Search results for "OUTPUT"

showing 10 items of 381 documents

Alanine/ESR dosimetry for electron Intra-Operative RadioTherapy: output factor measurements and Monte Carlo-GEANT4 simulations for IORT mobile dedica…

2015

Intra-operative radiation therapy (IORT) is a treatment modality where a single high dose of radiation is delivered directly to the tumor bed or to the exposed tumor during the surgical intervention, while avoiding surrounding dose-limiting structures. Mobile electron linear accelerators dedicated to IORT have been manufactured which have promoted a local large diffusion of this radiotherapy modality. For breast irradiation, a single fraction of 21 Gy delivered on the target volume during the surgical procedure is equivalent to the total dosage (60 Gy) usually delivered during 30 external fractionated radiotherapy at 2Gy/fraction. Alternatively, a single dose of 10 Gy can be administered as…

Output FactorsIORTSettore FIS/01 - Fisica SperimentaleSettore MED/36 - Diagnostica Per Immagini E RadioterapiaGEANT4Settore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)IEORTESR
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Corrigendum to “Observer-Based Sliding Mode Control for Stabilization of a Dynamic System with Delayed Output Feedback”

2016

Output feedback0209 industrial biotechnologyComputer scienceGeneral Mathematicslcsh:MathematicsGeneral Engineering02 engineering and technologylcsh:QA1-939Sliding mode control020901 industrial engineering & automationControl theorylcsh:TA1-20400202 electrical engineering electronic engineering information engineering020201 artificial intelligence & image processingObserver basedlcsh:Engineering (General). Civil engineering (General)Mathematical Problems in Engineering
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Static output-feedback control under information structure constraints

2013

An important challenge in the static output-feedback control context is to provide an isolated gain matrix possessing a zero-nonzero structure, mainly in problems presenting information structure constraints. Although some previous works have contributed some relevant results to this issue, a fully satisfactory solution has not yet been achieved up to now. In this note, by using a Linear Matrix Inequality approach and based on previous results given in the literature, we present an e cient methodology which permits to obtain an isolated static output-feedback gain matrix having, simultaneously, a zero-nonzero structure imposed a priori. Peer Reviewed

Output feedbackAutomatic controlLMIs:Informàtica::Automàtica i control [Àrees temàtiques de la UPC]:Matemàtiques i estadística::Anàlisi numèrica::Mètodes numèrics [Àrees temàtiques de la UPC]:15 Linear and multilinear algebra; matrix theory [Classificació AMS]Information structureControl (management):15 Linear and multilinear algebra [Classificació AMS]Structure (category theory)Linear matrix inequalityContext (language use)Information structure constraintsOutput-feedback controlMatrius (Matemàtica)Control automàticMatrix (mathematics)Control and Systems EngineeringControl theoryInformation structure constraints; LMIs; Output-feedback controlmatrix theoryA priori and a posterioriElectrical and Electronic EngineeringMatrix inequalitiesMathematics
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Design of Robust Active Load-Dependent Vehicular Suspension Controller via Static Output Feedback

2013

Output feedbackControl theoryComputer scienceControl engineeringSuspension (vehicle)Active loadSAE Technical Paper Series
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Robust Output-Feedback Based Fault-Tolerant Control of Active Suspension with Finite-Frequency Constraint ★ ★This work is partly supported by Nationa…

2015

Abstract In this paper, the H∞ fault-tolerant control (FTC) problem of active suspensions with finite-frequency constraints is investigated. A full-car model is employed in the controller design such that the heave, pitch and roll motions can be simultaneously controlled. Both the actuator faults and external disturbance are considered in the controller design. As the human body is more sensitive to the vertical vibration in 4-8Hz, robust H∞ control with finite frequency constraints is designed. From the practical perspective, a robust dynamic output-feedback controller with fault tolerant ability is proposed, while other performances such as suspension deflection and actuator saturation ar…

Output feedbackController designEngineeringbusiness.industryVertical vibrationFault toleranceControl engineeringActive suspensionActuator saturationControl and Systems EngineeringControl theoryDeflection (engineering)businessActuatorIFAC-PapersOnLine
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Recent Advances in Static Output-Feedback Controller Design with Applications to Vibration Control of Large Structures

2014

Published version of an article in the journal: Modeling, Identification and Control. Also available from the publisher at: http://dx.doi.org/10.4173/mic.2014.3.4 Open Access In this paper, we present a novel two-step strategy for static output-feedback controller design. In the first step, an optimal state-feedback controller is obtained by means of a linear matrix inequality (LMI) formulation. In the second step, a transformation of the LMI variables is used to derive a suitable LMI formulation for the static output-feedback controller. This design strategy can be applied to a wide range of practical problems, including vibration control of large structures, control of oshore wind turbine…

Output feedbackEngineeringDecentralized control:Informàtica::Automàtica i control [Àrees temàtiques de la UPC]Static output-feedbackStructural Vibration ControlControl (management)Vibration control:Enginyeria civil::Materials i estructures [Àrees temàtiques de la UPC]Feedback control systemsMatrius (Matemàtica)VDP::Mathematics and natural science: 400::Mathematics: 410::Analysis: 411lcsh:QA75.5-76.95Structural vibration controlControl d'estructures (Enginyeria):93 Systems Theory; Control [Classificació AMS]Decentralized Control; Static Output-feedback; Structural Vibration Control; Control and Systems Engineering; Software; Modeling and Simulation; Computer Science Applications1707 Computer Vision and Pattern RecognitionComputer Science::Systems and ControlControl theoryControlMatrix inequalitiesController design:93 Systems Theory [Classificació AMS]business.industryComputer Science Applications1707 Computer Vision and Pattern RecognitionControl engineeringDecentralized ControlDecentralised systemComputer Science ApplicationsIdentification (information)Control and Systems EngineeringModeling and SimulationSistemes de control per retroaccióStatic Output-feedbacklcsh:Electronic computers. Computer scienceStructural control (Engineering)businessSoftwareModeling, Identification and Control: A Norwegian Research Bulletin
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Static output-feedback controller design for vehicle suspensions: an effective two-step computational approach

2014

In this study, a novel two-step methodology is applied in designing static output-feedback controllers for a class of vehicle suspension systems. Following this approach, an effective synthesis of static output-feedback controllers can be carried out by solving two consecutive linear matrix inequality optimisation problems. To illustrate the main features of the proposed design strategy, two different static output-feedback H 8 controllers are designed for a quarter-car suspension system. The first of those controllers uses the suspension deflection and the sprung mass velocity as feedback information, whereas the second one only requires the sprung mass velocity to compute the control acti…

Output feedbackEngineeringFrequency responseControl and Optimization:Informàtica::Automàtica i control [Àrees temàtiques de la UPC]Linear matrix inequalitiesVehicle suspensionsDesign strategyControl and Systems Engineering; Human-Computer Interaction; Computer Science Applications1707 Computer Vision and Pattern Recognition; Control and Optimization; Electrical and Electronic EngineeringFeedback control systemsMatrius (Matemàtica)Vehicles -- Ressorts i suspensió:93 Systems Theory; Control [Classificació AMS]Control theoryDeflection (engineering)ControlElectrical and Electronic EngineeringMatrix inequalitiesSuspension (vehicle)Controller design:93 Systems Theory [Classificació AMS]Vehicles--Springs and suspensionbusiness.industryLinear matrix inequality:Matemàtiques i estadística [Àrees temàtiques de la UPC]Control engineeringComputer Science Applications1707 Computer Vision and Pattern RecognitionVehicles -- Springs and suspensionComputer Science ApplicationsHuman-Computer InteractionControl and Systems EngineeringSistemes de control per retroaccióSprung massbusinessStatic output-feedback control
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Static output-feedback control for vehicle suspensions: a single-step linear matrix inequality approach

2013

In this paper, a new strategy to design static output-feedback controllers for a class of vehicle suspension systems is presented. A theoretical background on recent advances in output-feedback control is first provided, which makes possible an effective synthesis of static output-feedback controllers by solving a single linear matrix inequality optimization problem. Next, a simplified model of a quarter-car suspension system is proposed, taking the ride comfort, suspension stroke, road holding ability, and control effort as the main performance criteria in the vehicle suspension design. The new approach is then used to design a static output-feedbackH∞controller that only uses the suspensi…

Output feedbackEngineeringOptimization problemArticle Subject:Informàtica::Automàtica i control [Àrees temàtiques de la UPC]General MathematicsSingle stepFeedback control systemsMatrius (Matemàtica)Vehicles -- Ressorts i suspensió:93 Systems Theory; Control [Classificació AMS]Deflection (engineering)Control theoryControlMatrix inequalitiesSuspension (vehicle):93 Systems Theory [Classificació AMS]Vehicles--Springs and suspensionbusiness.industrylcsh:MathematicsGeneral EngineeringLinear matrix inequality:Matemàtiques i estadística [Àrees temàtiques de la UPC]Control engineeringlcsh:QA1-939lcsh:TA1-2040Sistemes de control per retroaccióSprung masslcsh:Engineering (General). Civil engineering (General)business
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New results on H∞ dynamic output feedback control for Markovian jump systems with time-varying delay and defective mode information

2013

SUMMARY This paper investigates the problem of delay-dependent H∞ dynamic output feedback control for a class of discrete-time Markovian jump linear systems (MJLSs). The systems under consideration are subject to time-varying delay and defective mode information. The defective transition probabilities comprise of three types: exactly known, uncertain, and unknown. By employing a two-term approximation for the time-varying delay, the original MJLSs can be equivalently converted into a feedback interconnection form, which contains a forward subsystem with constant time-delays and a feedback one with norm-bounded uncertainties. Then, based on the scaled small-gain theorem, the problem is there…

Output feedbackInterconnectionControl and OptimizationControl and Systems EngineeringLinearizationControl theoryApplied MathematicsFace (geometry)Control (management)Mode (statistics)Constant (mathematics)SoftwareMathematicsOptimal Control Applications and Methods
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H<inf>∞</inf> synchronization of Markovian jump master-slave systems with delay

2012

The problem of synchronization is investigated for a class of master-slave systems with time-varying delays and Markovian switching parameters. Using an appropriate Lyapunov-Krasovskii functional, a synchronization law which includes the master-slave parameters is established for designing a mode-dependent output feedback control law in terms of LMIs. A numerical example is given to show the effectiveness of the method.

Output feedbackMarkovian jumpComputer Science::Systems and ControlControl theoryH controlMaster/slaveMarkovian switchingSynchronizationMathematics2012 12th International Conference on Control Automation Robotics & Vision (ICARCV)
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