Search results for "Control and Systems Engineering"

showing 10 items of 994 documents

Fuzzy sliding mode control design for a class of disturbed systems

2014

This paper discusses the problem of the fuzzy sliding mode control for a class of disturbed systems. First, a fuzzy auxiliary controller is constructed based on a feedback signal not only to estimate the unknown control term, but also participates in the sliding mode control due to the fuzzy rule employed. Then, we extend our theory into the cases, where some kind of system information can not be obtained, for better use of our theoretical results in real engineering. Finally, some typical numerical examples are included to demonstrate the effectiveness and advantage of the designed sliding mode controller. Refereed/Peer-reviewed

horizontal platform systemEngineeringFuzzy ruleComputer Networks and Communicationsbusiness.industryApplied MathematicsControl (management)SIGNAL (programming language)Mode (statistics)sliding mode controlControl engineeringFuzzy logicSliding mode controlTerm (time)Control and Systems EngineeringControl theorySignal ProcessingControl and Systems Engineering; Computer Networks and Communications; Applied Mathematics; Signal ProcessingbusinessJournal of the Franklin Institute
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Design and performance of the prototype Schwarzschild-Couder telescope camera

2022

Journal of astronomical telescopes, instruments, and systems 8(01), 014007-1 (2022). doi:10.1117/1.JATIS.8.1.014007

imaging atmospheric Cherenkov telescopesinstrumentationPhysics - Instrumentation and Detectorsvery-high-energy gamma-ray astronomyPhysics::Instrumentation and DetectorsMechanical EngineeringSettore FIS/01 - Fisica SperimentaleAstrophysics::Instrumentation and Methods for AstrophysicsFOS: Physical sciencesAstronomy and AstrophysicsInstrumentation and Detectors (physics.ins-det)530Electronic Optical and Magnetic MaterialsCherenkov telescope arraySpace and Planetary ScienceControl and Systems Engineeringddc:530prototype Schwarzschild-Couder telescopeAstrophysics - Instrumentation and Methods for AstrophysicsInstrumentation and Methods for Astrophysics (astro-ph.IM)silicon photomultipliers
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A Cognitive Architecture for Robotic Hand Posture Learning

2005

This paper deals with the design and implementation of a visual control of a robotic system composed of a dexterous hand and video camera. The aim of the proposed system is to reproduce the movements of a human hand in order to learn complex manipulation tasks or to interact with the user. A novel algorithm for robust and fast fingertips localization and tracking is presented. A suitable kinematic hand model is adopted to achieve a fast and acceptable solution to an inverse kinematics problem. The system is part of a cognitive architecture for posture learning that integrates the perceptions by a high-level representation of the scene and of the observed actions. The anthropomorphic robotic…

imitation learningInverse kinematicsgesture recognitionbusiness.industryMachine visionComputer scienceCognitive architectureKinematicsAnthropometryCognitive architectureHuman–robot interactionComputer Science ApplicationsHuman-Computer Interactionrobotic visionControl and Systems EngineeringGesture recognitionRobot handComputer visionArtificial intelligenceElectrical and Electronic Engineeringbusinesshuman-robot interfaceSoftwareInformation SystemsGesture
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Feedback Linearizing Control of Induction Motor Considering Magnetic Saturation Effects

2015

This paper presents an input-output feedback linearization (FL) control technique for rotating induction motors, which takes into consideration the magnetic saturation of the iron core. Starting from a new formulation of the dynamic model taking into consideration the magnetic saturation expressed in a space-state form in the rotor-flux-oriented reference frame, the corresponding FL technique has been developed. To this aim, a particular care has been given to the choice of nonlinear functions interpolating the magnetic parameters versus the rotor magnetizing current and the corresponding magnetic characteristic. The proposed FL technique has been tested experimentally on a suitably develop…

input-output feedback linearizationEngineering020209 energyInduction Motor input-output feedback linearization magnetic saturation effects.02 engineering and technologyIndustrial and Manufacturing Engineeringlaw.inventionSettore ING-INF/04 - AutomaticaControl theorylawmagnetic saturation effects0202 electrical engineering electronic engineering information engineeringTorqueFeedback linearizationInduction motor (IM)Electrical and Electronic Engineeringmagnetic saturation effects.MathematicsVector controlbusiness.industryRotor (electric)020208 electrical & electronic engineeringinput-output feedback linearization (FL)InductanceNonlinear systemMagnetic coreControl and Systems EngineeringbusinessInduction motorReference frame
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Distribution and generation of traps in SiO2/Al2O3 gate stacks

2007

In this work we combine charge-pumping measurements with positive constant voltage stress to investigate trap generation in SiO2/ Al2O3 n-MOSFET. Trap density has been scanned either in energy or in position based on charge-pumping (CP) measurements performed under different operating conditions in terms of amplitude and frequency of the gate pulse. Our results have revealed that the traps are meanly localized shallow in energy level, deeper in spatial position and they are mostly generated near the Si/SiO2 interface. (C) 2007 Elsevier Ltd. All rights reserved.

interface trapsWork (thermodynamics)Materials sciencecharge pumping (CP)Settore ING-INF/01 - ElettronicaTrap (computing)Stress (mechanics)Position (vector)Electrical and Electronic EngineeringSafety Risk Reliability and QualityBulk trapsbusiness.industryElectrical engineeringCondensed Matter PhysicsAtomic and Molecular Physics and OpticsSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsPulse (physics)AmplitudeDistribution (mathematics)Control and Systems Engineeringenergy distributionAtomic physicsbusinesshigh-k dielectricsEnergy (signal processing)
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Design and Realization of a Bidirectional Full Bridge Converter with Improved Modulation Strategies

2020

In this paper a Full-Bridge Converter (FBC) for bidirectional power transfer is presented. The proposed FBC is an isolated DC-DC bidirectional converter, connected to a double voltage source&mdash

isolated DC-DC bidirectional converterComputer Networks and CommunicationsComputer science020209 energylcsh:TK7800-836002 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici7. Clean energySettore ING-INF/01 - Elettronicafull-bridge converterlaw.inventionFull bridge converterlaw0202 electrical engineering electronic engineering information engineeringElectronic engineeringMaximum power transfer theoremElectrical and Electronic EngineeringTransformerfull-bridge converter; isolated DC-DC bidirectional converter; phase shift modulation; supercapacitorssupercapacitors020208 electrical & electronic engineeringlcsh:Electronicsphase shift modulationHardware and ArchitectureControl and Systems EngineeringSignal ProcessingVoltageElectronics
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Hidden attractors in Chua circuit: mathematical theory meets physical experiments

2022

AbstractAfter the discovery in early 1960s by E. Lorenz and Y. Ueda of the first example of a chaotic attractor in numerical simulation of a real physical process, a new scientific direction of analysis of chaotic behavior in dynamical systems arose. Despite the key role of this first discovery, later on a number of works have appeared supposing that chaotic attractors of the considered dynamical models are rather artificial, computer-induced objects, i.e., they are generated not due to the physical nature of the process, but only by errors arising from the application of approximate numerical methods and finite-precision computations. Further justification for the possibility of a real exi…

kaaosteoriaApplied MathematicsMechanical Engineeringelektroniset piiritAerospace EngineeringattraktoritOcean EngineeringChua circuitfysikaaliset ilmiöthidden attractorsradiophysical experimentControl and Systems Engineeringmatemaattiset mallitdynaamiset systeemitElectrical and Electronic EngineeringbifurcationsNonlinear Dynamics
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Chaos and its Degradation-Promoting-Based Control in an Antithetic Integral Feedback Circuit

2022

This letter deals with a novel variant of antithetic integral feedback controller (AIFC) motifs which can feature robust perfect adaptation, a pervasive (desired) ability in natural (synthetic) biomolecular circuits, when coupled with a wide class of process networks to be regulated. Using the separation of timescales in the proposed kind of AIFC, here we find a reducedorder controller that captures the governing slow part of the original solutions under suitable assumptions. Inspired by R(ossler systems, we then make use of such a simpler controller to show that the antithetic circuit can exhibit chaotic behaviors with strange attractors, where the bifurcation from a homeostatic state to c…

kaaosteoriaControl and OptimizationoscillatorsComputer sciencechaosControl (management)elektroniset piiritbiological system modelingprocess controloskillaattoritCHAOS (operating system)säätöteoriaControl and Systems EngineeringControl theoryintegrated circuit modelingmallit (mallintaminen)matemaattiset mallitmathematical modelsDegradation (telecommunications)degradation
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A2Ba: Adaptive Background Modelling for Visual Aerial Surveillance Conditions

2015

International audience; Background modelling algorithms are widely used to define a part of an image that most time remains stationary in a video. In surveillance tasks, this model helps to recognize those outlier objects in an area under monitoring. Set up a background model on mobile platforms (UAVs, intelligent cars, etc.) is a challenging task due camera motion when images are acquired. In this paper, we propose A2Ba, a robust method to support instabilities caused by aerial images fusing different information about image motion. We used frame difference as first approximation, then age of pixels is estimated. This latter gives us an invariability level of a pixel over time. Gradient di…

lcsh:Computer engineering. Computer hardwareComputer Networks and CommunicationsComputer sciencebusiness.industryComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONKDElcsh:TK7885-7895lcsh:TA168Computer Science Applicationsbackground modelling[SPI]Engineering Sciences [physics]Image processinglcsh:Systems engineeringControl and Systems Engineeringunmanned aerial vehicleComputer visionArtificial intelligenceGMMmoving objectsbusinessmobile observerSimulationInformation Systemsbackground subtraction
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Spatiotemporal hotspots analysis for exploring the evolution of diseases: An application to oto-laryngopharyngeal diseases

2013

Abstract View references (14) This paper presents a spatiotemporal analysis of hotspot areas based on the Extended Fuzzy C-Means method implemented in a geographic information system. This method has been adapted for detecting spatial areas with high concentrations of events and tested to study their temporal evolution. The data consist of georeferenced patterns corresponding to the residence of patients in the district of Naples (Italy) to whom a surgical intervention to the oto-laryngopharyngeal apparatus was carried out between the years 2008 and 2012

lcsh:Computer softwareGeographic information systemControl and OptimizationArticle Subjectbusiness.industrySpatiotemporal AnalysisComputational Mathematics Fuzzy C-Means disease analysis.disease analysisComputational Mathematicslcsh:QA76.75-76.765GeographyFuzzy C-MeansControl and Systems EngineeringGeoreferenceHotspot (geology)lcsh:Electrical engineering. Electronics. Nuclear engineeringbusinesslcsh:TK1-9971CartographyDemography
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