Thesis /

ROMDOC-THESIS-2010-091

Sisteme de control automat al zborului ; Metode de sinteză a algoritmilor de comandă automată pentru aterizare

Berbente, Sorin (UPB)
2007-01-01

Abstract: A series of methods for the performant design of automatic landing control systems is studied. An important aspect is to consider from the very design stage the effect of the real atmospherical perturbations – especially windshears and turbulence in the run way zone, in order to maintain safely the aircraft on the landing slope. Thus one can establish in advance the behaviour of the autopilot in real flight coditions, unlike the classical approach when a certain hopefully stable automatic landing controller has to be stabilized thereafter with respect to a given set of standard distubances. The methodology developed in this doctoral thesis includes a series of novelties and advantages such as: 1) the determination of the secured manoeuvrability limits of the aircraft for a prescribed intensity of perturbation; 2) the simultaneous operation of several control surfaces of the aircraft making thus possible to take over or compensate the functions of the damaged surface (for example a stuck elevator); 3) another novelty element is the design of a digital automatic controller by solving a H2 problem related to a system with sampled information. A large number of case – studies illustrating the proposed methodology are presented. From the given grphics one can clearly follow the behaviour of the control surfaces that really took action when a windshear or a lateral wind occurred, their amplitude and fequency, as well as the possible overstress. A number of numerical simulations with stuck control surfaces brings in evidence the necessary compensatory manoeuvers and their effectiveness.

Keyword(s): Pilot automat -- Aeronautică -- Teză de doctorat ; Sisteme de conducere -- Aeronautică -- Teză de doctorat ; Aerodinamică -- Teză de doctorat
Note: Ionescu, Vlad Neamtu, Mihai

OPAC: See record in BC-UPB Web OPAC
Full Text: see files

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