Now showing items 1-20 of 21

  • A discrete-time technique for the steady-state analysis of nonlinear class-E amplifiers 

    Águila López, Francisco del; Palà Schönwälder, Pere; Molina Gaudó, Pilar; Mediano Heredia, Arturo (Institute of Electrical and Electronics Engineers (IEEE), 2007-06-11)
    Article
    Open Access
    Switched circuits are widely used, particularly for power electronic applications in which efficiency is important. Of these applications, the class-E amplifier has been given particular attention, since it is theoretically ...
  • A necessary and sufficient condition for total observability of discrete-time linear time-varying systems 

    Witczak, Marcin; Puig Cayuela, Vicenç; Rotondo, Damiano; Witczak, Piotr (2017)
    Conference report
    Open Access
    This paper deals with the total observability problem of discrete-time linear time-varying systems. In particular, a review and suitable analysis of the state-of-the-art of this emerging area are provided. Subsequently, ...
  • A new passive repetitive controller for discrete-time finite-frequency positive-real systems 

    Costa Castelló, Ramon; Wang, Danwei; Griñó Cubero, Robert (IEEE Control Systems Society, 2007)
    Conference report
    Open Access
    This work proposes a new repetitive controller for discrete-time finite-frequency positive-real systems which are required to track periodic references or to attenuate periodic disturbances. The main characteristic of the ...
  • An incremental hybrid system diagnoser automaton enhanced by discernibility properties 

    Vento Maldonado, Jorge I.; Travé-Massuyès, Louise; Puig Cayuela, Vicenç; Sarrate Estruch, Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2014-12-18)
    Article
    Restricted access - publisher's policy
    This paper proposes a method to track the system mode and diagnose a hybrid system without building an entire diagnoser off-line. The method is supported by a hybrid automaton (HA) model that represents the hybrid system ...
  • A passive repetitive controller for discrete-time finite-frequency positive-real systems 

    Costa Castelló, Ramon; Wang, Danwei; Griñó Cubero, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2009-04)
    Article
    Open Access
    This work proposes and studies a new internal model for discrete-time passive or finite-frequency positive-real systems which can be used in repetitive control designs to track or to attenuate periodic signals. The main ...
  • A robust asynchronous sampled-data control design for nonlinear systems with actuator failures 

    Acho Zuppa, Leonardo; Buenestado Caballero, Pablo (Multidisciplinary Digital Publishing Institute, 2017-08-26)
    Article
    Open Access
    This paper presents a recent self-sampled-data control algorithm applied to nonlinear systems with actuator failures. Our approach uses the linear model of a given nonlinear system, and based on a granted actuator fault ...
  • Comprehensive high speed automotive SM-PMSM torque control stability analysis including novel control approach 

    Arias Pujol, Antoni; Ibarra Basabe, Edorta; Trancho, Elena; Griñó Cubero, Robert; Kortabarria, Iñigo; Caum Aregay, Jesús (2019-07-01)
    Article
    Restricted access - publisher's policy
    Permanent magnet synchronous machines (PMSM) are widely used in the automotive industry for electric vehicle (EV) and hybrid electric vehicle (HEV) propulsion systems, where the trend is to achieve high mechanical speeds. ...
  • Desenvolupament d'eines de suport a la simulació basada en esdeveniments discrets de sistemes de fabricació flexible 

    Olivar Morente, Ariadna (Universitat Politècnica de Catalunya, 2016-09)
    Master thesis (pre-Bologna period)
    Open Access
    Aquest projecte es centra en potenciar i incrementar les funcionalitats d’un programari de simulació basada en esdeveniments discrets, Arena, mitjançant el desenvolupament d’una eina informàtica complementària capaç de ...
  • Diagnosis of icing and actuator faults in UAVs using LPV unknown input observers 

    Rotondo, Damiano; Cristofaro, Andrea; Johansen, Tor Arne; Nejjari Akhi-Elarab, Fatiha; Puig Cayuela, Vicenç (2017-10-05)
    Article
    Open Access
    This paper proposes a discrete-time linear parameter varying (LPV) unknown input observer (UIO) for the diagnosis of actuator faults and ice accretion in unmanned aerial vehicles (UAVs). The proposed approach, which is ...
  • Digital Repetitive Control of a Three-Phase Four-Wire Shunt Active Filter 

    Griñó Cubero, Robert; Cardoner Parpal, Rafel; Costa Castelló, Ramon; Fossas Colet, Enric (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-06-30)
    Article
    Open Access
    Shunt active power filters have been proved as useful elements to correct distorted currents caused by nonlinear loads in power distribution systems. This paper presents an all-digital approach based on a particular ...
  • Discrete-time retrial queue with Bernoulli vacation, preemptive resume and feedback customers 

    Chen, Peishu; Zhou, Yongwu; Li, Changwen (OmniaScience, 2015-10)
    Article
    Open Access
    Purpose: We consider a discrete-time Geo/G/1 retrial queue where the retrial time follows a general distribution, the server subject to Bernoulli vacation policy and the customer has preemptive resume priority, Bernoulli ...
  • Disturbance Observer based Repetitive Controller for Time-Delay Systems 

    Na, Jing; Costa Castelló, Ramon; Griñó Cubero, Robert; Xuemei, Ren (2009-09-22)
    Conference report
    Open Access
    This paper presents a discrete control design for time-delay systems subjected to the periodical command signal or exogenous disturbances. Unlike other deadtime compensators (DTC), we take profit of the system components ...
  • Estudio y aplicación de métodos de identificación paramétrica en sistemas de tiempo discreto y su validación en equipos didácticos de laboratorio 

    Vázquez Rey, Daniel (Universitat Politècnica de Catalunya, 2017-05-15)
    Bachelor thesis
    Open Access
    En este proyecto se realiza la identificación paramétrica de diferentes sistemas, utilizando Matlab y su Toolbox de Identificación de sistemas. Para realizar dicha identificación, primero se diseña y se construye un generador ...
  • Feedback passivity of nonlinear discrete-time systems with direct input-output link 

    Navarro López, Eva María; Fossas Colet, Enric (Elsevier, 2004-03)
    Article
    Open Access
    This paper is devoted to the study of the feedback passivity property in nonlinear discrete-time systems. The relative degree and zero dynamics of the non-passive system are related to the feedback passivity of the system. ...
  • Modelització i millora de la logística de cues aplicades a un negoci de mercat mitjançant la simulació d'events discrets 

    Manich Reventós, Anna (Universitat Politècnica de Catalunya, 2016-09)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    Aquest projecte vol contrastar el model implementat a dia d’avui en el circuit de compra seguit als primers mercats de fresc que funcionen a Barcelona amb el model proposat per l’empresa Penwin com una possible millora ...
  • Overlapping guaranteed cost control for time-varying discrete-time uncertain systems 

    Bakule, Lubomir; Rodellar Benedé, José; Rossell Garriga, Josep Maria (Institute of Electrical and Electronics Engineers (IEEE), 2002)
    Conference report
    Open Access
    The paper presents results on the inclusion principle for uncertain, nominally linear, time-varying, discrete-time systems. The systems under consideration have time-varying norm-bounded parameter uncertainties in both ...
  • Overlapping guaranteed cost control for uncertain discrete-time systems 

    Bakule, Lubomir; Rodellar Benedé, José; Rossell Garriga, Josep Maria (IFAC. International Federation of Automatic Control, 2004)
    Conference lecture
    Open Access
    Robust overlapping guaranteed cost control problem is presented for a class of state-delayed discrete-time systems. Unknown arbitrarily time-varying uncertainties with given known bounds are considered. Conditions preserving ...
  • Overlapping LQ control of discrete-time time-varying systems 

    Bakule, Lubomir; Rodellar Benedé, José; Rossell Garriga, Josep Maria (2001)
    Conference report
    Open Access
    Overlapping decentralized linear quadratic control design problem for discrete-time time-varying systems is solved by using generalized selection of complementary matrices. Explicit conditions on the structure of complementary ...
  • Sistemes de control en temps discret 

    Costa Castelló, Ramon; Fossas Colet, Enric (Universitat Politècnica de Catalunya. Iniciativa Digital Politècnica, 2014)
    Book
    Open Access
    Aquest llibre presenta una introducció als sistemes dinàmics lineals de temps discret. Primerament s’analitzen els conceptes d’estabilitat, resposta temporal i resposta frequ¨encial seguint un plantejament clàssic ...
  • Solving Diagnosability of Hybrid Systems via Abstraction and Discrete Event Techniques 

    Grastien, Alban; Travé-Massuyès, Louise; Puig Cayuela, Vicenç (2017-07-01)
    Article
    Open Access
    This paper addresses the problem of determining the diagnosability of hybrid systems by abstracting hybrid models to a discrete event setting. From the continuous model the abstraction only remembers two pieces of information: ...