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  • On the consistency of hysteresis models

     Fuad Mohammad naser, Mohammad
    Defense's date: 2014-01-30
    Universitat Politècnica de Catalunya
    Theses

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    La histéresis es un fenómeno nolineal encontrado en varios procesos como biología, óptica, electrónica, ferroelectricidad, magnetismo, mecánica, estructuras, así como en otras áreas. Una de las características de los sistemas con histéresis es la propiedad de consistencia formalizada en [52]. La clase de operadores considerados en [52] consiste en aquellos que son causales, con la condición adicional que a una entrada constante corresponda una salida constante. Para esta clase d sistemas, la consitencia ha sido definida formalmente. Esta propiedad es útil en modelado e identificación dado que limita la búsqueda de parámetros a aquellas regiones donde la consistencia es válida. *Esta tesis aplica los conceptos introducidos en [52] a algunos modelos de histéresis, más precisamente al modelo de LuGre y al modelo de Duhem. El objetivo de esta tesis es encontrar condiciones necesarias y condiciones suficientes para que se satisfaga la consistencia (o/y la consitencia fuerte). *Para el modelo de LuGre, la consistencia ¿fuerte- se estudia en el capítulo 2 bajo condiciones mínimas. Como resultado de este estudio, se hallan fórmulas explícitas del lazo de histéresis. Tales fórmulas podrían ser de utilidad para tareas de identificación como se demuestra en [53]. * El capítulo 3 de la tesis presenta una clasificación de los modelos de Duhem posibles en términos de su consistencia. Este estudio muestra que hay un parámetro ¿ que tiene que valer uno para que el modelo sea compatible con un comportamiento histerético.

  • Characterization of hysteresis processes

     Ikhouane, Fayçal
    Mathematics of control signals and systems
    Date of publication: 2013-09-01
    Journal article

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  • Identification of hammerstein-wiener systems including backlash input nonlinearities

     Giri, F.; Brouri, Adil; Ikhouane, Fayçal; Chaoui, Fatima Zahra; radouane, Abdelhadi
    Adaptation and Learning in Control and Signal Processing
    Presentation's date: 2013-06
    Presentation of work at congresses

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    Standard Hammerstein-Wiener models consist of a linear subsystem sandwiched by two memoryless nonlinearities. Presently, the input nonlinearity is allowed to be a memory operator of backlash type and both input and output nonlinearities are polynomial and may be noninvertible. The linear subsystem may be parametric or not, continuous- or discrete-time. A two-stage identification method is developed such the parameters of all nonlinear elements are estimated first using the Kozen- Landau polynomial decomposition algorithm. The obtained estimates are then based upon in the identification of the linear subsystem, making use of suitable pre- ad post-compensators.

  • Characterization of the hysteresis Duhem model

     Fuad, Mohammad; Ikhouane, Fayçal
    IFAC International Workshop on Periodic Control Systems
    Presentation's date: 2013-07-03
    Presentation of work at congresses

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  • Advances on LuGre friction model

     Fuad, Mohammad; Ikhouane, Fayçal
    The World Academy of Science, Engineering and Technology
    Presentation of work at congresses

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  • Robust control design for mechanisms with backlash

     Acho Zuppa, Leonardo; Ikhouane, Fayçal; Pujol Vazquez, Gisela
    Journal of Control Engineering and Technology
    Date of publication: 2013-10
    Journal article

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  • Consistency of the duhem model with hysteresis

     Fuad Mohammad Naser, Mohammad; Ikhouane, Fayçal
    Mathematical problems in engineering
    Date of publication: 2013
    Journal article

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    The Duhem model, widely used in structural, electrical, and mechanical engineering, gives an analytical description of a smooth hysteretic behavior. In practice, the Duhem model is mostly used within the following black-box approach: given a set of experimental input-output data, how to tune the model so that its output matches the experimental data. It may happen that a Duhem model presents a good match with the experimental real data for a specific input but does not necessarily keep significant physical properties which are inherent to the real data, independent of the exciting input. This paper presents a characterization of different classes of Duhem models in terms of their consistency with the hysteresis behavior. © 2013 Mohammad Fuad Mohammad Naser and Fayçal Ikhouane.

  • A unified approach for the identification of SISO/MIMO Wiener and Hammerstein systems

     Ikhouane, Fayçal; Giri, F.
    IFAC Symposium on System Identification
    Presentation's date: 2012-07-11
    Presentation of work at congresses

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  • A characterization of hysteresis systems

     Ikhouane, Fayçal
    Portuguese Conference on Automatic Control
    Presentation's date: 2012-07-16
    Presentation of work at congresses

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    Hysteresis is a nonlinear phenomenon exhibited by systems stemming from various science and engineering areas. To detect experimentally the presence of hysteresis in a system, the graph output versus input of the system is plotted for different frequencies of the input. For hysteresis systems, these graphs converge to a quasi-static limit set when the frequency goes to zero. Moreover, the quasi-static graph approaches asymptotically a periodic orbit. Thus, hysteresis is nonlinear phenomenon that can be detected only in the quasi-static regime, that is when the frequency content of the input goes to zero. The relevance of hysteresis in applications and the fact that it is essentially a quasi-static phenomenon makes it important to characterize mathematically the quasi-static regime, which is the purpose of this paper. Although this work is motivated by hysteresis systems, the tools that are presented are not limited to this class of systems. For this reason, the systems that we consider are seen as operators that map an input signal and initial condition to an output signal, all of them belonging to some specified sets. The main result of this paper is a new criterion for the existence, uniqueness and mathematical characterization of the quasi-static regime.

  • Frequency identification of Wiener systems with Backlash operators using separable least squares estimators

     Giri, F.; Rochdi, Y.; Ikhouane, Fayçal; Brouri, A; Chaoui, F.Z
    IFAC Symposium on System Identification
    Presentation's date: 2012-07-11
    Presentation of work at congresses

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  • Parametric identification of the Dahl model for large scale MR dampers

     Aguirre Carvajal, Naile; Ikhouane, Fayçal; Rodellar Benede, Jose Julian; Christenson, R.
    Structural control & health monitoring
    Date of publication: 2012-04
    Journal article

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  • MAGNETORHEOLOGICAL DAMPERS: MODELING AND CONTROL DESIGN FOR CIVIL ENGINEERING STRUCTURES

     Aguirre Carvajal, Naile
    Defense's date: 2012-02-03
    Department of Geotechnical Engineering and Geo-Sciences, Universitat Politècnica de Catalunya
    Theses

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  • Análisis e identificación de sistemas con histéresis usando órbitas periódicas

     Pujol Vazquez, Gisela; Mañosa Fernández, Víctor; Giri, F.; Fuad, Mohammad; Ikhouane, Fayçal
    Participation in a competitive project

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  • Seismic protection of low- to moderate-mass buildings using RNC isolator

     Ismail Abdelkareem Moustafa, Mohammed; Rodellar Benede, Jose Julian; Ikhouane, Fayçal
    Structural control & health monitoring
    Date of publication: 2012-02
    Journal article

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  • A general framework for the analysis of the quasi-static regime

     Ikhouane, Fayçal
    World Congress of the International Federation of Automatic Control
    Presentation's date: 2011-08-30
    Presentation of work at congresses

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  • Proportional-plus-integral semiactive control using magnetorheological dampers

     Aguirre Carvajal, Naile; Ikhouane, Fayçal; Rodellar Benede, Jose Julian
    Journal of sound and vibration
    Date of publication: 2011-05-09
    Journal article

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  • Access to the full text
    PI semiactive control using MR dampers  Open access

     Aguirre Carvajal, Naile; Ikhouane, Fayçal; Rodellar Benede, Jose Julian
    International Conference on Motion and Vibration Control
    Presentation's date: 2010-08-18
    Presentation of work at congresses

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    Magnetorheological (MR) dampers are a promising alternative structural active actuators as they provide adjustable damping over a wide range of frequencies without large power requirements. However, the complex dynamics that characterizes these devices makes it difficult to formulate control laws based on the MR damper model. Instead, many semiactive control strategies proposed in the literature have been based on the idea of ”clipping” the voltage signal so that the MR damper force ”tracks” a desired active control force which is computed on-line. With this idea many algorithms have been proposed using, among others, techniques such as optimal control, H∞ control,sliding mode control, backstepping and QFT. This work presents a semiactive control strategy based on the same idea of ”clipping” the voltage signal but using a simpler PI design. The proportional and integral gains of the controller are calculated so that the controller guarantees stability, minimization of the closed loop response and robustness against modeling errors. Effectiveness of the control strategy is compared to some others techniques and passive cases as well. Simulation results shows that this simple strategy can effectively improve the structural responses and achieve performance index comparable to that of more complex algorithms.

  • On the analysis of the quasi-static regime

     Ikhouane, Fayçal
    Adaptation and Learning in Control and Signal Processing
    Presentation's date: 2010-08-27
    Presentation of work at congresses

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  • An Input/Output approach for the analysis of the quasi-static regime

     Ikhouane, Fayçal
    Chinese Control and Decision Conference
    Presentation's date: 2010-05-26
    Presentation of work at congresses

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  • An operational approach for the analysis of the quasi-static regime

     Ikhouane, Fayçal
    Emerging Topics in Dynamical Systems and Partial Differential Equations
    Presentation's date: 2010-06-04
    Presentation of work at congresses

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  • Viscous + Dahl model for MR damper characterization: A real-time hybrid test (RTHT) validation

     Aguirre Carvajal, Naile; Ikhouane, Fayçal; Rodellar Benede, Jose Julian; Wagg, David; Neild, Simon
    European Conference on Earthquake Engineering
    Presentation's date: 2010-09-03
    Presentation of work at congresses

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  • Modeling and identification of a small scale magnetorheological damper

     Aguirre Carvajal, Naile; Ikhouane, Fayçal; Rodellar Benede, Jose Julian; Wagg, David; Neild, Simon
    Adaptation and Learning in Control and Signal Processing
    Presentation's date: 2010-08-26
    Presentation of work at congresses

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  • An innovative isolation device for aseismic design

     Ismail Abdelkareem Moustafa, Mohammed; Rodellar Benede, Jose Julian; Ikhouane, Fayçal
    Engineering structures
    Date of publication: 2010-04
    Journal article

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  • Model identification of a large-scale magnetorheological fluid damper

     Rodrígez, Arturo; Iwata, N; Ikhouane, Fayçal; Rodellar Benede, Jose Julian
    Smart materials and structures
    Date of publication: 2009-01
    Journal article

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  • The Hysteresis Bouc-Wen Model, a Survey

     Ismail, M; Ikhouane, Fayçal; Rodellar Benede, Jose Julian
    Archives of computational methods in engineering
    Date of publication: 2009-06
    Journal article

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  • Control of a piezoelectric actuator considering hysteresis

     Gomis Bellmunt, Oriol; Ikhouane, Fayçal; Montesinos Miracle, Daniel
    Journal of sound and vibration
    Date of publication: 2009-10
    Journal article

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  • An innovative isolation bearing for motion-sensitive equipment

     Ismail, M; Rodellar Benede, Jose Julian; Ikhouane, Fayçal
    Journal of sound and vibration
    Date of publication: 2009-10
    Journal article

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  • Modeling and identification of a small-scale Magnetorheological damper

     Rodríguez Tsouroukdissian, Arturo; Ikhouane, Fayçal; Rodellar Benede, Jose Julian; Luo Ren, Ningsu
    Journal of intelligent material systems and structures
    Date of publication: 2009-05-01
    Journal article

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  • H8 control design for mechanisms with backlash

     Pujol Vazquez, Gisela; Ikhouane, Fayçal; Acho Zuppa, Leonardo
    IASTED International Conference Control and Applications
    Presentation's date: 2009
    Presentation of work at congresses

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    An H∞ output feedback control design is presented for mechanisms with backlash, under the presence of external perturbation. Using the static dead-zone model as a simpler model for backlash, the non-linear problem is cast in linear H∞ framework, seeing the backlash effect as a bounded disturbance in the extended L2 space (L2e). Experimental realization in an industrial emulator with backlash is carried out, evidencing an acceptable performance of the controller subject to external perturbation.

  • Control of a piezoelectric hysteretic actuator

     Gomis Bellmunt, Oriol; Ikhouane, Fayçal; Montesinos Miracle, Daniel; Galceran Arellano, Samuel; Rull Duran, Joan
    European Conference on Power Electronics and Applications
    Presentation's date: 2009-09-08
    Presentation of work at congresses

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  • Performance of structure-equipment systems with a novel roll-n-cage isolation bearing

     Ismail Abdelkareem Moustafa, Mohammed; Rodellar Benede, Jose Julian; Ikhouane, Fayçal
    Computers & structures
    Date of publication: 2009-12
    Journal article

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    In this the paper, the problem of mitigating the seismic response of sensitive equipments housed in building structures is addressed by isolating the structure with an innovative device referred to as roll-n-cage isolator. The device is described, characterized and represented by a hysteretic semi-physical mathematical model. A numerical performance assessment is performed by implementing the isolator in a building structure housing equipment in upper floors where accelerations are amplified and motions contain strong components at long periods. The numerical results show that the proposed isolator is efficient in substantially attenuating the structure–equipment response under a wide variety of actual earthquakes while exhibiting robust performance for a wide range of structures.

  • An innovative isolation device for aseismic design  Open access  awarded activity

     Ismail Abdelkareem Moustafa, Mohammed
    Defense's date: 2009-11-09
    Department of Geotechnical Engineering and Geo-Sciences, Universitat Politècnica de Catalunya
    Theses

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    Basado en la idea de reducir la demanda sísmica en lugar de aumentar la capacidad resistente de las estructuras, el aislamiento sísmico es un método simple para mitigar o reducir los posibles daños producidos por los terremotos. La correcta aplicación de esta tecnología conduce a un mejor comportamiento de las estructuras, que sigue siendo esencialmente elástico durante los terremotos de gran magnitud. El núcleo de esta tecnología es el aislador. La mayoría de los aisladores sísmicos disponibles en la actualidad siguen teniendo limitaciones prácticas que impiden que funcionen según lo previsto e imponen restricciones a su uso efectivo y al nivel de protección proporcionado. En esta Tesis, se presenta un aislador sísmico avanzado llamado "roll-n-cage (RNC)". Se propone investigar su eficiencia a través de simulación numérica, en un intento de crear un sistema de aislamiento sísmico práctico, efectivo y económico, que tiene por objeto resolver los principales inconvenientes de los actuales sistemas de aislamiento sísmico, manteniendo sus principales ventajas. Este aislador incorpora aislamiento, disipación de energía, amortiguamiento y capacidad de fuerza recuperadora en una sola unidad. Además, ofrece una resistencia al viento significativa y una amplia gama de flexibilidad horizontal, por lo que es adecuado para proteger las estructuras de masa ligera, moderada y grande, así como para proteger equipos sensibles, hardware y / o antigüedades alojados en edificios. Por otra parte, las cuestiones relativas a la viabilidad, los costes de construcción y la disponibilidad de materiales, reducción o prevención de las respuestas de torsión y la resistencia a la elevación son abordados a fondo durante el diseño del aislador RNC. El aislador RNC propuesto es descrito en profundidad y sus principios de funcionamiento son presentados en detalle. La caracterización mecánica del dispositivo se ha llevado a cabo por medio de un código computacional sofisticado que simula la respuesta de los dispositivos como si estuvieran sujetos a una máquina de pruebas reales. A través de este esquema, se consigue analizar numéricamente el comportamiento del aislador RNC bajo el efecto simultáneo de cargas horizontales y verticales, como se da típicamente en situaciones prácticas. Además, se presenta una descripción matemática de las principales características asociadas a la rodadura de los aisladores RNC. Asimismo se obtiene un modelo matemático para describir en una forma razonable y manejable la relación fuerza desplazamiento exhibida por el aislador de RNC. Para evaluar la viabilidad del aislador RNC y para comprobar su capacidad para proteger los sistemas estructurales y no estructurales de los riesgos sísmicos, el dispositivo se implementa numéricamente en una variedad de estructuras con masas ligeras y grandes, además de en equipos sensibles alojados en los pisos superiores de dichas estructuras. Para extraer conclusiones de carácter relativamente general sobre el funcionamiento del aislador RNC, se estudia una amplia gama de terremotos y de características y propiedades de los aisladores y de las estructuras.Los resultados numéricos revelan que el aislador RNC propuesto puede reducir la respuesta sísmica frente a un amplio rango de excitaciones sísmicas, mientras que exhibe un rendimiento robusto para una gran variedad de estructuras. La Tesis incluye como apéndice un estudio en profundidad sobre el modelo de histéresis de Bouc-Wen. El estudio contiene una revisión de los primeros y últimos avances y aplicaciones de este modelo, que es ampliamente utilizado en la descripción de fenómenos de histéresis en las estructuras.

    Based on the concept of reducing seismic demand rather than increasing the earthquake resistant capacity of structures, seismic isolation is a surprisingly simple approach to mitigate or reduce earthquake damage potential. Proper application of this complex technology leads to better performing structures that will remain essentially elastic during large earthquakes. The core of this technology is the isolator. Most currently available seismic isolators still have practical limitations causing them not to function as anticipated and impose restrictions to their proper use and to the provided protection level. In this dissertation, an advanced rolling-based seismic isolator, named roll-n-cage (RNC) isolator, is proposed and investigated via numerical simulation as an attempt to create a practical, effective, and economic seismic isolation system that aims to fix the main drawbacks of the current seismic isolation systems while keeping their main advantages. This isolator incorporates isolation, energy dissipation, buffer and restoring force mechanisms in a single unit. Further, it offers a significant wind resistance and a great range of horizontal flexibility making it ideal to protect light, moderate and heavy mass structures as well as precious housed motion-sensitive equipment, hardware and/or antiquities. Moreover, issues related to practicality, construction costs and material availability, reducing or preventing torsional responses and uplift resistance are thoroughly addressed during the RNC bearing design.The proposed RNC isolator is deeply described and its principles of operation are extensively highlighted. The mechanical characterization of the device has been carried out by means of a sophisticated computer code in a machine-like environment, which accurately simulates the response of the device subjected to a real testing machine. Through this machine-like environment, a general scheme is followed to numerically examine the behavior of the RNC isolator under simultaneous horizontal and vertical loads as in typical practical situations. Further, a mathematical description of the main features associated to rolling of the RNC isolator is presented. An input-output mathematical model is obtained to describe in a reasonable and manageable form the force-displacement relationship exhibited by the RNC isolator.To assess the feasibility of the RNC isolator and to check its ability to protect structural and nonstructural systems from seismic hazards, it is numerically implemented to a variety of structures having light to heavy masses, in addition to motion-sensitive equipment housed in upper building floors. Further, and to draw relatively general conclusions about the performance of the RNC isolator, a wide range of ground motions, isolator characteristics and structural properties is considered. The numerical results reveal that the proposed RNC isolation bearing can mitigate the seismic responses under a variety of ground motion excitations while exhibiting robust performance for a wide range of structures. The dissertation is appended with an in-depth survey, that contains a review of the past, recent developments and implementations of the versatile Bouc-Wen model of smooth hysteresis, which is used extensively in modeling the hysteresis phenomenon in the dynamically excited nonlinear structures. This survey is the first of its kind about the model since its origination more than 30 years ago. The objective is to present some of the popular approaches that have utilized and/or developed that model to capture the hysteretic behavior offered by a variety of nonlinear systems. Then, the evaluation of their results and contributions (if any) is carried out to highlight their assets and limitations and to identify future directions in this research area.

  • Modeling and identification of magnetorheological (MR) dampers for civil engineering structures

     Rodriguez Tsouroukdissian, Arturo
    Defense's date: 2009-10-19
    Department of Geotechnical Engineering and Geo-Sciences, Universitat Politècnica de Catalunya
    Theses

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  • Control, dinàmica i aplicacions (CODALAB)

     Mantecon Baena, Juan Antonio; Galvis Restrepo, Eduard; Ikhouane, Fayçal; Rubió Massegú, Josep; Vidal Segui, Yolanda; Rossell Garriga, Josep Maria; Palacios Quiñonero, Francisco; Pujol Vazquez, Gisela; Pozo Montero, Francesc; Mañosa Fernández, Víctor; Tibaduiza Burgos, Diego Alexander; Mujica Delgado, Luis Eduardo; Acho Zuppa, Leonardo; Gharibnezhad, Fahit; Ismail Abdelkareem Moustafa, Mohammed; Rodellar Benede, Jose Julian
    Participation in a competitive project

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  • CONTROL DE SISTEMAS CON ACTUADORES NO LINEALES: EL CASO DE LA HISTREREIS, LA FRICCIÓN Y LA HOLGURA DINÁMICA

     Pozo Montero, Francesc; Pujol Vazquez, Gisela; Acho Zuppa, Leonardo; Ikhouane, Fayçal
    Participation in a competitive project

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  • Parametric identification of nonlinear hysteretic systems

     Rochdi, Y.; Giri, F.; Ikhouane, Fayçal; Chaoui, F.Z; Rodellar Benede, Jose Julian
    Nonlinear dynamics
    Date of publication: 2009-10
    Journal article

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  • Author's reply

     Ikhouane, Fayçal; Gomis Bellmunt, Oriol
    Systems & control letters
    Date of publication: 2009-11
    Journal article

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  • Numerical issues in backstepping control: sensitivity and parameter tuning

     Pozo Montero, Francesc; Ikhouane, Fayçal; Rodellar Benede, Jose Julian
    Journal of the Franklin Institute
    Date of publication: 2008-01
    Journal article

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  • Modelling and identification of a large-scale magnetorheological fluid damper

     Rodriguez, A; Iwata, N; Ikhouane, Fayçal; Rodellar Benede, Jose Julian
    Advances in science and technology
    Date of publication: 2008-09
    Journal article

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  • Discussion of "Generalized Bouc-Wen model for highly asymmetric hysteresis"

     Ikhouane, Fayçal; Pozo Montero, Francesc; Acho Zuppa, Leonardo
    Journal of engineering mechanics
    Date of publication: 2008-05
    Journal article

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  • A limit cycle approach for the parametric identification of hysteretic systems

     Ikhouane, Fayçal; Gomis Bellmunt, Oriol
    Systems & control letters
    Date of publication: 2008-08
    Journal article

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  • The art of control algorithms design and implementation

     Rodellar Benede, Jose Julian; Ikhouane, Fayçal; Pozo Montero, Francesc; Pujol Vazquez, Gisela; Acho Zuppa, Leonardo; Rossell Garriga, Josep Maria
    Advances in science and technology
    Date of publication: 2008-09
    Journal article

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  • Robust-adaptive control and observer design for mechanical systems with friction

     Iurian, Claudiu
    Defense's date: 2008-01-31
    Institute of Industrial and Control Engineering (IOC), Universitat Politècnica de Catalunya
    Theses

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  • Identification of a magnetorheological damper: Theory and experiments

     Rodriguez Ferran, Antonio; Ikhouane, Fayçal; Rodellar Benede, Jose Julian; Luo Ren, Ningsu
    World Congress of the International Federation of Automatic Control
    Presentation of work at congresses

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  • Cálculo avanzado para ingeniería: teoría, problemas resueltos y aplicaciones

     Arias Vicente, Irene; Gibergans Báguena, José; Ikhouane, Fayçal; Parés Mariné, Núria; Pozo Montero, Francesc; Pujol Vazquez, Gisela; Vidal Segui, Yolanda
    Date of publication: 2008-02
    Book

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  • Modeling, identification, and semi-active control of a large-scale magnetorheological fluid damper

     Rodriguez Ferran, Antonio; Iwata, N; Ikhouane, Fayçal; Rodellar Benede, Jose Julian
    Third International Conference Smart Materials, Structures and Systems
    Presentation of work at congresses

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  • Control of Bouc-Wen hysteretic systems: Application to a piezoelectric actuator

     Gomis Bellmunt, Oriol; Ikhouane, Fayçal; Montesinos Miracle, Daniel
    International Power Electronics and Motion Control Conference
    Presentation's date: 2008-09-01
    Presentation of work at congresses

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  • A new isolation approach for equipement protection

     Ismail, M; Rodellar Benede, Jose Julian; Ikhouane, Fayçal
    4th European Conference on Structural Control
    Presentation of work at congresses

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  • Parametric Identification of Nonlinear Hysteretic systems

     Rochdi, Y; Giri, F; Chaoui, F; Ikhouane, Fayçal; Rodellar Benede, Jose Julian
    World Congress of the International Federation of Automatic Control
    Presentation of work at congresses

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