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Partager le résultat de cette recherche Interroger des sources externesContrôle de la couche limite laminaire d’un écoulement stationnaire, visqueux, compressible et subsonique autour d’un profil bidimensionnel / Azzeddine Nahoui
Titre : Contrôle de la couche limite laminaire d’un écoulement stationnaire, visqueux, compressible et subsonique autour d’un profil bidimensionnel Type de document : texte imprimé Auteurs : Azzeddine Nahoui, Auteur ; Lakhdar Bahi, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 116 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Couche limite laminaire compressible nombre de Mach nombre de Reynolds contrôle point de séparation aspiration soufflage refroidissement pariétal Laminar boundary layer Mach number Reynolds number control separation point suction blowing wall cooling ???? ???? ??????? ??????? ??? ??? ??? ??????? ?????? ???? ???????? ???????? ????? ???????? ?????? Index. décimale : 530 Physique Résumé : A numerical study of a laminar boundary layer of a stationary, viscous, compressible and subsonic flow around a two-dimensional NACA profile was conducted without and with control.
The flow domain has been divided into two zones, one near-wall, the boundary layer, which is responsible for friction phenomena, and the other, an external zone where flow is considered potential.
The potential flow is studied by the panel method for the determination of the external velocity distribution necessary for the treatment of the boundary layer.
The boundary layer was studied using the PRANDTL model and the KELLER method by reducing the order of the first-order differential equations, the writing of the algebraic equations, and the linearization by the Newton method via an iterative calculation process and finally the resolution by the method of elimination by blocks.
The distributions of the pressure and lift coefficients were determined and examined for different Mach numbers and different angles of attack with varying relative thickness.
Thermal control by wall heating or wall cooling was studied and the results demonstrated only the effectiveness of the wall cooling control on the recoil of the separation point around 10% of the chord of the profile.
The dynamic control by suction or blowing has demonstrated its effectiveness on the decline of the separation point; the decline has reached 10% of the chord of the profile.
The superimposition of the thermal and dynamic control procedures demonstrated once again more efficiency on the retreat of the boundary layer separation point with a gain of 15% of the chord of the profile.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/NAH7251.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10843 Contrôle de la couche limite laminaire d’un écoulement stationnaire, visqueux, compressible et subsonique autour d’un profil bidimensionnel [texte imprimé] / Azzeddine Nahoui, Auteur ; Lakhdar Bahi, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2018 . - 116 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Couche limite laminaire compressible nombre de Mach nombre de Reynolds contrôle point de séparation aspiration soufflage refroidissement pariétal Laminar boundary layer Mach number Reynolds number control separation point suction blowing wall cooling ???? ???? ??????? ??????? ??? ??? ??? ??????? ?????? ???? ???????? ???????? ????? ???????? ?????? Index. décimale : 530 Physique Résumé : A numerical study of a laminar boundary layer of a stationary, viscous, compressible and subsonic flow around a two-dimensional NACA profile was conducted without and with control.
The flow domain has been divided into two zones, one near-wall, the boundary layer, which is responsible for friction phenomena, and the other, an external zone where flow is considered potential.
The potential flow is studied by the panel method for the determination of the external velocity distribution necessary for the treatment of the boundary layer.
The boundary layer was studied using the PRANDTL model and the KELLER method by reducing the order of the first-order differential equations, the writing of the algebraic equations, and the linearization by the Newton method via an iterative calculation process and finally the resolution by the method of elimination by blocks.
The distributions of the pressure and lift coefficients were determined and examined for different Mach numbers and different angles of attack with varying relative thickness.
Thermal control by wall heating or wall cooling was studied and the results demonstrated only the effectiveness of the wall cooling control on the recoil of the separation point around 10% of the chord of the profile.
The dynamic control by suction or blowing has demonstrated its effectiveness on the decline of the separation point; the decline has reached 10% of the chord of the profile.
The superimposition of the thermal and dynamic control procedures demonstrated once again more efficiency on the retreat of the boundary layer separation point with a gain of 15% of the chord of the profile.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/NAH7251.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10843 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité NAH/7251 NAH/7251 Thèse Bibliothèque principale Thèses Disponible
Titre : النظام القانوني للرقابة المصرفیة في الجزائر Type de document : texte imprimé Auteurs : إیمان رتیبة شویطر, Auteur ; عبد المجيد قموح, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 415 ورقة. Format : 30 سم. Note générale : 2نسخ موجودة مكتبة المركزية
Langues : Arabe (ara) Catégories : Arabe
القانونTags : ??????? ??????? ???????? ??? ?????? ??????? control banking institution regulationof banking activity contrôle institution bancaire-régulation de l'activité bancaire Index. décimale : 340 القانون Résumé : It is incontestable that the banking institution is considered to be
the fundamental source of funding and reinforcement of the national
economy.
Consequently, and in order to preserve it, it is crucial to submit the
banking institution to an efficient judicial and regulatory regime. The
major objective of this regime would be to determine the ways and
means which enable a number of banks to continue and activate
effectively in their field.
In this perspective, it is vital to exert a rigorous inspection over banks
to preserve them from the numerous and diverse risks that threaten them
on a daily basis; and which represent a menace not only to their
existence, but a major peril to the stability and reliability of the entire
banking system and which in turn would affect the political and economic
aspects negatively.
Diplôme : Doctorat en sciences En ligne : ../theses/droit/ACHO4195.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10679 النظام القانوني للرقابة المصرفیة في الجزائر [texte imprimé] / إیمان رتیبة شویطر, Auteur ; عبد المجيد قموح, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2017 . - 415 ورقة. ; 30 سم.
2نسخ موجودة مكتبة المركزية
Langues : Arabe (ara)
Catégories : Arabe
القانونTags : ??????? ??????? ???????? ??? ?????? ??????? control banking institution regulationof banking activity contrôle institution bancaire-régulation de l'activité bancaire Index. décimale : 340 القانون Résumé : It is incontestable that the banking institution is considered to be
the fundamental source of funding and reinforcement of the national
economy.
Consequently, and in order to preserve it, it is crucial to submit the
banking institution to an efficient judicial and regulatory regime. The
major objective of this regime would be to determine the ways and
means which enable a number of banks to continue and activate
effectively in their field.
In this perspective, it is vital to exert a rigorous inspection over banks
to preserve them from the numerous and diverse risks that threaten them
on a daily basis; and which represent a menace not only to their
existence, but a major peril to the stability and reliability of the entire
banking system and which in turn would affect the political and economic
aspects negatively.
Diplôme : Doctorat en sciences En ligne : ../theses/droit/ACHO4195.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10679 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité شوي/4195 شوي/4195 Thèse Bibliothèque principale Thèses Disponible
Titre : Architectures intégrées de gestion de l'énergie pour les multisystèmes autonomes utilisant le stockage par accumulateurs. Type de document : texte imprimé Auteurs : Bouthaina Madaci, Auteur ; Rachid Chenni, Directeur de thèse ; Kamel Eddine Hemsas, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 114 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Electro-techniqueTags : système d?énergie hybride photovoltaïque éolien pile à combustible système de stockage gestion d?énergie commande simulation MPPT hybrid power system photovoltaic wind fuel cell storage system power management control ???? ?????? ??????? ??????? ???????(PV) ?????? ????? ?????? PEM ???????? ????? ?????? Index. décimale : 622 Electro-Technique Résumé : Because of the global growth in energy demand, and because of the problems posed by fossil fuels, t : he depletion of these resources and the environmental problems caused
by the emission of gases, renewable energy sources (photovoltaic, wind ...) represent an interesting alternative for the electrification of isolated sites. However, these
sources have a disadvantage of being dependent on weather conditions. In order to reduce fluctuations in production caused by the random nature of these resources and to
satisfy the requirements of the load the solution to be retained is the assembly of the different sources of electric power generation.
This work is a contribution to the study of an autonomous hybrid energy system, which consists of systems: photovoltaic (PV), wind, PEM fuel cell and a storage system on
several aspects: modeling, supervision and simulation. Energy storage is a key factor in an isolated site hybrid energy system. However, it is characterized by a very limited
lifespan and high cost. In order to avoid its degradation by deep discharges or overloads on the one hand and on the other hand to optimally manage the energy obtained
from the various available energy resources, a management strategy based on The state of charge of the battery (SOC) is designed to control the proposed autonomous
multi-source system. Where PV and wind systems are considered primary sources, while the PEMFC and the battery are used as emergency sources, the electrolysis is used
to consume the excess power available when the battery is fully charged.
The modeling and simulation of the PV and wind systems were presented with an MPPT command to maximize the power delivered. To maintain the DC bus voltage at its
reference value, a modified control algorithm is proposed which requires the control of the bidirectional converter to DC / DC current between the battery and the DC bus.
The results obtained with the Matlab / Simulink software show the efficiency of the various commands used.
Diplôme : Doctorat En ligne : ../theses/electrotec/MAD7231.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10801 Architectures intégrées de gestion de l'énergie pour les multisystèmes autonomes utilisant le stockage par accumulateurs. [texte imprimé] / Bouthaina Madaci, Auteur ; Rachid Chenni, Directeur de thèse ; Kamel Eddine Hemsas, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2018 . - 114 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Electro-techniqueTags : système d?énergie hybride photovoltaïque éolien pile à combustible système de stockage gestion d?énergie commande simulation MPPT hybrid power system photovoltaic wind fuel cell storage system power management control ???? ?????? ??????? ??????? ???????(PV) ?????? ????? ?????? PEM ???????? ????? ?????? Index. décimale : 622 Electro-Technique Résumé : Because of the global growth in energy demand, and because of the problems posed by fossil fuels, t : he depletion of these resources and the environmental problems caused
by the emission of gases, renewable energy sources (photovoltaic, wind ...) represent an interesting alternative for the electrification of isolated sites. However, these
sources have a disadvantage of being dependent on weather conditions. In order to reduce fluctuations in production caused by the random nature of these resources and to
satisfy the requirements of the load the solution to be retained is the assembly of the different sources of electric power generation.
This work is a contribution to the study of an autonomous hybrid energy system, which consists of systems: photovoltaic (PV), wind, PEM fuel cell and a storage system on
several aspects: modeling, supervision and simulation. Energy storage is a key factor in an isolated site hybrid energy system. However, it is characterized by a very limited
lifespan and high cost. In order to avoid its degradation by deep discharges or overloads on the one hand and on the other hand to optimally manage the energy obtained
from the various available energy resources, a management strategy based on The state of charge of the battery (SOC) is designed to control the proposed autonomous
multi-source system. Where PV and wind systems are considered primary sources, while the PEMFC and the battery are used as emergency sources, the electrolysis is used
to consume the excess power available when the battery is fully charged.
The modeling and simulation of the PV and wind systems were presented with an MPPT command to maximize the power delivered. To maintain the DC bus voltage at its
reference value, a modified control algorithm is proposed which requires the control of the bidirectional converter to DC / DC current between the battery and the DC bus.
The results obtained with the Matlab / Simulink software show the efficiency of the various commands used.
Diplôme : Doctorat En ligne : ../theses/electrotec/MAD7231.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10801 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MAD/7231 MAD/7231 Thèse Bibliothèque principale Thèses Disponible
Titre : Contribution a l’etude dynamique des robots paralleles hybrides Type de document : texte imprimé Auteurs : Abdelhakim Chibani, Auteur Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2016 Importance : 151 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie MécaniqueTags : Robot Parallèle Hybride Manipulateur Hyper-Redondant Optimisation Non Linéaire Modé-lisation Dynamique Commande Hybrid Parallel Robot Hyper-redundant Manipulator Non Linear Optimization Dynamic Modeling Control ????? ???? ????? ??????? ????? ??????? ??????????? ?????? Index. décimale : 620 Génie Mécanique Résumé : The work presented in this thesis concerns the dynamic modeling of hybrid parallel robots. This work helps
to solve one of the real problems of research on hybrid parallel robots that is to nd a compromise between a
high dynamic and a high redundancy. Through this, we present a general methodology for analysis and modeling of hybrid modular parallel robot manipulators following procedures and developed techniques for serial
robots, tree structured chain or closed loops chain. In geometric modeling, two approaches have been taken
to solve the inverse kinematics : the use of the generalized inverse Jacobian matrix of the manipulator, commonly called pseudo-inverse, and moreover, a non linear optimization problem not linear used. The proposed
model is original since it achieves a reasonable and satisfactory compromise between the data of the problem,
the mathematical model, the constraints imposed on the system, physical limitations and desired results. The
dynamics study is, rstly on dynamic modeling of parallel robots. For this we have used the Newton-Euler
algorithms for inverse and direct dynamic models.Secondly, from the models developed for the parallel robot,
we studied the dynamic modeling of hybrid parallel robots consisting of the concatenation of several parallel
modules. The algorithms developed are based on the use of recursive Newton-Euler formalism. The advantage
of this model is that it is generic enough to be applied to the modeling, simulation and control of several classes
of modular robots architecture. In addition to dynamic modeling, we studied the control aspect of hybrid parallel robots. The aim is to enable accurate prediction with the least possible calculations. Indeed, the inverse
dynamic model developed provides a simple and e ective tool for the development of an appropriate control
scheme. For this purpose, a control scheme by non-linear decoupling into the joint space was considered. In the
developed simulator, all joint variables reported by the optimization algorithm are used as guidelines to meet the
target of motion control. Algorithms have been developed and tested in simulation and the results are presented.
Diplôme : Doctorat en sciences En ligne : ../theses/gmecanique/CHI6971.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10369 Contribution a l’etude dynamique des robots paralleles hybrides [texte imprimé] / Abdelhakim Chibani, Auteur . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2016 . - 151 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie MécaniqueTags : Robot Parallèle Hybride Manipulateur Hyper-Redondant Optimisation Non Linéaire Modé-lisation Dynamique Commande Hybrid Parallel Robot Hyper-redundant Manipulator Non Linear Optimization Dynamic Modeling Control ????? ???? ????? ??????? ????? ??????? ??????????? ?????? Index. décimale : 620 Génie Mécanique Résumé : The work presented in this thesis concerns the dynamic modeling of hybrid parallel robots. This work helps
to solve one of the real problems of research on hybrid parallel robots that is to nd a compromise between a
high dynamic and a high redundancy. Through this, we present a general methodology for analysis and modeling of hybrid modular parallel robot manipulators following procedures and developed techniques for serial
robots, tree structured chain or closed loops chain. In geometric modeling, two approaches have been taken
to solve the inverse kinematics : the use of the generalized inverse Jacobian matrix of the manipulator, commonly called pseudo-inverse, and moreover, a non linear optimization problem not linear used. The proposed
model is original since it achieves a reasonable and satisfactory compromise between the data of the problem,
the mathematical model, the constraints imposed on the system, physical limitations and desired results. The
dynamics study is, rstly on dynamic modeling of parallel robots. For this we have used the Newton-Euler
algorithms for inverse and direct dynamic models.Secondly, from the models developed for the parallel robot,
we studied the dynamic modeling of hybrid parallel robots consisting of the concatenation of several parallel
modules. The algorithms developed are based on the use of recursive Newton-Euler formalism. The advantage
of this model is that it is generic enough to be applied to the modeling, simulation and control of several classes
of modular robots architecture. In addition to dynamic modeling, we studied the control aspect of hybrid parallel robots. The aim is to enable accurate prediction with the least possible calculations. Indeed, the inverse
dynamic model developed provides a simple and e ective tool for the development of an appropriate control
scheme. For this purpose, a control scheme by non-linear decoupling into the joint space was considered. In the
developed simulator, all joint variables reported by the optimization algorithm are used as guidelines to meet the
target of motion control. Algorithms have been developed and tested in simulation and the results are presented.
Diplôme : Doctorat en sciences En ligne : ../theses/gmecanique/CHI6971.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10369 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité CHI/6971 CHI/6971 Thèse Bibliothèque principale Thèses Disponible
Titre : Contribution a la modelisation dynamique d’un robot flexible bionique Type de document : texte imprimé Auteurs : Ammar Amouri, Auteur ; Abdelouahab Zaatri, Directeur de thèse ; Chawki Mahfoudi, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 132 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie MécaniqueTags : Multi-section flexible robots design geometric modeling methaheuristic methods dynamic
modeling control Robots flexibles multi-sections conception modélisation géométrique méthodes méthaheuristiques modélisation dynamique commande ????? ??? ????? ??????? ??????? ??????? ???????? ??? ????????? ??????? ??????????? ??????Index. décimale : 620 Génie Mécanique Résumé : This thesis deals with the design, geometric, kinematic and dynamic modeling of bionic
flexible robots. In particular, we are mainly interested in cable-driven flexible robots and a
bionic robot named ‘‘Compact Bionic Handling Assistant (CBHA)’’.
Initially, we have proposed two kind of design of flexible robots, including a planar robot
and a space robot, both powered by cables. Based on this study, we have undertaken the
construction of a prototype with a single flexible section. This design and realization have
also been used to estimate the inertial parameters that will be used in the dynamic models of
these prototypes. First, we have developed the mathematical formulations describing the
structure of the flexible robots which represents a general case of multi-section flexible
robots. Next, we have developed an approach for solving the problem of inverse geometric
modeling of multi-section flexible robots, assuming that each flexible section bends as a
circular arc while keeping the principal axis of the structure inextensible. The problem was
formulated mathematically in terms of optimization of a quadratic cost function under some
constraints of equality (lengths conservation). The problem has been solved by developing an
optimization algorithm including metaheuristic methods, namely the Particle Swarm
Optimization (PSO) and the Genetic Algorithm (GA). This approach was validated by
simulation and two experimental test benches performed on the CBHA robot. Then, we have
also proposed dynamic models, direct and inverse, for the two cable-driven flexible robots,
planar and spatial, using the Lagrange method. In order to simplify the calculations and avoid
some numerical singularities, the dynamic models were approximated by expansion of
Taylor's series. These models have been validated by simulations under the MATLAB
environment. In addition, the inverse dynamic model was validated by real measurements
obtained from the robot UR5. Finally, a proportional-integral-derivative controller (PID) has
been proposed to track trajectories using the point-to-point method.Diplôme : Doctorat en sciences En ligne : ../theses/gmecanique/AMO7101.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10500 Contribution a la modelisation dynamique d’un robot flexible bionique [texte imprimé] / Ammar Amouri, Auteur ; Abdelouahab Zaatri, Directeur de thèse ; Chawki Mahfoudi, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2017 . - 132 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie MécaniqueTags : Multi-section flexible robots design geometric modeling methaheuristic methods dynamic
modeling control Robots flexibles multi-sections conception modélisation géométrique méthodes méthaheuristiques modélisation dynamique commande ????? ??? ????? ??????? ??????? ??????? ???????? ??? ????????? ??????? ??????????? ??????Index. décimale : 620 Génie Mécanique Résumé : This thesis deals with the design, geometric, kinematic and dynamic modeling of bionic
flexible robots. In particular, we are mainly interested in cable-driven flexible robots and a
bionic robot named ‘‘Compact Bionic Handling Assistant (CBHA)’’.
Initially, we have proposed two kind of design of flexible robots, including a planar robot
and a space robot, both powered by cables. Based on this study, we have undertaken the
construction of a prototype with a single flexible section. This design and realization have
also been used to estimate the inertial parameters that will be used in the dynamic models of
these prototypes. First, we have developed the mathematical formulations describing the
structure of the flexible robots which represents a general case of multi-section flexible
robots. Next, we have developed an approach for solving the problem of inverse geometric
modeling of multi-section flexible robots, assuming that each flexible section bends as a
circular arc while keeping the principal axis of the structure inextensible. The problem was
formulated mathematically in terms of optimization of a quadratic cost function under some
constraints of equality (lengths conservation). The problem has been solved by developing an
optimization algorithm including metaheuristic methods, namely the Particle Swarm
Optimization (PSO) and the Genetic Algorithm (GA). This approach was validated by
simulation and two experimental test benches performed on the CBHA robot. Then, we have
also proposed dynamic models, direct and inverse, for the two cable-driven flexible robots,
planar and spatial, using the Lagrange method. In order to simplify the calculations and avoid
some numerical singularities, the dynamic models were approximated by expansion of
Taylor's series. These models have been validated by simulations under the MATLAB
environment. In addition, the inverse dynamic model was validated by real measurements
obtained from the robot UR5. Finally, a proportional-integral-derivative controller (PID) has
been proposed to track trajectories using the point-to-point method.Diplôme : Doctorat en sciences En ligne : ../theses/gmecanique/AMO7101.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10500 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité AMO/7101 AMO/7101 Thèse Bibliothèque principale Thèses Disponible
