nonlinear one (since most of the system parameters of the T–S model can be computed offline) but also preserves the advantages of rapid response and robustness characteristic of the classic SMC schemes. Moreover, the combined scheme does not need to online compute any nonlinear term of the original dynamics, and the increase in the number of fuzzy rules does not create extra online computational burdens for the scheme. The proposed analytical results are also applied to the control of a two-link robot manipulator and compared with the results using classic SMC design. Simulation results demonstrate the benefits of the proposed scheme.
55.11.21	M.-S. Park, D. Chwa, S.-K. Hong, "Antisway Tracking Control of Overhead Cranes With System Uncertainty and Actuator Nonlinearity Using an Adaptive Fuzzy Sliding-Mode Control," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3972-3984, Nov 2008. Abstract Link Full Text Abstract: An adaptive fuzzy sliding-mode control (AFSMC) is presented for the robust antisway trajectory tracking of overhead cranes subject to both system uncertainty and actuator nonlinearity. First, a fuzzy sliding-mode control (FSMC) law is designed for the antisway trajectory tracking of the nominal plant. In association with a conventional trajectory tracking control law, this FSMC law guarantees asymptotic stability as well as improved transient response of the load sway dynamics while the trolley tracking error dynamics is rendered uniformly asymptotically stable. Second, a fuzzy uncertainty observer is designed to cope with system uncertainty as well as actuator nonlinearity present in an actual plant, and it is incorporated with the FSMC law for the development of the AFSMC law. In addition to stability analysis, the robust performance of the proposed AFSMC law is verified via numerical simulations and experiments.
55.11.22	W. Chen, M. Saif, "Output Feedback Controller Design for a Class of MIMO Nonlinear Systems Using High-Order Sliding-Mode Differentiators With Application to a Laboratory 3-D Crane," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3985-3997, Nov 2008. Abstract Link Full Text Abstract: This paper addresses the problem of output feedback control design for a class of multi-input–multi-output (MIMO) nonlinear systems where the number of inputs is less than that of outputs. There are two difficulties in this design problem: 1) too few control inputs will not generally allow independent control over all outputs and 2) the state of the system is not available for measurements, and only the outputs are available through measurements. To address the first issue, a practical output feedback control problem is formulated, aiming to regulate only part of the outputs, and a controller structure with two design components in all or some chosen control inputs is proposed. To cope with the second difficulty, the recently developed high-order sliding mode differentiators (HOSMDs) are used to estimate the derivatives of the outputs needed in the controller design. With the derivatives estimated using HOSMDs, an output feedback controller is designed using the backstepping approach. Stability results are established for the designed controller under certain conditions. In order to test the applicability of the proposed output feedback controller in practical industrial problems, experiments are carried out though implementing the controller on a laboratory-scale 3-D crane. The experimental results are presented and reveal the advantage of the proposed controller structure, as well as the effect of controller gain and sampling periods.
55.11.23	R. Martinez, J. Alvarez, Y. Orlov, "Hybrid Sliding-Mode-Based Control of Underactuated Systems With Dry Friction," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 3998-4003, Nov 2008. Abstract Link Full Text Abstract: In this paper, hybrid control synthesis is proposed for a class of 2-degrees-of-freedom (DOF) underactuated mechanical systems with Coulomb friction in the joints. The control objective is to regulate both actuated and unactuated joints to desired positions. The proposed synthesis combines second-order sliding-mode (SOSM) control methods and a pure technical solution of imposing a relatively stronger dry friction on the unactuated joint as compared to that of the actuated joint. This design feature allows us to decouple the hybrid synthesis procedure into two steps. At the first step, a SOSM control algorithm is utilized to drive the unactuated link to the desired position in finite time. Once this task is achieved, the control input is switched to another SOSM algorithm which drives the actuated link to its desired position. As the amplitude of the controller used at the second step is smaller than the Coulomb friction level in the unactuated link, but it is greater than that in the actuated link, the unactuated link remains at rest, whereas the actuated link is regulated to the endpoint of interest. Performance issues of the developed synthesis, including robustness features of the closed-loop system, are illustrated in an experimental study made for a laboratory horizontal 2-DOF pendulum.
55.11.24	H. Ashrafiuon, K. R. Muske, L. C. McNinch, R. A. Soltan, "Sliding-Mode Tracking Control of Surface Vessels," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 4004-4012, Nov 2008. Abstract Link Full Text Abstract: A sliding-mode control law is presented and experimentally implemented for trajectory tracking of underactuated autonomous surface vessels. The control law is developed by introducing a first-order sliding surface in terms of surge tracking errors and a second-order surface in terms of lateral motion tracking errors. The resulting sliding-mode control law guarantees position tracking while the rotational motion remains bounded. The experimental vessel is a small boat with two propellers in an indoor pool. The position and orientation of the boat are measured using a camera that detects two infrared diodes attached near the front and back ends of the boat. A computer with a capture card processes the camera image to determine the position, calculates the control forces and their corresponding input voltages, and sends the control signals to wireless receivers on the vessel using a wireless transmitter. Several experiments are performed where the vessel accurately follows straight-line and circular trajectories.
55.11.25	P. Ignaciuk, A. Bartoszewicz, "Linear Quadratic Optimal Discrete-Time Sliding-Mode Controller for Connection-Oriented Communication Networks," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 4013-4021, Nov 2008. Abstract Link Full Text Abstract: In this paper, a new sliding-mode flow controller for connection-oriented communication networks is proposed. The networks are modeled as discrete-time $n$th-order systems. On the basis of the system state space description, a novel sliding-mode controller with a linear quadratic optimal switching plane is designed. Two control laws are proposed, each derived by minimizing different cost functionals. The first law is obtained when the whole state vector is considered in the optimization procedure, whereas in the latter case, the derivation concentrates on the system output variable with an additional weighting coefficient introduced into the cost functional. Closed-loop system stability is demonstrated, and the conditions for no data loss and full bottleneck link bandwidth utilization in the network are presented and strictly proved. According to the best of the authors' knowledge, this paper presents the first attempt to design a discrete-time sliding-mode flow control algorithm for connection-oriented communication networks.
55.11.26	S.-H. Yu, M.-H. Tseng, "Use of Sliding-Mode Modulation in Switch-Mode Power Amplification," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 4022-4028, Nov 2008. Abstract Link Full Text Abstract: This paper presents a recently developed feedback modulation scheme called sliding-mode modulation. Sliding-mode modulation, operating in sliding mode, simultaneously minimizes the accumulated quantization error and in-band modulation error while converting a continuous input signal into a coarsely quantized signal. With these minimization mechanisms, the modulator exhibits simple tractable behavior in the sliding mode and high in-band linearity in signal conversion. These two distinct properties make sliding-mode modulation an attractive substitute for other modulation schemes such as pulsewidth modulation and sigma–delta modulation. A simple method is presented for designing sliding-mode modulators. Moreover, a class-D audio power amplifier with three-level sliding-mode modulation is designed to demonstrate the practicality and superiority of this modulation technique.
55.11.27	X.-G. Yan, C. Edwards, "Adaptive Sliding-Mode-Observer-Based Fault Reconstruction for Nonlinear Systems With Parametric Uncertainties," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 4029-4036, Nov 2008. Abstract Link Full Text Abstract: In this paper, a class of nonlinear systems with uncertain parameters is considered. A novel adaptive law is designed to identify unknown parameters under the assumption that the time derivative of some of the outputs is measurable. Then, a sliding-mode observer is proposed to estimate the system state variables. By using the inherent features of sliding-mode observers, a fault-reconstruction scheme is proposed which can be implemented online. The proposed reconstruction signal can approximate the fault signal to any required accuracy even in the presence of uncertain parameters. A simulation example for a magnetic-levitation system is given to illustrate the feasibility and effectiveness of the proposed scheme.
55.11.28	J. P. V. S. Cunha, R. R. Costa, L. Hsu, "Design of First-Order Approximation Filters for Sliding-Mode Control of Uncertain Systems," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 4037-4046, Nov 2008. Abstract Link Full Text Abstract: The focus of this paper is on the synthesis of first-order filters which generate approximations for upper bounds of some signals needed in sliding mode control laws. The approximation is based on optimization methods which are applied to reduce the amplitude of the control signal. This paper also considers the application of these filters in output-feedback sliding mode controllers of linear systems in regular form with uncertain parameters and uncertain order. An experimental setup where the filters are applied to the model-reference control of an electromechanical system is presented to illustrate the design method.
55.11.29	H. H. Choi, "Sliding-Mode Output Feedback Control Design," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 4047-4054, Nov 2008. Abstract Link Full Text Abstract: We consider the sliding-mode output feedback controller (SMOFC) design problem for a class of uncertain multivariable systems. We first design a stabilizing SMOFC for matched uncertain systems. Using linear matrix inequalities (LMIs), we derive a necessary and sufficient condition for the existence of a linear sliding surface depending on outputs and compensator states. Using the solution of the LMI existence condition, we characterize the gain matrices. We give the nonlinear switching feedback gain guaranteeing the reachability condition. Second, we give an LMI-based design method to combine various useful performance criteria which can be used to guarantee a desired robust performance in spite of mismatched uncertainties. The performance criteria include $alpha$-stability, LQ performance, $H_{2}/H_{infty}$ performance, and peak-to-peak gain bound. In particular, we show that by including $H_{infty}$ performance constraints, we can easily solve the SMOFC design problem for challenging system models to which the previous methods are not easily applicable. Finally, we give a numerical design example showing that our method can be successfully applied to the problem of designing reduced-order SMOFCs for uncertain time-delay systems or mismatched uncertain systems.
55.11.30	B. Wang, X. Yu, X. Li, "ZOH Discretization Effect on Higher-Order Sliding-Mode Control Systems," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 4055-4064, Nov 2008. Abstract Link Full Text Abstract: In this paper, the zeroth-order-hold (ZOH) discretization of higher-order sliding-mode control (SMC) systems is studied. The equivalent control-based SMC systems with a relative degree higher than one are first formulated into a canonical form which is easy for control design. Theoretical results for the ZOH-discretized SMC systems with a relative degree higher than one are given, including estimates of the bounds of steady states and higher-order sliding-mode functions, as well as periodic properties of the trajectories. Simulation results of a vehicle suspension system are presented to show the effectiveness of the analysis and theoretical results.
55.11.31	J.-L. Chang, "Robust Discrete-Time Model Reference Sliding-Mode Controller Design With State and Disturbance Estimation," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 4065-4074, Nov 2008. Abstract Link Full Text Abstract: In response to a multi-input–multi-output discrete-time linear system with mismatched disturbance, an algorithm that is capable of performing estimated system state and disturbance is first proposed, followed by the design of the controller. Provided that the variation of disturbance in the two consecutive sampling instances is not significantly changed, both the system state and the disturbance can simultaneously be estimated by our proposed observer algorithm, with the estimation error being constrained in a small bounded region. Then, a method that utilizes a command generator tracker is designed to generate the reference model. The estimations of the system state and disturbance are then used in the sliding-mode controller, causing the tracking error to be constrained in a small bounded region with the guaranteed system stability. Finally, a numerical example is presented to demonstrate the applicability of the proposed control scheme. Signal Processing and Control
55.11.32	H. M. Ma, K. T. Ng, K. F. Man, "Multiobjective Coordinated Power Voltage Control Using Jumping Genes Paradigm," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 4075-4084, Nov 2008. Abstract Link Full Text Abstract: A new jumping genes paradigm in the format of hierarchical genetic algorithm is proposed for optimizing the power voltage control systems. The advantage of this scheme is its unique capacity for finding the required solutions that can be used for stabilizing the progressive voltage drop or even voltage collapse of a power system. Because of the multiobjective classification, all these solutions could therefore form a landscape of control pattern which is aptly applicable to the control purpose of the coordinated voltage control system. The application of the proposed paradigm is verified upon the New England 39-bus power system. A tradeoff between the recovery time and the quality of voltage control exists and largely depends upon the number of steps for control actions.
55.11.33	J. L. Mato, M. Pereira, J. J. Rodriguez-Andina, J. Farina, E. Soto, R. Perez, "Distortion Mitigation in RF Power Amplifiers Through FPGA-Based Amplitude and Phase Predistortion," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 4085-4093, Nov 2008. Abstract Link Full Text Abstract: Strong requirements are currently imposed to limit the negative effects of distortion or bad synchronization between emitter and receiver in digital communication channels. Distortion is mainly caused by the output stage of the emitter's power amplifier. It can be mitigated by applying to the input signals a correction, causing them a distortion contrary to that occurring in the amplifier (i.e., a predistortion). This paper presents a new method which combines amplitude and phase predistortion for digital video broadcasting—terrestrial (DVB-T) gap fillers (intermediate reemitters) in single frequency networks. These systems impose severe limitations to the time available for processing, which prevents the application of existing predistortion techniques. The method is based on a new high-frequency model of the output stage of the emitter's power amplifier, from which the design of an efficient amplitude and phase predistorter is straightforward. An advantageous tradeoff between complexity and processing time is achieved by applying predistortion at intermediate frequency. In addition, the proposed solution is independent of the frequency of the output radio frequency signals. A predistorter has been implemented in a field-programmable gate array and applied to a real gap filler. Experimental results which show the significant improvement achieved in the quality of real DVB-T signals, as well as the low complexity and low processing delay associated to the proposed approach, are presented.
55.11.34	M. S. Tavazoei, M. Haeri, S. Jafari, S. Bolouki, M. Siami, "Some Applications of Fractional Calculus in Suppression of Chaotic Oscillations," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 4094-4101, Nov 2008. Abstract Link Full Text Abstract: This paper presents two different stabilization methods based on the fractional-calculus theory. The first method is proposed via using the fractional differentiator, and the other is constructed based on using the fractional integrator. It has been shown that the proposed techniques can be used to suppress chaotic oscillations in 3-D chaotic systems. To show the practical capability of the methods, some experimental results on the control of chaos in chaotic circuits are presented.
55.11.35	"Have you visited lately? www.ieee.org," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 4102-4102, Nov 2008. Abstract Link Full Text Abstract: Not Available
55.11.36	"Access over 1 million articles-the IEEE Digital Library," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 4103-4103, Nov 2008. Abstract Link Full Text Abstract: Not Available
55.11.37	"Scitopia.org," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. 4104-4104, Nov 2008. Abstract Link Full Text Abstract: Not Available
55.11.38	"IEEE Industrial Electronics Society Information," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. C3-C3, Nov 2008. Abstract Link Full Text Abstract: Not Available
55.11.39	"IEEE Transactions on Industrial Electronics information for authors," IEEE Trans. on Industrial Electronics, vol. 55, no. 11, pp. C4-C4, Nov 2008. Abstract Link Full Text Abstract: Not Available