22nd Congress of International Council of the Aeronautical Sciences, Harrogate, UK, 28 August - 1st September, 2000
Paper ICAS 2000-7.5.1
MODELLING OF THE CONTROL OF A THRUST VECTORED AIRCRAFT
G. Vinelli
Politecnico di Torino, Dipartimento di Ingegneria Aeronautica e Spaziale, Italy
Keywords: thrust vectored aircraft
Different techniques has been studied to improve
the controllability and maneuverability
of flying vehicles. In detail the possibility of
using the differential thrust of the engines as
an emergency control means has been considered
for aircrafts such as B-747, B-777 and
above all MD-11 [1] [2]. Concerning the performances
of a fighter aircraft, one of the techniques
used to improve the characteristics of
maneuverability even in post-stall area is the
possibility of turning the direction of the exhausted
thrust of the nozzles: thrust vectoring
(TV) [3] [4]. The capabilities in controlling
the aircraft are augmented using the components
of the propulsive force; in this way it is
possible to have an effective control even beyond
the stall limit of the aerodynamic control
surfaces. On the other hand, the use of
TV make the energetic level of the vehicle decrease
because, as the direction of the thrust
is detected, the force component which opposites
aerodynamic drag is reduced and there is
a loss in height and speed.
Object of this paper is the analysis of
the dynamical model of an aircraft with a
defined configuration (HIRM, High Incidence
Research Model) and a TV control system.
A program in Visual Basic has been developed
to realize a real time simulation of the
aeromechanics behavior of the studied model.
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