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    Optimal design of complex passive-damping systems for vibration control of large structures: an energy-to-peak approach  Open access

     Palacios Quiñonero, Francisco; Rubió Massegú, Josep; Rossell Garriga, Josep Maria; Karimi, Hamid Reza
    Abstract and applied analysis
    Date of publication: 2014-06
    Journal article

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    We present a new design strategy that makes it possible to synthesize decentralized output-feedback controllers by solving two successive optimization problems with linear matrix inequality (LMI) constraints. In the initial LMI optimization problem, two auxiliary elements are computed: a standard state-feedback controller, which can be taken as a reference in the performance assessment, and a matrix that facilitates a proper definition of the main LMI optimization problem. Next, by solving the second optimization problem, the output-feedback controller is obtained. The proposed strategy extends recent results in static output-feedback control and can be applied to design complex passive-damping systems for vibrational control of large structures. More precisely, by taking advantages of the existing link between fully decentralized velocity-feedback controllers and passive linear dampers, advanced active feedback control strategies can be used to design complex passive-damping systems, which combine the simplicity and robustness of passive control systems with the efficiency of active feedback control. To demonstrate the effectiveness of the proposed approach, a passive-damping system for the seismic protection of a five-story building is designed with excellent results.

    We present a new design strategy that makes it possible to synthesize decentralized output-feedback controllers by solving two successive optimization problems with linear matrix inequality (LMI) constraints. In the initial LMI optimization problem, two auxiliary elements are computed: a standard state-feedback controller, which can be taken as a reference in the performance assessment, and a matrix that facilitates a proper definition of the main LMI optimization problem. Next, by solving the second optimization problem, the output-feedback controller is obtained. The proposed strategy extends recent results in static output-feedback control and can be applied to design complex passive-damping systems for vibrational control of large structures. More precisely, by taking advantages of the existing link between fully decentralized velocity-feedback controllers and passive linear dampers, advanced active feedback control strategies can be used to design complex passive-damping systems, which combine the simplicity and robustness of passive control systems with the efficiency of active feedback control. To demonstrate the effectiveness of the proposed approach, a passive-damping system for the seismic protection of a five-story building is designed with excellent results.

  • Feasibility issues in static output-feedback controller design with application to structural vibration control

     Palacios Quiñonero, Francisco; Rubió Massegú, Josep; Rossell Garriga, Josep Maria; Karimi, Hamid Reza
    Journal of the Franklin Institute
    Date of publication: 2014-01
    Journal article

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    Recent results in output-feedback controller design make possible an efficient computation of static output-feedback controllers by solving a single-step LMI optimization problem. This new design strategy is based on a simple transformation of variables, and it has been applied in the field of vibration control of large structures with positive results. There are, however, some feasibility problems that can compromise the effectiveness and applicability of the new approach. In this paper, we present some relevant properties of the variable transformations that allow devising an effective procedure to deal with these feasibility issues. The proposed procedure is applied in designing a static velocity-feedback H8 controller for the seismic protection of a five-story building with excellent results.

  • Vibration control for adjacent structures using local state information

     Palacios Quiñonero, Francisco; Rubió Massegú, Josep; Rossell Garriga, Josep Maria; Karimi, Hamid Reza
    Mechatronics
    Date of publication: 2014-06
    Journal article

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    In this paper, a novel strategy for structural vibration control of multi-structure systems is presented. This strategy pays particular attention to mitigating negative interstructure interactions. Moreover, it is based on recent advances in static output¿feedback control, which make possible the efficient computation of decentralized velocity-feedback controllers by solving a single-step optimization problem with Linear Matrix Inequality constraints. To illustrate the main ideas, a local velocity-feedback energy-to-peak controller is designed for the seismic protection of a two-building system. This controller is remarkably effective and extremely simple. Moreover, it can also be implemented by a linear passive damper. To assess the effectiveness of the proposed controller, numerical simulations are conducted with positive results.

    In this paper, a novel strategy for structural vibration control of multi-structure systems is presented. This strategy pays particular attention to mitigating negative interstructure interactions. Moreover, it is based on recent advances in static output–feedback control, which make possible the efficient computation of decentralized velocity-feedback controllers by solving a single-step optimization problem with Linear Matrix Inequality constraints. To illustrate the main ideas, a local velocity-feedback energy-to-peak controller is designed for the seismic protection of a two-building system. This controller is remarkably effective and extremely simple. Moreover, it can also be implemented by a linear passive damper. To assess the effectiveness of the proposed controller, numerical simulations are conducted with positive results.

  • Comparison of the occupational hazards in the Spanish mining sector based on the type of worplace in the period 2003-2012

     Sanmiquel Pera, Lluis; Freijo Alvarez, Modesto; Rossell Garriga, Josep Maria; Bascompta Massanés, Marc
    Archivos de prevención de riesgos laborales
    Date of publication: 2014-05-22
    Journal article

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  • Discrete-time static output-feedback H-infinity controller design for vehicle suspensions

     Palacios Quiñonero, Francisco; Rubió Massegú, Josep; Rossell Garriga, Josep Maria; Karimi, Hamid Reza
    International Conference on Mechatronics and Control
    Presentation's date: 2014-07-05
    Presentation of work at congresses

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    This paper provides a direct and practical presentation of a novel methodology for static output-feedback controller design. The proposed design strategy has been successfully applied in the fields of control systems for seismic protection of large buildings and multi-building structures, control of offshore wind turbines, and active control of vehicle suspensions. The positive results obtained in these initial applications clearly indicate that this approach could be an effective tool in a large variety of control problems, for which an LMI formulation of the statefeedback version of the problem is available. The main objective of the paper is to facilitate a brief and friendly presentation of the main ideas involved in the new design methodology. To this end, a discrete-time static output-feedback H1 controller is designed for a simplified quarter-car suspension system. Numerical simulations indicate that the proposed controller exhibits a remarkably good behavior when compared with the corresponding statefeedback H1 controller.

    This paper provides a direct and practical presentation of a novel methodology for static output feedback controller design. The proposed design strategy has been successfully applied in the fields of control systems for seismic protection of large buildings and multi-building structures, control of offshore wind turbines, and active control of vehicle suspensions. The positive results obtained in these initial applications clearly indicate that this approach could be an effective tool in a large variety of control problems, for which an LMI formulation of the statefeedback version of the problem is available. The main objective of the paper is to facilitate a brief and friendly presentation of the main ideas involved in the new design methodology. To this end, a discrete-time static output-feedback H1 controller is designed for a simplified quarter-car suspension system. Numerical simulations indicate that the proposed controller exhibits a remarkably good behavior when compared with the corresponding statefeedback H1 controller.

  • Comparison of the occupational hazards in the Spanish mining sector based on the type of workplace in the period 2003-2012

     Sanmiquel Pera, Lluis; Freijo Alvarez, Modesto; Rossell Garriga, Josep Maria; Bascompta Massanés, Marc
    International Conference on Occupational Risk Prevention
    Presentation's date: 2014-05-22
    Presentation of work at congresses

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    Methods and background: This review has done a comparison of the 3 types of workplace in the Spanish mining sector. The 3 workplaces considered are: mines, quarries and mineral processing plants. The 10 most frequent accidents and deviations have been obtained for each one. It has also been calculated the annual incidence, frequency, average duration and severity indexes as well as the risk index for each one. Besides, the accident distribution has been modelling, based on exponential distribution function of the lost days in the 3 workplaces mentioned. Results: The main sort of accident is due to physical overexertion and the principal deviation is the material collapsing from the roof of the mines, no coordinate movements in quarries and body movements because of physical overexertion in mineral processing plants.

    Methods and background: This review has done a comparison of the 3 types of workplace in the Spanish mining sector. The 3 workplaces considered are: mines, quarries and mineral processing plants. The 10 most frequent accidents and deviations have been obtained for each one. It has also been calculated the annual incidence, frequency, average duration and severity indexes as well as the risk index for each one. Besides, the accident distribution has been modelling, based on exponential distribution function of the lost days in the 3 workplaces mentioned. Results: The main sort of accident is due to physical overexertion and the principal deviation is the material collapsing from the roof of the mines, no coordinate movements in quarries and body movements because of physical overexertion in mineral processing plants.

  • Static output-feedback control for vehicle suspensions: a single-step linear matrix inequality approach

     Rubió Massegú, Josep; Palacios Quiñonero, Francisco; Rossell Garriga, Josep Maria; Karimi, Hamid Reza
    Mathematical problems in engineering
    Date of publication: 2013-12-20
    Journal article

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  • Static output-feedback control under information structure constraints

     Rubió Massegú, Josep; Rossell Garriga, Josep Maria; Karimi, Hamid Reza; Palacios Quiñonero, Francisco
    Automatica
    Date of publication: 2013-01
    Journal article

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    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 efficient methodology which permits us to obtain an isolated static output-feedback gain matrix having, simultaneously, a zero¿nonzero structure imposed a priori.

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    Sequential design of multioverlapping controllers for structural vibration control of tall buildings under seismic excitation  Open access

     Karimi, Hamid Reza; Palacios Quiñonero, Francisco; Rossell Garriga, Josep Maria; Rubió Massegú, Josep
    Proceedings of the Institution of Mechanical Engineers. Part I, journal of systems and control
    Date of publication: 2013-03-06
    Journal article

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    In this article, a computationally effective strategy to obtain multioverlapping controllers via the inclusion principle is applied to design a state-feedback multioverlapping linear-quadratic regulator controller for a 20-story building. The proposed semidecentralized controller only requires state information of neighboring stories to compute the corresponding control actions. This particular information exchange configuration allows introducing a dramatic reduction in the transmission range required for a wireless implementation of the communications system. More specifically, just a one-story transmission range is required by the proposed multioverlapping controller, while a full-building transmission range would be necessary in a classical centralized design. From a computational point of view, the presented design strategy only involves the actual computation of a reduced set of low-dimension controllers. The numerical simulations indicate that despite the simplified low-dimension design and the severe information exchange constraints, the proposed semidecentralized multioverlapping controller achieves a surprisingly high level of seismic attenuation when compared with the centralized linear-quadratic regulator controller.

    In this article, a computationally effective strategy to obtain multioverlapping controllers via the inclusion principle is applied to design a state-feedback multioverlapping linear-quadratic regulator controller for a 20-story building. The proposed semidecentralized controller only requires state information of neighboring stories to compute the corresponding control actions. This particular information exchange configuration allows introducing a dramatic reduction in the transmission range required for a wireless implementation of the communications system. More specifically, just a one-story transmission range is required by the proposed multioverlapping controller, while a full-building transmission range would be necessary in a classical centralized design. From a computational point of view, the presented design strategy only involves the actual computation of a reduced set of low-dimension controllers. The numerical simulations indicate that despite the simplified low-dimension design and the severe information exchange constraints, the proposed semidecentralized multioverlapping controller achieves a surprisingly high level of seismic attenuation when compared with the centralized linear-quadratic regulator controller.

  • Passive-damping design for structural vibration control: a velocity-feedback energy-to-peak approach

     Palacios Quiñonero, Francisco; Rossell Garriga, Josep Maria; Rubió Massegú, Josep; Karimi, Hamid Reza
    International Conference on Integrity, Reliability and Failure
    Presentation's date: 2013-06-24
    Presentation of work at congresses

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    In this work, we present a new methodology to design passive damping systems for structural vibrational control. The method uses recent advances in static output-feedback control to compute fully decentralized velocity-feedback controllers following an energy-to-peak approach. The application of the proposed methodology is illustrated through the design of a passive-damping system for seismic protection of a five-story building with excellent results.

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    Passive-damping design for vibration control of large structures  Open access

     Palacios Quiñonero, Francisco; Karimi, Hamid Reza; Rubió Massegú, Josep; Rossell Garriga, Josep Maria
    IEEE International Conference on Control and Automation
    Presentation's date: 2013-06-12
    Presentation of work at congresses

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    In this work, a systematic strategy to design passive damping systems for structural vibration control is presented. The proposed design methodology is based on the equivalence between decentralized static velocity-feedback controllers and passive damping systems. By using recent developments in static output-feedback control, the design of passivedamping systems can be formulated as a single optimization problem with Linear Matrix Inequality constraints. Moreover, this optimization problem can be efficiently solved with standard numerical tools, even for large dimension systems. Due to its computational effectiveness, the proposed methodology can be applied to the design of passive damping systems for large structures. To illustrate the main ideas and methods, a passive damping system is designed for the seismic protection of a five-story building with excellent results.

    In this work, a systematic strategy to design passive damping systems for structural vibration control is presented. The proposed design methodology is based on the equivalence between decentralized static velocity-feedback controllers and passive damping systems. By using recent developments in static output-feedback control, the design of passivedamping systems can be formulated as a single optimization problem with Linear Matrix Inequality constraints. Moreover, this optimization problem can be efficiently solved with standard numerical tools, even for large dimension systems. Due to its computational effectiveness, the proposed methodology can be applied to the design of passive damping systems for large structures. To illustrate the main ideas and methods, a passive damping system is designed for the seismic protection of a five-story building with excellent results.

    Postprint (author’s final draft)

  • Control activo de vibraciones en estructuras sometidas a excitaciones dinámicas multidireccionales

     Acho Zuppa, Leonardo; Palacios Quiñonero, Francisco; Rubió Massegú, Josep; Zapateiro De La Hoz, Mauricio Fabian; Karimi, Hamid Reza; Rossell Garriga, Josep Maria
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  • Semiactive-passive structural vibration control strategy for adjacent structures under seismic excitation

     Palacios Quiñonero, Francisco; Rubió Massegú, Josep; Rossell Garriga, Josep Maria; Karimi, Hamid Reza
    Journal of the Franklin Institute
    Date of publication: 2012-12-01
    Journal article

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    Discrete-time multioverlapping controller design for structural vibration control of tall buildings under seismic excitation  Open access

     Palacios Quiñonero, Francisco; Rubió Massegú, Josep; Rossell Garriga, Josep Maria; Karimi, Hamid Reza
    Mathematical problems in engineering
    Date of publication: 2012-10-22
    Journal article

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    In this paper, a computationally effective strategy to obtain multioverlapping controllers via the Inclusion Principle is applied to design discrete-time state-feedback multioverlapping LQR controllers for seismic protection of tall buildings. To compute the corresponding control actions, the proposed semidecentralized controllers only require state information from neighboring stories. This particular configuration of information exchange allows introducing a dramatic reduction in the transmission range required for a wireless implementation of the communication system. To investigate the behavior of the proposed semidecentralized multioverlapping controllers, a proper simulation model has been designed. This model includes semiactive actuation devices with limited force capacity, control sampling times consistent with the communication latency, time-delayed state information, and communication failures. The performance of the proposed multioverlapping controllers has been assessed through numerical simulations of the seismic response of a 20-story building with positive results.

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    Structural vibration control for a class of connected multistructure mechanical systems  Open access

     Palacios Quiñonero, Francisco; Rossell Garriga, Josep Maria; Rubió Massegú, Josep; Karimi, Hamid Reza
    Mathematical problems in engineering
    Date of publication: 2012-10-21
    Journal article

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    A mathematical model to compute the overall vibrational response of connected multistructure mechanical systems is presented. Using the proposed model, structural vibration control strategies for seismic protection of multibuilding systems can be efficiently designed. Particular attention is paid to the design of control configurations that combine passive interbuilding dampers with local feedback control systems implemented in the buildings. These hybrid active-passive control strategies possess the good properties of passive control systems and also have the high-performance characteristics of active control systems. Moreover, active-passive control configurations can be properly designed for multibuilding systems requiring different levels of seismic protection and are also remarkably robust against failures in the local feedback control systems. The application of the main ideas is illustrated by means of a three-building system, and numerical simulations are conducted to assess the performance of the proposed structural vibration control strategies.

  • Decentralized static output-feedback H infinity controller design for buildings under seismic excitation

     Rubió Massegú, Josep; Palacios Quiñonero, Francisco; Rossell Garriga, Josep Maria
    Earthquake engineering and structural dynamics
    Date of publication: 2012-06
    Journal article

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  • Optimal passive-damping design using a decentralized velocity-feedback H-infinity approach

     Palacios Quiñonero, Francisco; Rubió Massegú, Josep; Rossell Garriga, Josep Maria; Karimi, Hamid Reza
    Modeling identification and control
    Date of publication: 2012-12-16
    Journal article

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  • Exploratory analysis of Spanish energetic mining accidents

     Sanmiquel Pera, Lluis; Freijo Alvarez, Modesto; Rossell Garriga, Josep Maria
    International journal of occupational safety and ergonomics
    Date of publication: 2012
    Journal article

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    A mathematical framework for structural control integration  Open access

     Rossell Garriga, Josep Maria; Rodellar Benede, Jose Julian; Palacios Quiñonero, Francisco; Rubió Massegú, Josep
    International Conference Smart Materials, Structures and Systems
    Presentation's date: 2012-09
    Presentation of work at congresses

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    In this paper, some control strategies to design decentralized controllers are developed and discussed. These strategies are based on the Inclusion Principle, a very useful mathematical framework to obtain decentralized controllers, mainly when the systems are composed by overlapped subsystems sharing common parts. A five-story building model serves as example to show the advantages provided by this approach. Numerical simulations are conducted to assess the performance of the proposed control laws with positive results.

    In this paper, some control strategies to design decentralized controllers are developed and discussed. These strategies are based on the Inclusion Principle, a very useful mathematical framework to obtain decentralized controllers, mainly when the systems are composed by overlapped subsystems sharing common parts. A ve-story building model serves as example to show the advantages provided by this approach. Numerical simulations are conducted to assess the performance of the proposed control laws with positive results.

    Postprint (author’s final draft)

  • Multilingual formulae: Material didàctic amb la verbalització de llenguatge simbòlic en català, castellà i anglès  Open access

     Alsina Aubach, Montserrat; Argelaguet Isanta, Maria Rosa; Bonet Dalmau, Jordi; del Águila López, Francisco; Fortuny Santos, Jordi; Gamisans Noguera, Javier; Giralt Mas, M. Rosa; Lao Luque, Concepcion; Martinez Teixidor, Inmaculada; Palà Schönwälder, Pere; Rossell Garriga, Josep Maria; Soler Lorente, Monica; Ventura Capell, Enric; Vila Marta, Sebastian
    Jornada d'Innovació Docent UPC
    Presentation's date: 2012
    Presentation of work at congresses

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  • Discrete-time static output-feedback semi-decentralized H-infinity controller design: an application to structural vibration control

     Palacios Quiñonero, Francisco; Rubió Massegú, Josep; Rossell Garriga, Josep Maria; Karimi, Hamid Reza
    American Control Conference
    Presentation's date: 2012-06-27
    Presentation of work at congresses

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  • Experimental study of an active control for a faulty perturbed flexible structure

     Acho Zuppa, Leonardo; Pujol Vazquez, Gisela; Rossell Garriga, Josep Maria
    Mediterranean Conference on Control and Automation
    Presentation's date: 2012-07-04
    Presentation of work at congresses

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  • Estrategias avanzadas de control estructural para mitigar los efectos de las cargas dinámicas en los aerogeneradores offshore flotantes. Advanced structural control strategies for mitigating the dynamic load effects on floating offshore wind turbines

     Rossell Garriga, Josep Maria; Palacios Quiñonero, Francisco; Rubió Massegú, Josep; Luo, Ningsu; Acho Zuppa, Leonardo; Zapateiro De La Hoz, Mauricio Fabian; Karimi, Hamid Reza; Luigi Botasso, Carlo
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  • Estrategias avanzadas de control estructural para mitigar los efectos de las cargas dinámicas en los aerogener. offshore flotantes

     Acho Zuppa, Leonardo; Palacios Quiñonero, Francisco; Rubió Massegú, Josep; Vidal Segui, Yolanda; Rossell Garriga, Josep Maria
    Participation in a competitive project

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  • Order regularity for Birkhoff interpolation with lacunary polynomials

     Palacios Quiñonero, Francisco; Rubio Diaz, Pedro; Díaz Barrero, José Luis; Rossell Garriga, Josep Maria
    Mathematica Aeterna
    Date of publication: 2011-06-01
    Journal article

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    Semi-decentralized strategies in structural vibration control  Open access

     Palacios Quiñonero, Francisco; Rossell Garriga, Josep Maria; Karimi, Hamid Reza
    Modeling identification and control
    Date of publication: 2011
    Journal article

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    In this work, the main ideas involved in the design of overlapping and multi-overlapping controllers via the Inclusion Principle are discussed and illustrated in the context of the Structural Vibration Control of tall buildings under seismic excitation. A detailed theoretical background on the Inclusion Principle and the design of overlapping controllers is provided. Overlapping and multi-overlapping LQR controllers are designed for a simpli ed ve-story building model. Numerical simulations are conducted to asses the performance of the proposed semi-decentralized controllers with positive results.

  • Semi-decentralized strategies in structural vibration control

     Rossell Garriga, Josep Maria; Palacios Quiñonero, Francisco
    Engineering Conference Southern Norway
    Presentation's date: 2011-05-12
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  • Some decentralized control strategies for large-scale systems

     Rossell Garriga, Josep Maria; Palacios Quiñonero, Francisco
    Seminario Transpirenaico en Control y Sistemas Mecatrónicos
    Presentation's date: 2011-11-15
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    Landing gear suspension control through adaptive backstepping techniques with H-infinity performance  Open access

     Pozo Montero, Francesc; Zapateiro De La Hoz, Mauricio Fabian; Rossell Garriga, Josep Maria; Karimi, Hamid Reza; Luo, Ningsu
    World Congress of the International Federation of Automatic Control
    Presentation's date: 2011-08-28
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    Landing gear suspension systems ful ll the tasks of absorbing the vertical energy of the touch-down as well as providing passenger and crew comfort with a smooth ground ride before take-o and after landing. They are also designed to have optimal performance in the case of a hard landing. In general, the tasks of aircraft landing gears are complex and sometimes lead to a number of contradictory requirements. Although there are existing modi cations of aircraft shock absorbers to reduce the problem, the basic design con ict between the requirements for landing and for rolling cannot be fully overcome by a passive suspension layout. Active and semiactive suspension techniques are a solution to this problem and are capable of reducing fuselage vibrations e ectively. In order to get satisfactory damping performance with active and semiactive devices, appropriate control laws must be employed. In this paper, we study the use of an adaptive backstepping control with H-infinity performance to cope with disturbances, uncertainties and nonlinearities, typical of suspension systems and damping devices. A comparison between active and semiactive strategies is provided through the analysis of simulation results

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    Decentralized H-infinity control of systems with information structure constraints  Open access

     Rossell Garriga, Josep Maria; Palacios Quiñonero, Francisco; Luo, Ningsu; Mañosa Fernández, Víctor
    Workshop on Control Dynamics, Monitoring and Applications
    Presentation's date: 2011-02-07
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    The paper deals with a class of continuous-time statedelayed uncertain systems considering H-infinity control. The main objective is to design static output feedback controllers satisfying three requirements simultaneously: asymptotic stability for the closed-loop system, a minimum effect of the disturbance input on the controlled output, and the obtention of a gain matrix having an arbitrarily preassigned zerononzero structure. To solve this problem, a linear matrix inequality (LMI) delay-independent approach is derived. A numerical example illustrates the effectiveness of the proposed method

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    Control strategies for large-scale structural systems: high-raise buildings and multi-building systems  Open access

     Palacios Quiñonero, Francisco; Rodellar Benede, Jose Julian; Rossell Garriga, Josep Maria; Rubió Massegú, Josep
    Workshop on Control Dynamics, Monitoring and Applications
    Presentation's date: 2011-02-07
    Presentation of work at congresses

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    This work presents an overview of some recent developments made by the authors in the field of vibrational control of largescale structural systems subject to seismic excitations. The structural systems under consideration are classified in two broad categories: (i) high-rise buildings, and (ii) multi-building systems. When dealing with high-rise buildings, the inclusion principle can be used as a powerful mathematical tool to design semi-decentralized state-feedback and output-feedback controllers. In the case of multi-building systems, a passive-active structural vibration control for adjacent buildings consisting in a combination of passive linking elements with an active decentralized control system is designed. Numerical simulations show that the overall active-passive control system achieves excellent results when the active control system works; in case of full or partial failure of the active control system, a remarkable reduction in the vibrational response is guaranteed by the passive linking elements. Three different building models serve as example to clarify the theoretical results and, at the same time, to show the advantages of the proposed control approaches

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    Active-passive control strategy for adjacent buildings  Open access

     Palacios Quiñonero, Francisco; Rossell Garriga, Josep Maria; Rodellar Benede, Jose Julian; Karimi, Hamid Reza
    American Control Conference
    Presentation's date: 2011-07-01
    Presentation of work at congresses

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    In this paper, a control strategy to mitigate the vibrational response of adjacent buildings under seismic excitation is presented. The proposed strategy combines interbuilding passive actuators with active actuators placed in the building stories. The main ideas are presented by means of a simplified two-building model; however, a semi-decentralized overlapping approach via the inclusion principle has been used to impose a proper information exchange structure suitable for wireless control of large buildings. Numerical simulations have been carried out to assess the performance of the proposed methodology with promising results. The overall control system exhibits some degree of fault-tolerance since only partial degradation of the control performance results from partial failures of the control system.

  • Passive-active vibration control for connected multi-building structures

     Palacios Quiñonero, Francisco; Rossell Garriga, Josep Maria; Rodellar Benede, Jose Julian; Pons López, Raul
    European Conference on Structural Dynamics
    Presentation's date: 2011-07-06
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    Active-passive decentralized H-infinity control for adjacent buildings under seismic excitation  Open access

     Palacios Quiñonero, Francisco; Rossell Garriga, Josep Maria; Rodellar Benede, Jose Julian; Karimi, Hamid Reza
    World Congress of the International Federation of Automatic Control
    Presentation's date: 2011-08-28
    Presentation of work at congresses

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    In this paper, a control strategy to reduce the vibrational response of adjacent buildings under seismic excitation is presented. The proposed strategy combines passive linking elements with an active decentralized H-infinity control system. The overall active-passive control system admits decentralized design and operation, and achieves an excellent vibrational reduction when the active control system works; in case of a full or partial failure of the active control system, a remarkable reduction in the vibrational response is guaranteed by the passive linking elements. For adjacent buildings that require different levels of seismic protection, the implementation of an active H-infinity control system in just one of the buildings is also considered. The main ideas are presented by means of a simplified two-building model. Numerical simulations have been carried out to assess the performance of the proposed methodology with promising results

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    Desigualtats matricials útils en el control robust  Open access

     Rubió Massegú, Josep; Palacios Quiñonero, Francisco; Rossell Garriga, Josep Maria
    Date: 2011-03-17
    Report

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    En aquest treball presentem un recull de les desigualtats matricials més freqüentment utilitzades en el context del control robust amb possibles retardaments, a temps continu o discret. Juntament amb les demostracions de les desigualtats, també s'inclou una breu descripció d'altres materials d'interès, com són els complements de Schur i la fórmula de Sherman-Morrison-Woodbury.

  • Information sciences

     Rossell Garriga, Josep Maria
    Collaboration in journals

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  • Information sciences

     Rossell Garriga, Josep Maria
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  • International journal of management science and engineering management

     Rossell Garriga, Josep Maria
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  • Mathematical reviews

     Rossell Garriga, Josep Maria
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  • Analysis of work related accidents in the Spanish mining sector from 1982-2006

     Sanmiquel Pera, Lluis; Freijo Alvarez, Modesto; Edo Tomas, Joaquin Jesus; Rossell Garriga, Josep Maria
    Journal of safety research
    Date of publication: 2010-02
    Journal article

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    Sequential design of multi-overlapping controllers for longitudinal multi-overlapping systems  Open access

     Palacios Quiñonero, Francisco; Rodellar Benede, Jose Julian; Rossell Garriga, Josep Maria
    Applied mathematics and computation
    Date of publication: 2010-10-01
    Journal article

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    In this paper a strategy to design multi-overlapping controllers for systems with longitudinal multi-overlapping structure is presented. The design process uses the inclusion principle to carry out a multi-step expansion that allows the decentralized design of a sequence of expanded local controllers. These expanded local controllers are subsequently contracted to produce a multi-overlapping controller that can be implemented in the original system. To illustrate the proposed methodology, the response of a four-story building under a seismic excitation is considered.

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    Feedback vibration control of a base-isolated building with delayed measurements using H-infinity techniques  Open access

     Karimi, Hamid Reza; Zapateiro De La Hoz, Mauricio Fabian; Luo Ren, Ningsu; Rossell Garriga, Josep Maria
    American Control Conference
    Presentation's date: 2010-06-30
    Presentation of work at congresses

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    In this paper we address the problem of vibration reduction of buildings with delayed measurements, where the delays are time-varying and bounded. We focus on a convex optimization approach to the problem of state-feedback H-infinity control design. An appropriate Lyapunov-Krasovskii functional and some free weighting matrices are used to establish some delay-range-dependent sufficient conditions for the design of desired controllers in terms of linear matrix inequalities (LMIs). The controller, which guarantees asymptotic stability and an H∞ performance, simultaneously, for the closed-loop system of the structure, is then developed. The performance of the controller is evaluated through the simulation of an n-story base-isolated building

  • Analysis of spanish non-energetic mining accidents: age, experience and size of the work centers

     Sanmiquel Pera, Lluis; Vintro Sanchez, Carla; Freijo Alvarez, Modesto; Edo Tomas, Joaquin Jesus; Rossell Garriga, Josep Maria
    International Conference on Occupational Risk Prevention
    Presentation's date: 2010-05-06
    Presentation of work at congresses

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  • A contribution to the contractibility problem for overlapping controllers

     Rossell Garriga, Josep Maria; Palacios Quiñonero, Francisco; Luo Ren, Ningsu
    IFAC Symposium on Large Scale Systems Theory and Applications
    Presentation's date: 2010-07-11
    Presentation of work at congresses

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    In this work, a contribution to the contractibility of decentralized control laws, in the context of the Inclusion Principle, is offered. By means of this principle, an overlapping system can be expanded to another bigger one where the subsystems are considered as disjoint. Under a control criterion, local controllers are designed for each subsystem. After this expansion-design process, the decentralized control laws need to be contracted and implemented in the original system. However, the contractibility conditions are not satisfied by arbitrary local gain matrices. In this paper, an explicit structure for the local gain matrices ensuring contractibility is presented; moreover, the possibility of using different control criteria in accordance with these structures is discussed.

  • Semi-decentralized output feedback H-infinity control strategy for large building structures

     Rossell Garriga, Josep Maria; Palacios Quiñonero, Francisco; Rodellar Benede, Jose Julian
    World Conference on Structural Control
    Presentation's date: 2010-07-12
    Presentation of work at congresses

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  • Aerogeneradors marins: una energia neta, renovable i sostenible  Open access

     Rossell Garriga, Josep Maria; Palacios Quiñonero, Francisco; Rubió Massegú, Josep
    Jornada de Sostenibilitat i Compromís Social
    Presentation's date: 2010-12-02
    Presentation of work at congresses

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  • Engineering structures

     Rossell Garriga, Josep Maria
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  • Mathematical reviews

     Rossell Garriga, Josep Maria
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  • Análisis de la siniestralidad del sector minero de Catalunya y España

     Sanmiquel Pera, Lluis
    Defense's date: 2010-01-13
    Department of Mining Engineering and Natural Resources, Universitat Politècnica de Catalunya
    Theses

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