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1 to 9 of 9 results
  • Observation of chaotic behavior in automatic tuning loops for continuous-time filters

     Martínez García, Herminio; Cosp Vilella, Jordi; Manzanares Brotons, Manuel
    IEEE International Midwest Symposium on Circuits and Systems
    Presentation's date: 2014-08
    Presentation of work at congresses

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    he appropriate linear dynamic modeling of continuous-time filters (CTFs) with automatic tuning loops should be obtained to assure stability in case an improved design of the loop controllers is to be carried out. With this aim, starting from a general and systematic analysis in order to obtain an equivalent small-signal linearized incremental model, from which transfer functions between output variables and control voltages are derived, the subsequent design of compensated loops with enhanced stability and dynamic performance is required. This systematic procedure allows obtaining improved controllers for the two involved control loops. However, CTFs with automatic tuning loops are nonlinear feedback systems with potential instability. What is more, nonlinear phenomena, which cannot be predicted by a design-oriented small signal modeling approach, are observed in this kind of tuning systems. The purpose of this work is to highlight that when control parameters are varied, the system could present different kinds of dynamical nonlinear phenomena such as bifurcations and chaotic behavior, which cannot be predicted by the small signal design-oriented model.

  • Observation of chaotic behavior in automatic tuning loops for continuous¿time filters

     Martínez García, Herminio; Cosp Vilella, Jordi; Manzanares Brotons, Manuel
    IEEE International Midwest Symposium on Circuits and Systems
    Presentation's date: 2013-08-06
    Presentation of work at congresses

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    The appropriate linear dynamic modeling of continuous¿time filters (CTFs) with automatic tuning loops should be obtained to assure stability in case an improved design of the loop controllers is to be carried out. With this aim, starting from a general and systematic analysis in order to obtain an equivalent small¿signal linearized incremental model, from which transfer functions between output variables and control voltages are derived, the subsequent design of compensated loops with enhanced stability and dynamic performance is required. This systematic procedure allows obtaining improved controllers for the two involved control loops. However, CTFs with automatic tuning loops are nonlinear feedback systems with potential instability. What is more, nonlinear phenomena, which cannot be predicted by a design-oriented small signal modeling approach, are observed in this kind of tuning systems. The purpose of this work is to highlight that when control parameters are varied, the system could present different kinds of dynamical nonlinear phenomena such as bifurcations and chaotic behavior, which cannot be predicted by the small signal design-oriented model.

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    A simplified LPV model for mobile robots navigation with audio features  Open access

     Manzanares Brotons, Manuel; Bolea Monte, Yolanda; Grau Saldes, Antoni
    International Conference ¿System Identification and Control Problems¿
    Presentation's date: 2012-01-31
    Presentation of work at congresses

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  • Robust audio localization for mobile robots in industrial environments

     Manzanares Brotons, Manuel; Bolea Monte, Yolanda; Grau Saldes, Antoni
    Date of publication: 2011-04
    Book chapter

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    An identified LPV model for mobile robots navigation with audio features  Open access

     Manzanares Brotons, Manuel; Bolea Monte, Yolanda; Grau Saldes, Antoni
    IEEE International Conference on Industrial Electronics
    Presentation's date: 2010-11-09
    Presentation of work at congresses

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    Non-speech audio is becoming more attractive to be used as features to mobile robots navigation in industrial environments. In this paper authors present their advances in determining robot’s position in indoor spaces using as sound sources industrial machines. A novel model is build to locate the robot under different spaces. An identification process is used to obtain the LPV model and it is validated using a real robot. Some uncertainties due to the robot motion and other factors have been taken into account when determining the robot’s position and the obtained results demonstrate the validity of the model.

  • Técnica de localización de móviles en plantas industriales basada en el estudio de señales de audio estacionarias

     Manzanares Brotons, Manuel; Bolea Monte, Yolanda; Grau Saldes, Antoni
    Jornadas de Automática
    Presentation's date: 2009-09-02
    Presentation of work at congresses

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    Sostenibilitat en el transport- optimització del consum de combustible  Open access

     Llumà Fuentes, Jordi; Manzanares Brotons, Manuel
    Congrés UPC Sostenible 2015
    Presentation's date: 2007-07-12
    Presentation of work at congresses

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    La reducció del dispendi d’energia d’un vehicle es pot minimitzar mitjançant un ús adequat del sistema propulsor. El mètode desenvolupat implica l’elaboració d’un model numèric del vehicle i una descripció matemàtica de la via (perfil altimètric i traçat) per poder-lo similar en un ordinador. Amb un mètode d’optimització numèrica es pot cercar el mínim de consum d’energia i la millor relació de transmissió possible. El mètode va ser comprovat en el vehicle “Centenari” (un prototipus de vehicle de baix consum), assolint una reducció del 34% en el consum de gasolina, i permetent al vehicle recorre 1066 km amb només 1 litre de benzina.

  • ECU: Sistemas electrónicos de inyección en motores de combustión interna

     Manzanares Brotons, Manuel; Llumà Fuentes, Jordi; Domingo Peña, Joan; Alonso, C.; García Gamundi, Jaime
    Congreso Universitario de Innovación Educativa en las Enseñanzas Técnicas
    Presentation's date: 2004-06-26
    Presentation of work at congresses

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  • Controlador fuzzy para un motor de combustión interna

     Manzanares Brotons, Manuel; Domingo Peña, Joan
    Seminario Anual de Automática, Electrónica Industrial e Instrumentación
    Presentation's date: 2003-09
    Presentation of work at congresses

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    En la presente comunicación se exponen los principios de la inyección electrónica de carburante en motores de combustión interna. Se presenta el principio de operación de un sistema comercial de control electrónico del combustible y los elementos que ha de incorporar un controlador lógico fuzzy que supla dicho sistema comercial haciéndolo más manejable que los sistemas actuales. Este trabajo se está desarrollando íntegramente en la EUETIB dentro del proyecto Eco Shell-Marathon que lleva a término el grupo EEEI (Eco Enginys Escola Industrial) y cuyo objetivo es conseguir que un vehículo con motor de combustión a gasolina recorra la máxima distancia posible con un solo litro de carburante.