# 93848 - Atmospheric Flight Dynamics

### Course Unit Page

• Teacher Fabrizio Giulietti

• Credits 6

• SSD ING-IND/03

• Teaching Mode Traditional lectures

• Language English

• Campus of Forli

• Degree Programme Second cycle degree programme (LM) in Aerospace Engineering (cod. 5723)

Also valid for Second cycle degree programme (LM) in Aerospace Engineering (cod. 5723)

• Course Timetable from Feb 21, 2023 to May 31, 2023

### SDGs

This teaching activity contributes to the achievement of the Sustainable Development Goals of the UN 2030 Agenda.

## Learning outcomes

Starting from the six degrees-of-freedom equations of motion, fundamentals of aircraft longitudinal and lateral-directional dynamics are addressed. Relationship between geometric, inertial and aerodynamic features to pilot commands and external disturbances are highlighted.

## Course contents

INTRODUCTORY TOPICS

Reference Frames, Attitude representation, Euler Angles, Rotation matrices, Rigid Body equations of motion.

FIXED WING AIRCRAFT DYNAMICS

Aircraft external efforts: gravitational, propulsive and aerodynamic forces and moments, wind gusts and turbulence Aircraft dynamics linearisation, Stability derivatives, Decoupled Lon-lat models Longitudinal dynamics: Short Period, Phugoid Modes Lateral-directional dynamics: DR, Roll, Spiral Modes. Roll/yaw coupling

ROTARY WING AIRCRAFT DYNAMICS

Rotary Wing aircraft layout. Fundamentals of rotor dynamics. Helicopters and multi-rotor aircraft modelling and simulation.

AIRCRAFT&ROTORCRAFT FEEDBACK CONTROL

Block diagrams, transfer function Laplace transforms, 1 & 2 order systems theory Root Locus, Bode Diagrams, Gain and Phase margin technique Introduction to atmospheric fligth control systems: SAS, CSAS, Autopilot schemes HQ, handling qualities Aircraft Longitudinal Control: Pitch Damper, Attitude Control, Flight Path Autopilots (speed & altitude) Aircraft Lat/Dir Control: Roll&Yaw Dampers, Turn Coordination, Flight Path Autopilots (heading) Human pilot in the Loop Multirotors feedback control (with practical sessions)

1] McLean, Automatic Flight Control Systems, Prentice Hall

2] Ashkenas, Aircraft Dynamics and Automatic Control, Wiley

3] Ogata, Modern Control Engineering, Wiley

4] Stevens and Lewis, Aircraft Simulation and Control

## Teaching methods

Class Lectures

Flight experience with instructor

## Assessment methods

1] Multiple choice questions (20')

2] Written exams with theory and exercises (1h 20')

3] Practical session with simulation software with oral discussion (1h 15')

## Teaching tools

Software simulation models for atmospheric flight dynamics assessment and control system design.

Class lecture notes will be uploaded (.pdf files) on Insegnamenti on Line platform.

## Office hours

See the website of Fabrizio Giulietti