Airliner automatic landing optimal trajectory shaping based on anthropocentric principle

Аuthors

Kostyukov V. M.^*, Trinh V. T.^**, Nguyen N. M.^***

Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: kost_slv@mail.ru
**e-mail: trinhvanthanh@mail.ru
***e-mail: ngnhuman@yahoo.com

Abstract

This paper considers and algorithm of optimal landing trajectory shaping. Realization of this trajectory in automatic mode will maximally simplify the problem of transition to aircraft manual control.

Aircraft landing is considered to be the most laborious phase of the flight. The basis of the algorithm development consists in selection of automatically controlled trajectory as close as possible to the trajectories implemented by the pilot in the course of a manual landing, which will provide maximum convenience for the pilot in case of automatic landing failure. Thus, enhanced flight safety is provided.

The principle of the methodology consists in creation of formal specification of pilots actions during manual landing in the form of several optimization problems based on pilots actions in the course of manual landing. Thus, we consider the pilot as an optimal regulator, which performance criteria are sel ected according to the analysis of experimental data obtained earlier. As far as we consider manual control mode, the algorithm of control actions development should be made consistent both with emerged situation characteristics and with current characteristics of the pilot as well as the aircraft.

The paper analyses and formalizes flaring-out stage of the flight, which will provide landing safety. For this purpose, we realize on board the aircraft the flaring-out modeling algorithm with various options of throttle control and flaring-out altitude. Optimization herewith consists in selection of throttle control law and flaring- out altitude, wherein maximum regulator (a pilot, or ACS) error is tolerable.

Control performance of a pilot is considered in the course of studying of quasi-linear model which parameters are determined by recurrent identification in the process of flight realization.

We formalize glide-path capture in the form of the problem of optimal aircraft control, which criterion parameters are obtained fr om the experimental data analysis of successful variants of manual landing approaches.

Keywords:

the optimal aircraft landing trajectory, permissible initial flare-out altitudes zone, optimal flare-out altitude, anthropocentric principle, screen effect, flight dynamics models, optimal pilots control actions criterion

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