Search results for "Control and Systems Engineering"

showing 10 items of 994 documents

Li-ion Battery Modeling and State of Charge Estimation Method Including the Hysteresis Effect

2019

In this paper, a new approach to modeling the hysteresis phenomenon of the open circuit voltage (OCV) of lithium-ion batteries and estimating the battery state of charge (SoC) is presented. A characterization procedure is proposed to identify the battery model parameters, in particular, those related to the hysteresis phenomenon and the transition between charging and discharging conditions. A linearization method is used to obtain a suitable trade-off between the model accuracy and a low computational cost, in order to allow the implementation of SoC estimation on common hardware platforms. The proposed characterization procedure and the model effectiveness for SoC estimation are experime…

Battery (electricity)Energy storage systemsComputer Networks and CommunicationsComputer scienceEnergy storage system020209 energylcsh:TK7800-8360Battery modeling02 engineering and technologyEnergy storageControl theoryLinearizationSoC estimation0202 electrical engineering electronic engineering information engineeringCoulombElectrical and Electronic EngineeringOpen-circuit voltagelcsh:Electronics020208 electrical & electronic engineeringHysteresisTransducerState of chargeHardware and ArchitectureControl and Systems EngineeringHysteresis effectSignal ProcessingSettore ING-INF/07 - Misure Elettriche E ElettronicheElectronics
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Predicting the Batteries' State of Health in Wireless Sensor Networks Applications

2018

[EN] The lifetime of wireless sensor networks deployments depends strongly on the nodes battery state of health (SoH). It is important to detect promptly those motes whose batteries are affected and degraded by ageing, environmental conditions, failures, etc. There are several parameters that can provide significant information of the battery SoH, such as the number of charge/discharge cycles, the internal resistance, voltage, drained current, temperature, etc. The combination of these parameters can be used to generate analytical models capable of predicting the battery SoH. The generation of these models needs a previous process to collect dense data traces with sampled values of the batt…

Battery (electricity)EnergyState of healthComputer science020209 energyProcess (computing)Battery02 engineering and technologyInternal resistanceWireless sensor networksReliability engineeringState of health (SoH)TECNOLOGIA ELECTRONICAMicrocontrollerHardware_GENERALControl and Systems EngineeringModels0202 electrical engineering electronic engineering information engineeringComputerSystemsOrganization_SPECIAL-PURPOSEANDAPPLICATION-BASEDSYSTEMSElectrical and Electronic EngineeringMicrocontrollersWireless sensor networkVoltage
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An inductive charger for automotive applications

2016

The inductive charging represents a valid solution for the power transfer in automotive applications. Due to the Inductive Power Transfer (IPT), the wireless battery charging of Electric Vehicles (EVs) provides several benefits. In this paper, an inductive charger which is particularly suitable for electrical bicycles is proposed. A practical realization of the system has been carried out, and the system has been tested in terms of working and efficiency. Through a Phase Shift Modulation (PSM), a power regulation has been implemented. The target power is 100 W.

Battery (electricity)EngineeringWireless battery chargingbusiness.industry020209 energy020208 electrical & electronic engineeringAutomotive applicationElectrical engineeringAutomotive industryelectric vehicles; inductive power transfer; wireless battery charging; automotive applications02 engineering and technologyElectric vehicleSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciInductive chargingInductive power transferPower (physics)ModulationControl and Systems Engineering0202 electrical engineering electronic engineering information engineeringMaximum power transfer theoremWirelessElectrical and Electronic EngineeringbusinessRealization (systems)
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MODELLING USER UNCERTAINTY FOR DISCLOSURE RISK AND DATA UTILITY

2002

In this paper we show how a simple model that captures user uncertainty can be used to define suitable measures of disclosure risk and data utility. The model generalizes previous results of Duncan and Lambert.1 We present several examples to illustrate how the new measures can be used to implement existing optimality criteria for the choice of the best form of data release.

Bayes estimatorArtificial IntelligenceControl and Systems EngineeringComputer scienceSimple (abstract algebra)Data miningcomputer.software_genreInformation theoryData releasecomputerSoftwareInformation SystemsInternational Journal of Uncertainty, Fuzziness and Knowledge-Based Systems
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On Modern Matrix Iteration Processes of Bernoulli and Graeffe Type

1958

Bernoulli's principleArtificial IntelligenceHardware and ArchitectureControl and Systems EngineeringMatrix iterationCalculusApplied mathematicsType (model theory)SoftwareInformation SystemsMathematicsJournal of the ACM
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Ancillary Services in the Energy Blockchain for Microgrids

2019

The energy blockchain is a distributed Internet protocol for energy transactions between nodes of a power system. Recent applications of the energy blockchain in microgrids only consider the energy transactions between peers without considering the technical issues that can arise, especially when the system is islanded. One contribution of the paper is, thus, to depict a comprehensive framework of the technical and economic management of microgrids in the blockchain era, considering, for the first time, the provision of ancillary services and, in particular, of the voltage regulation service. When more PV nodes are operating in the grid, large reactive power flows may appear in the branches…

BlockchainComputer science020209 energyDistributed computingdis- tributed generation02 engineering and technologyIndustrial and Manufacturing EngineeringElectric power system0202 electrical engineering electronic engineering information engineeringRemunerationElectrical and Electronic Engineeringenergy blockchainGlow- worm Swarm Optimization.Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniP2PSettore ING-INF/03 - Telecomunicazioni020208 electrical & electronic engineeringTransactive energyAC powerGridSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaControl and Systems EngineeringOptimal reactive power flowMicrogridVoltage regulationDatabase transaction
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Back EMF Sensorless-Control Algorithm for High-Dynamic Performance PMSM

2010

In this paper, a low-time-consuming and low-cost sensorless-control algorithm for high-dynamic performance permanent-magnet synchronous motors, both surface and internal permanent-magnet mounted for position and speed estimation, is introduced, discussed, and experimentally validated. This control algorithm is based on the estimation of rotor speed and angular position starting from the back electromotive force space-vector determination without voltage sensors by using the reference voltages given by the current controllers instead of the actual ones. This choice obviously introduces some errors that must be vanished by means of a compensating function. The novelties of the proposed estima…

Brushless machines Control equipments Synchronous motor drives Transducers0209 industrial biotechnologyTest benchEngineeringEstimation theoryAngular displacementbusiness.industry020208 electrical & electronic engineeringControl engineering02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciCounter-electromotive force020901 industrial engineering & automationControl and Systems EngineeringControl theoryRobustness (computer science)0202 electrical engineering electronic engineering information engineeringInverterElectrical and Electronic EngineeringSynchronous motorbusinessMachine controlIEEE Transactions on Industrial Electronics
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Stability analysis of neutral systems with mixed time-varying delays and nonlinear perturbations

2009

In this paper, the problem of stability analysis for a class of neutral systems with mixed time-varying neutral, discrete and distributed delays and nonlinear perturbations are addressed. By introducing a novel Lyapunov-Krasovskii functional and combining the descriptor model transformation, the Leibniz-Newton formula, some free weighting matrices and a suitable change of variables, new sufficient conditions are established for the stability of the considered system, which are neutral-delay-dependent, discrete-delay-range-dependent and distributed-delay-dependent. The conditions are presented in terms of linear matrix inequalities (LMIs) and can be easily solved by existing convex optimizat…

Change of variablesControl theoryControl and Systems EngineeringModel transformationConvex optimizationNonlinear perturbationsLinear matrixNeutral systemsStability (probability)computerWeightingMathematicscomputer.programming_language
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An RF-Based Positioning Method for Tracing a Cluster of Moving Scatterers in Non-Stationary Indoor Environments

2021

Author's accepted manuscript © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. This letter presents a novel iterative positioning method for tracing the body segments of a person moving indoors using radio-frequency (RF) signals. The indoor space is equipped with a multiple-input multiple-output (MIMO) communication system. The person is modelled by a cluster of …

Channel transfer functionControl and Systems EngineeringComputer scienceAcousticsMIMOCluster (physics)Point (geometry)Radio frequencyElectrical and Electronic EngineeringTracingCommunications systemChannel modelsVDP::Teknologi: 500::Informasjons- og kommunikasjonsteknologi: 550IEEE Wireless Communications Letters
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Application of Genetic Algorithm on Parameter Optimization of Three Vehicle Crash Scenarios

2017

Abstract This paper focuses on the development of mathematical models for vehicle frontal crashes. The models under consideration are threefold: a vehicle into barrier, vehicle-occupant and vehicle to vehicle frontal crashes. The first model is represented as a simple spring-mass-damper and the second case consists of a double-spring-mass-damper system, whereby the front mass and the rear mass represent the vehicle chassis and the occupant, respectively. The third model consists of a collision of two vehicles represented by two masses moving in opposite directions. The springs and dampers in the models are nonlinear piecewise functions of displacements and velocities respectively. More spec…

ChassisComputer scienceModeling010103 numerical & computational mathematics02 engineering and technologyCollision01 natural sciencesCrash testfrontal crashvehicle-occupantDamperNonlinear system020303 mechanical engineering & transports0203 mechanical engineeringControl theoryControl and Systems EngineeringGenetic algorithmparameters estimationgenetic algorithm0101 mathematicsSimulationfrontal crash; genetic algorithm; Modeling; parameters estimation; vehicle-occupant; Control and Systems EngineeringMotor vehicle crash
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