Advanced control of aircraft, rockets, and spacecraft [[electronic resource] /] / Ashish Tewari |
Autore | Tewari Ashish |
Pubbl/distr/stampa | Hoboken, N.J., : Wiley, 2011 |
Descrizione fisica | 1 online resource (456 p.) |
Disciplina |
500
629.11 |
Collana | Aerospace Series |
Soggetto topico |
Flight control
Airplanes - Control systems Space vehicles - Control systems Rockets (Aeronautics) - Control systems |
ISBN |
1-119-97274-4
1-283-17775-7 9786613177759 1-119-97119-5 1-119-97120-9 |
Classificazione | TEC002000 |
Formato | Materiale a stampa |
Livello bibliografico | Monografia |
Lingua di pubblicazione | eng |
Nota di contenuto |
Advanced Control of Aircraft, Spacecraft and Rockets; Contents; Series Preface; Preface; 1 Introduction; 1.1 Notation and Basic Definitions; 1.2 Control Systems; 1.2.1 Linear Tracking Systems; 1.2.2 Linear Time-Invariant Tracking Systems; 1.3 Guidance and Control of Flight Vehicles; 1.4 Special Tracking Laws; 1.4.1 Proportional Navigation Guidance; 1.4.2 Cross-Product Steering; 1.4.3 Proportional-Integral-Derivative Control; 1.5 Digital Tracking System; 1.6 Summary; Exercises; References; 2 Optimal Control Techniques; 2.1 Introduction; 2.2 Multi-variable Optimization
2.3 Constrained Minimization2.3.1 Equality Constraints; 2.3.2 Inequality Constraints; 2.4 Optimal Control of Dynamic Systems; 2.4.1 Optimality Conditions; 2.5 The Hamiltonian and the Minimum Principle; 2.5.1 Hamilton-Jacobi-Bellman Equation; 2.5.2 Linear Time-Varying System with Quadratic Performance Index; 2.6 Optimal Control with End-Point State Equality Constraints; 2.6.1 Euler-Lagrange Equations; 2.6.2 Special Cases; 2.7 Numerical Solution of Two-Point Boundary Value Problems; 2.7.1 Shooting Method; 2.7.2 Collocation Method; 2.8 Optimal Terminal Control with Interior Time Constraints 2.8.1 Optimal Singular Control2.9 Tracking Control; 2.9.1 Neighboring Extremal Method and Linear Quadratic Control; 2.10 Stochastic Processes; 2.10.1 Stationary Random Processes; 2.10.2 Filtering of Random Noise; 2.11 Kalman Filter; 2.12 Robust Linear Time-Invariant Control; 2.12.1 LQG/LTR Method; 2.12.2 H2/H8 Design Methods; 2.13 Summary; Exercises; References; 3 Optimal Navigation and Control of Aircraft; 3.1 Aircraft Navigation Plant; 3.1.1 Wind Speed and Direction; 3.1.2 Navigational Subsystems; 3.2 Optimal Aircraft Navigation; 3.2.1 Optimal Navigation Formulation 3.2.2 Extremal Solution of the Boundary-Value Problem: Long-Range Flight Example3.2.3 Great Circle Navigation; 3.3 Aircraft Attitude Dynamics; 3.3.1 Translational and Rotational Kinetics; 3.3.2 Attitude Relative to the Velocity Vector; 3.4 Aerodynamic Forces and Moments; 3.5 Longitudinal Dynamics; 3.5.1 Longitudinal Dynamics Plant; 3.6 Optimal Multi-variable Longitudinal Control; 3.7 Multi-input Optimal Longitudinal Control; 3.8 Optimal Airspeed Control; 3.8.1 LQG/LTR Design Example; 3.8.2 H8 Design Example; 3.8.3 Altitude and Mach Control; 3.9 Lateral-Directional Control Systems 3.9.1 Lateral-Directional Plant3.9.2 Optimal Roll Control; 3.9.3 Multi-variable Lateral-Directional Control: Heading-Hold Autopilot; 3.10 Optimal Control of Inertia-Coupled Aircraft Rotation; 3.11 Summary; Exercises; References; 4 Optimal Guidance of Rockets; 4.1 Introduction; 4.2 Optimal Terminal Guidance of Interceptors; 4.3 Non-planar Optimal Tracking System for Interceptors: 3DPN; 4.4 Flight in a Vertical Plane; 4.5 Optimal Terminal Guidance; 4.6 Vertical Launch of a Rocket (Goddard's Problem); 4.7 Gravity-Turn Trajectory of Launch Vehicles 4.7.1 Launch to Circular Orbit: Modulated Acceleration |
Record Nr. | UNINA-9910139618703321 |
Tewari Ashish | ||
Hoboken, N.J., : Wiley, 2011 | ||
Materiale a stampa | ||
Lo trovi qui: Univ. Federico II | ||
|
Advanced control of aircraft, rockets, and spacecraft [[electronic resource] /] / Ashish Tewari |
Autore | Tewari Ashish |
Pubbl/distr/stampa | Hoboken, N.J., : Wiley, 2011 |
Descrizione fisica | 1 online resource (456 p.) |
Disciplina |
500
629.11 |
Collana | Aerospace Series |
Soggetto topico |
Flight control
Airplanes - Control systems Space vehicles - Control systems Rockets (Aeronautics) - Control systems |
ISBN |
1-119-97274-4
1-283-17775-7 9786613177759 1-119-97119-5 1-119-97120-9 |
Classificazione | TEC002000 |
Formato | Materiale a stampa |
Livello bibliografico | Monografia |
Lingua di pubblicazione | eng |
Nota di contenuto |
Advanced Control of Aircraft, Spacecraft and Rockets; Contents; Series Preface; Preface; 1 Introduction; 1.1 Notation and Basic Definitions; 1.2 Control Systems; 1.2.1 Linear Tracking Systems; 1.2.2 Linear Time-Invariant Tracking Systems; 1.3 Guidance and Control of Flight Vehicles; 1.4 Special Tracking Laws; 1.4.1 Proportional Navigation Guidance; 1.4.2 Cross-Product Steering; 1.4.3 Proportional-Integral-Derivative Control; 1.5 Digital Tracking System; 1.6 Summary; Exercises; References; 2 Optimal Control Techniques; 2.1 Introduction; 2.2 Multi-variable Optimization
2.3 Constrained Minimization2.3.1 Equality Constraints; 2.3.2 Inequality Constraints; 2.4 Optimal Control of Dynamic Systems; 2.4.1 Optimality Conditions; 2.5 The Hamiltonian and the Minimum Principle; 2.5.1 Hamilton-Jacobi-Bellman Equation; 2.5.2 Linear Time-Varying System with Quadratic Performance Index; 2.6 Optimal Control with End-Point State Equality Constraints; 2.6.1 Euler-Lagrange Equations; 2.6.2 Special Cases; 2.7 Numerical Solution of Two-Point Boundary Value Problems; 2.7.1 Shooting Method; 2.7.2 Collocation Method; 2.8 Optimal Terminal Control with Interior Time Constraints 2.8.1 Optimal Singular Control2.9 Tracking Control; 2.9.1 Neighboring Extremal Method and Linear Quadratic Control; 2.10 Stochastic Processes; 2.10.1 Stationary Random Processes; 2.10.2 Filtering of Random Noise; 2.11 Kalman Filter; 2.12 Robust Linear Time-Invariant Control; 2.12.1 LQG/LTR Method; 2.12.2 H2/H8 Design Methods; 2.13 Summary; Exercises; References; 3 Optimal Navigation and Control of Aircraft; 3.1 Aircraft Navigation Plant; 3.1.1 Wind Speed and Direction; 3.1.2 Navigational Subsystems; 3.2 Optimal Aircraft Navigation; 3.2.1 Optimal Navigation Formulation 3.2.2 Extremal Solution of the Boundary-Value Problem: Long-Range Flight Example3.2.3 Great Circle Navigation; 3.3 Aircraft Attitude Dynamics; 3.3.1 Translational and Rotational Kinetics; 3.3.2 Attitude Relative to the Velocity Vector; 3.4 Aerodynamic Forces and Moments; 3.5 Longitudinal Dynamics; 3.5.1 Longitudinal Dynamics Plant; 3.6 Optimal Multi-variable Longitudinal Control; 3.7 Multi-input Optimal Longitudinal Control; 3.8 Optimal Airspeed Control; 3.8.1 LQG/LTR Design Example; 3.8.2 H8 Design Example; 3.8.3 Altitude and Mach Control; 3.9 Lateral-Directional Control Systems 3.9.1 Lateral-Directional Plant3.9.2 Optimal Roll Control; 3.9.3 Multi-variable Lateral-Directional Control: Heading-Hold Autopilot; 3.10 Optimal Control of Inertia-Coupled Aircraft Rotation; 3.11 Summary; Exercises; References; 4 Optimal Guidance of Rockets; 4.1 Introduction; 4.2 Optimal Terminal Guidance of Interceptors; 4.3 Non-planar Optimal Tracking System for Interceptors: 3DPN; 4.4 Flight in a Vertical Plane; 4.5 Optimal Terminal Guidance; 4.6 Vertical Launch of a Rocket (Goddard's Problem); 4.7 Gravity-Turn Trajectory of Launch Vehicles 4.7.1 Launch to Circular Orbit: Modulated Acceleration |
Record Nr. | UNINA-9910818323903321 |
Tewari Ashish | ||
Hoboken, N.J., : Wiley, 2011 | ||
Materiale a stampa | ||
Lo trovi qui: Univ. Federico II | ||
|
Advances in Spacecraft Systems and Orbit Determination / / edited by Rushi Ghadawala |
Pubbl/distr/stampa | Rijeka, Croatia : , : IntechOpen, , 2012 |
Descrizione fisica | 1 online resource (278 pages) : illustrations some color |
Disciplina | 629.41 |
Soggetto topico |
Space vehicles - Orbits
Space vehicles - Control systems Space trajectories |
ISBN | 953-51-6169-5 |
Formato | Materiale a stampa |
Livello bibliografico | Monografia |
Lingua di pubblicazione | eng |
Record Nr. | UNINA-9910138264303321 |
Rijeka, Croatia : , : IntechOpen, , 2012 | ||
Materiale a stampa | ||
Lo trovi qui: Univ. Federico II | ||
|
Analytical mechanics of space systems [[electronic resource] /] / Hanspeter Schaub, John L. Junkins |
Autore | Schaub Hanspeter |
Edizione | [2nd ed.] |
Pubbl/distr/stampa | Reston, Va., : American Institute of Aeronautics and Astronautics, c2009 |
Descrizione fisica | xxi, 793 p. : ill |
Disciplina | 521 |
Altri autori (Persone) | JunkinsJohn L |
Collana | AIAA education series |
Soggetto topico |
Celestial mechanics
Differentiable dynamical systems Orbital mechanics Space vehicles - Control systems |
Soggetto genere / forma | Electronic books. |
ISBN | 1-60086-722-7 |
Formato | Materiale a stampa |
Livello bibliografico | Monografia |
Lingua di pubblicazione | eng |
Nota di contenuto | Particle kinematics -- Newtonian mechanics -- Rigid body kinematics -- Eulerian mechanics -- Generalized methods of analytical dynamics -- Variational methods in analytical dynamics -- Hamilton's generalized formulations of analytical dynamics -- Nonlinear spacecraft stability and control -- Classical two-body problem -- Restricted three-body problem -- Gravitational potential field models -- Perturbation methods -- Transfer orbits -- Spacecraft formation flying -- Appendix A. Transport theorem derivation using linear algebra -- Appendix B. Various Euler angle transformations -- Appendix C. MRP identity proof -- Appendix D. Conic section transformations -- Appendix E. Numerical subroutines library -- Appendix F. First-order mapping between mean and osculating orbit elements -- Appendix G. Direct linear mapping between Cartesian Hill frame coordinates and orbit element differences -- Appendix H. Hamel coefficients for the rotational motion of a rigid body. |
Record Nr. | UNINA-9910457214003321 |
Schaub Hanspeter | ||
Reston, Va., : American Institute of Aeronautics and Astronautics, c2009 | ||
Materiale a stampa | ||
Lo trovi qui: Univ. Federico II | ||
|
Analytical mechanics of space systems / / Hanspeter Schaub, John L. Junkins |
Autore | Schaub Hanspeter |
Edizione | [2nd edition.] |
Pubbl/distr/stampa | Reston, Va., : American Institute of Aeronautics and Astronautics, c2009 |
Descrizione fisica | xxi, 793 p. : ill |
Disciplina | 521 |
Altri autori (Persone) | JunkinsJohn L |
Collana | AIAA education series |
Soggetto topico |
Celestial mechanics
Differentiable dynamical systems Orbital mechanics Space vehicles - Control systems |
ISBN | 1-60086-722-7 |
Formato | Materiale a stampa |
Livello bibliografico | Monografia |
Lingua di pubblicazione | eng |
Nota di contenuto | Particle kinematics -- Newtonian mechanics -- Rigid body kinematics -- Eulerian mechanics -- Generalized methods of analytical dynamics -- Variational methods in analytical dynamics -- Hamilton's generalized formulations of analytical dynamics -- Nonlinear spacecraft stability and control -- Classical two-body problem -- Restricted three-body problem -- Gravitational potential field models -- Perturbation methods -- Transfer orbits -- Spacecraft formation flying -- Appendix A. Transport theorem derivation using linear algebra -- Appendix B. Various Euler angle transformations -- Appendix C. MRP identity proof -- Appendix D. Conic section transformations -- Appendix E. Numerical subroutines library -- Appendix F. First-order mapping between mean and osculating orbit elements -- Appendix G. Direct linear mapping between Cartesian Hill frame coordinates and orbit element differences -- Appendix H. Hamel coefficients for the rotational motion of a rigid body. |
Record Nr. | UNINA-9910781405103321 |
Schaub Hanspeter | ||
Reston, Va., : American Institute of Aeronautics and Astronautics, c2009 | ||
Materiale a stampa | ||
Lo trovi qui: Univ. Federico II | ||
|
Analytical mechanics of space systems / / Hanspeter Schaub, John L. Junkins |
Autore | Schaub Hanspeter |
Edizione | [2nd edition.] |
Pubbl/distr/stampa | Reston, Va., : American Institute of Aeronautics and Astronautics, c2009 |
Descrizione fisica | xxi, 793 p. : ill |
Disciplina | 521 |
Altri autori (Persone) | JunkinsJohn L |
Collana | AIAA education series |
Soggetto topico |
Celestial mechanics
Differentiable dynamical systems Orbital mechanics Space vehicles - Control systems |
ISBN | 1-60086-722-7 |
Formato | Materiale a stampa |
Livello bibliografico | Monografia |
Lingua di pubblicazione | eng |
Nota di contenuto | Particle kinematics -- Newtonian mechanics -- Rigid body kinematics -- Eulerian mechanics -- Generalized methods of analytical dynamics -- Variational methods in analytical dynamics -- Hamilton's generalized formulations of analytical dynamics -- Nonlinear spacecraft stability and control -- Classical two-body problem -- Restricted three-body problem -- Gravitational potential field models -- Perturbation methods -- Transfer orbits -- Spacecraft formation flying -- Appendix A. Transport theorem derivation using linear algebra -- Appendix B. Various Euler angle transformations -- Appendix C. MRP identity proof -- Appendix D. Conic section transformations -- Appendix E. Numerical subroutines library -- Appendix F. First-order mapping between mean and osculating orbit elements -- Appendix G. Direct linear mapping between Cartesian Hill frame coordinates and orbit element differences -- Appendix H. Hamel coefficients for the rotational motion of a rigid body. |
Record Nr. | UNINA-9910824509903321 |
Schaub Hanspeter | ||
Reston, Va., : American Institute of Aeronautics and Astronautics, c2009 | ||
Materiale a stampa | ||
Lo trovi qui: Univ. Federico II | ||
|
Analytical mechanics of space systems [[electronic resource] /] / Hanspeter Schaub, John L. Junkins |
Autore | Schaub Hanspeter |
Pubbl/distr/stampa | Reston, Va., : American Institute of Aeronautics and Astronautics, c2003 |
Descrizione fisica | xix, 711 p. : ill |
Disciplina | 521 |
Altri autori (Persone) | JunkinsJohn L |
Collana | AIAA education series |
Soggetto topico |
Celestial mechanics
Differentiable dynamical systems Orbital mechanics Space vehicles - Control systems |
Soggetto genere / forma | Electronic books. |
ISBN |
1-60086-155-5
1-60086-027-3 |
Formato | Materiale a stampa |
Livello bibliografico | Monografia |
Lingua di pubblicazione | eng |
Nota di contenuto | pt. 1. Basic mechanics -- pt. 2. Celestial mechanics. |
Record Nr. | UNINA-9910454411403321 |
Schaub Hanspeter | ||
Reston, Va., : American Institute of Aeronautics and Astronautics, c2003 | ||
Materiale a stampa | ||
Lo trovi qui: Univ. Federico II | ||
|
Analytical mechanics of space systems [[electronic resource] /] / Hanspeter Schaub, John L. Junkins |
Autore | Schaub Hanspeter |
Pubbl/distr/stampa | Reston, Va., : American Institute of Aeronautics and Astronautics, c2003 |
Descrizione fisica | xix, 711 p. : ill |
Disciplina | 521 |
Altri autori (Persone) | JunkinsJohn L |
Collana | AIAA education series |
Soggetto topico |
Celestial mechanics
Differentiable dynamical systems Orbital mechanics Space vehicles - Control systems |
ISBN |
1-60086-155-5
1-60086-027-3 |
Formato | Materiale a stampa |
Livello bibliografico | Monografia |
Lingua di pubblicazione | eng |
Nota di contenuto | pt. 1. Basic mechanics -- pt. 2. Celestial mechanics. |
Record Nr. | UNINA-9910782754103321 |
Schaub Hanspeter | ||
Reston, Va., : American Institute of Aeronautics and Astronautics, c2003 | ||
Materiale a stampa | ||
Lo trovi qui: Univ. Federico II | ||
|
Analytical mechanics of space systems [[electronic resource] /] / Hanspeter Schaub, John L. Junkins |
Autore | Schaub Hanspeter |
Pubbl/distr/stampa | Reston, Va., : American Institute of Aeronautics and Astronautics, c2003 |
Descrizione fisica | xix, 711 p. : ill |
Disciplina | 521 |
Altri autori (Persone) | JunkinsJohn L |
Collana | AIAA education series |
Soggetto topico |
Celestial mechanics
Differentiable dynamical systems Orbital mechanics Space vehicles - Control systems |
ISBN |
1-60086-155-5
1-60086-027-3 |
Formato | Materiale a stampa |
Livello bibliografico | Monografia |
Lingua di pubblicazione | eng |
Nota di contenuto | pt. 1. Basic mechanics -- pt. 2. Celestial mechanics. |
Record Nr. | UNINA-9910823968903321 |
Schaub Hanspeter | ||
Reston, Va., : American Institute of Aeronautics and Astronautics, c2003 | ||
Materiale a stampa | ||
Lo trovi qui: Univ. Federico II | ||
|
Automatic control in aerospace : Aerospace Control '94 : a postprint volume from the IFAC symposium, Palo Alto, California, USA, 12-16 September 1994 / / edited by D. B. Schaechter and K. R. Lorell |
Edizione | [First edition.] |
Pubbl/distr/stampa | Oxford, England : , : Pergamon, , 1995 |
Descrizione fisica | 1 online resource (447 p.) |
Disciplina |
629.132/6
629.1326 |
Collana | IFAC Postprint Volume |
Soggetto topico |
Airplanes - Control systems
Airplanes - Automatic control Space vehicles - Control systems Space vehicles - Automatic control |
ISBN | 1-4832-9692-X |
Formato | Materiale a stampa |
Livello bibliografico | Monografia |
Lingua di pubblicazione | eng |
Nota di contenuto |
""Front Cover""; ""Automatic Control in Aerospace (Aerospace Control '94)""; ""Copyright Page""; ""Table of Contents""; ""IFAC SYMPOSIUM ON AUTOMATIC CONTROL IN AEROSPACE 1994""; ""CHAPTER 1. OPTIMAL MULTI-CRITERIA AEROASSISTED ORBITAL TRANSFER TRAJECTORIES""; ""1. INTRODUCTION""; ""2. MATHEMATICAL MODEL""; ""3. MULTI-CRITERIA TRAJECTORY OPTIMIZATION""; ""4. THE AEROASSISTED ORBITAL TRANSFER PROBLEM""; ""5. RESULTS AND DISCUSSION""; ""6. CONCLUSIONS""; ""Acknowledgments""; ""7. REFERENCES""; ""CHAPTER 2. ROCKET ASCENT WITH HEAT-FLUX AND SPLASH DOWNCONSTRAINTS""; ""1 INTRODUCTION""
""2 MATHEMATICAL MODELS""""3 OPTIMIZATION METHOD""; ""4 COMPUTATIONAL STUDY""; ""5 CONCLUSIONS""; ""6 REFERENCES""; ""CHAPTER 3. HIERARCHICAL MODELING APPROACH IN AIRCRAFT TRAJECTORY OPTIMIZATION""; ""1. INTRODUCTION""; ""2. MATHEMATICAL MODELING""; ""3. DYNAMIC-MODEL STRUCTURE""; ""4. HIERARCHICAL OPTIMIZATION""; ""5. NUMERICAL RESULTS""; ""CONCLUSIONS""; ""ACKNOWLEDGEMENTS""; ""REFERENCES""; ""CHAPTER 4. NONLINEAR ANALYSIS AND DESIGN OF SHUTTLE-TYPE ENTRY GUIDANCE""; ""1. INTRODUCTION""; ""2. GUIDANCE PROBLEM FORMULATION""; ""3. GUIDANCE LAWS""; ""4. STABILITY AND PERFORMANCE"" ""5. ASSESSMENT""""6. CONCLUSIONS""; ""7. ACKNOWLEDGMENT""; ""8. REFERENCES""; ""CHAPTER 5. OPTIMAL GUIDANCE OF A SOLAR SAIL SPACECRAFT TO THE SUN-EARTH L2 POINT""; ""1. INTRODUCTION""; ""2. PROBLEM DEFINITION""; ""3. OPEN-LOOP TRAJECTORY""; ""4. GUIDANCE""; ""5. CONCLUSIONS""; ""6. REFERENCES""; ""CHAPTER 6. ADAPTIVE WING CAMBER OPTIMIZATION: A PERIODIC PERTURBATION APPROACH""; ""1. INTRODUCTION""; ""2. PROBLEM FORMULATION""; ""3. A PERIODIC PERTURBATION EXTREMASEARCHING TECHNIQUE: THE WORKING PRINCIPLE""; ""4. PRACTICAL IMPLEMENTATION OF THE ALGORITHM: EQUIVALENT CIRCUIT AND DESIGN"" ""5. APPLICATION TO ACTIVE CAMBER OPTIMIZATION""""6. CONCLUDING REMARKS""; ""7. REFERENCES""; ""CHAPTER 7. PARAMETER ROBUST FLIGHT CONTROL SYSTEMFOR A FLEXIBLE AIRCRAFT""; ""1. INTRODUCTION""; ""2. MIXED CONTROL""; ""3. PARAMETER ROBUST MIXED CONTROL""; ""4. PERFORMANCE REQUIREMENT""; ""5. APPLICATION""; ""6. CONCLUSION""; ""7. REFERENCES""; ""CHAPTER 8. NON-SMOOTH RESONANCE CONTROL OF COMPLEX BIFURCATIONS IN AIRCRAFT FLIGHT""; ""1. INTRODUCTION""; ""2. NORMAL FORMS AND AVERAGING REDUCTION METHODS""; ""3. ESTIMATION OF RESIDUAL TERMS""; ""4 . RESONANCE STABILIZATION"" ""5. ANALYSIS AND CONTROL OF COMPLEX BIFURCATIONS OF AN AIRCRAFT MODEL""""6. CONCLUSION""; ""7. REFERENCES""; ""CHAPTER 9. HIGH ANGLE OF ATTACK VELOCITY VECTOR ROLLS""; ""1. INTRODUCTION""; ""2. APPROACH""; ""3. MODELING""; ""4. QFT OVERVIEW""; ""5. ATTACK ON NONLINEARITIES AND UNCERTAINTY""; ""6. CONTROLLER DESIGN""; ""7. RESULTS""; ""8. CONCLUSIONS""; ""9. REFERENCES""; ""CHAPTER 10. A ROUTE ORIENTED PLANNING AND CONTROL CONCEPT FOR EFFICIENT FLIGHT OPERATIONS AT BUSY AIRPORTS""; ""1. INTRODUCTION""; ""2. CURRENT AIRPORT OPERATIONS""; ""3. CONCEPT DESCRIPTION""; ""4. DESIGN ALGORITHMS"" ""5. PLANNING OF LANDING SEQUENCES AND SCHEDULES"" |
Record Nr. | UNINA-9910788199903321 |
Oxford, England : , : Pergamon, , 1995 | ||
Materiale a stampa | ||
Lo trovi qui: Univ. Federico II | ||
|