ETD

Digital archive of theses discussed at the University of Pisa

 

Thesis etd-05202014-161559


Thesis type
Tesi di laurea magistrale
Author
QUINTILI, SARA
URN
etd-05202014-161559
Thesis title
Design of primary flight control laws for a high-performance aircraft using multivariable robust control techniques
Department
INGEGNERIA CIVILE E INDUSTRIALE
Course of study
INGEGNERIA AEROSPAZIALE
Supervisors
relatore Denti, Eugenio
relatore Mengali, Giovanni
relatore Nasuti, Francesco
Keywords
  • control laws
  • lqr
Graduation session start date
11/06/2014
Availability
Full
Summary
The aim of this thesis is to evaluate an alternative design for the lateral-directional primary control laws for the M346 "Master" Advanced Trainer Aircraft, using modern design techniques. The proposed design has been developed for a limited but significant flight envelope (in term of AoA and speed range): the resulting closed loop system tracks roll rate and angle of sideslip (AoS) as commanded by the pilot by means of lateral stick and pedal deflections, with the required handling performance, for each mass and aerodynamic tolerance case. The selected approach is based on the Linear Quadratic theory. The application of the LQR technique allowed all the control gains to be computed simultaneously, and provided guarantee of large stability margins.

The first part of the thesis presents the design techniques used in this work.

The second part describes the linear stability and handling criteria that will be used to analyze effects and characteristics of the proposed control laws.

The third part presents the control laws Synthesis.

In the fourth part the reader will find the design validation for the controller.

The fifth part is dedicated to the results presentation.
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