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Archivio digitale delle tesi discusse presso l’Università di Pisa

Tesi etd-10312017-145804


Tipo di tesi
Tesi di laurea magistrale
Autore
PIZZINO, ANTONINO FRANCO
URN
etd-10312017-145804
Titolo
"Aircraft directional dynamics with hydraulic differential brakes: landing gears modelling and anti-skid control design with gear-walk suppression"
Dipartimento
INGEGNERIA CIVILE E INDUSTRIALE
Corso di studi
INGEGNERIA AEROSPAZIALE
Relatori
relatore Prof. Di Rito, Gianpietro
relatore Prof. Galatolo, Roberto
relatore Ing. Schettini, Francesco
Parole chiave
  • anti-skid control
  • differential brakes
  • gear-walk suppression
  • Landing gears dynamics
Data inizio appello
28/11/2017
Consultabilità
Completa
Riassunto
This thesis is part of the research activities carried out at Dipartimento di Ingegneria Civile ed Industriale for the development of the landing roll-out simulator of a light jet aircraft. The main objective of the simulator is to assess the feasibility of implementing automatic control functions for the directional control of the aircraft through the combined use of standard commands (steering and rudder) with hydraulic differential brakes. An adequate modeling of landing gears and brake dynamics is an important issue for the analysis of the behavior of an aircraft during ground maneuvers, as potentially unstable phenomenon such as gear walk may occur in this phase. In the first part, the present work is focused on a more realistic simulation of main landing gears dynamic, that is modeled considering the real geometry and kinematics. The effects are evaluated with nonlinear analyses in Simulink, that shows improvements in aircraft performance and directional stability. In the second part a Slip Ratio Control is realized by taking into account the main landing gear walk dynamic. The anti-skid control is designed to prevent instability of main landing gear vibration during the braking phase.
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