Ing Ind - Inf (Mag.)(ord. 270) - BV (469) AERONAUTICAL ENGINEERING - INGEGNERIA AERONAUTICA
055736 - AIRPLANE PERFORMANCE AND DYNAMICS
The second module of the “Airplane Performance and Dynamics” integrated course aims at providing the student the means to analyze problems connected with the dynamics of flight. Starting from the non-linear dynamic equations of motion for a rigid aircraft in three-dimensional space, developed in the first module, the students are guided through a rigorous linearization procedure, yielding a model of more limited validity, but more readily usable to understand typical aircraft dynamics. In the process, the aerodynamic forcing term is linearized too, producing stability- and control-related derivatives. The obtainment of a linearized model provides a key asset in understanding model hierarchy: what type of model is suitable for assigned simulation, performance measurement, static and dynamic stability, control design or identification tasks.
Furthermore, the estimation of each of the involved derivatives based on simple empirical or analytical models from basic geometrical measures pertaining to a specific aircraft is carried out. These models are analyzed in some detail, providing an understanding of what features of an aircraft impact its behavior and how.
Under more stringent simplifications, the longitudinal and lateral-directional motions are decoupled, and the corresponding lower order systems analyzed showing the direct impact of certain aircraft characteristics on eigendynamics. This provides a deep understanding of the relationship between aircraft inertia and shape/geometry (i.e. design characteristics) and aircraft dynamics, with application to dynamic performance analysis and control design. A basic outline of more advanced phenomena for which further modeling would be necessary will be also provided, helping in understanding the limits of the adopted models.
Risultati di apprendimento attesi
After fully completing the module, the student should be able to:
master the model hierarchy leading from a non-linear model to a set of linearized and decoupled models for aircraft dynamics;
understand the capabilities, potential uses (e.g. for control design or performance assessment) and limitations of each mathematical model;
analyze the impact of aircraft geometry and configurational choices on stability and control;
analyze the impact of inertia and aerodynamics, in turn influenced by aircraft geometry and configuration, on some basic dynamic characteristics typical to aircraft motion;
understand the effect of design choices on the dynamics of an aircraft.
Linearized equations of motion, longitudinal/latero-directional decoupling, stability and control derivatives. Dynamic response and stability, simulation of flight, flying qualities. Introduction to more complex phenomena and effects on model characteristics.
Basic notions on aircraft configuration and fundamental of flight mechanics (trajectory analysis, drag polar and performance attitudes, basic performance). Completion of AIRPLANE PERFORMANCE AND DYNAMICS first module: AIRPLANE INITIAL SIZING.
Modalità di valutazione
The evaluation will take place through a single written exam for the two modules of the integrated course "Airplane Performance and Dynamics". At the teacher's discretion, it may necessary to complete the assessment through an additional oral exam.
Bandu N. Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, ISBN: 978-1624102745
Giorgio Guglieri, Carlo E.D. Riboldi, Introduction to Flight Dynamics, ISBN: 978-8867890422
Tipo Forma Didattica
Ore di attività svolte in aula
Ore di studio autonome
Laboratorio Di Progetto
Informazioni in lingua inglese a supporto dell'internazionalizzazione
Insegnamento erogato in lingua
Disponibilità di libri di testo/bibliografia in lingua inglese
Possibilità di sostenere l'esame in lingua inglese
Disponibilità di supporto didattico in lingua inglese