Autor: Lichota, P. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Inclusion of the D-optimality in multisine manoeuvre design for aircraft parameter estimation
Autorzy:: Lichota, P.
Powiązania:: https://bibliotekanauki.pl/articles/281598.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: inputs design
system identification
flight dynamics
Opis:: This paper is concerned with the designing of simultaneous flight control deflections for aircraft system identification. The elevator, ailerons and rudder are excited with harmonically related multisine signals. The optimal deflections are designed when there is no information about the stability and control derivatives and when this information is available. The inclusion of the system dynamics in the inputs design phase is done with the D-optimality criterion. Both sets of optimal flight surface deflections are used as excitations of a nonlinear aircraft model which is identified through the maximum likelihood estimation method. Parameters accuracy for those maneuvers (designed with and without a-priori knowledge) is presented and compared.
Źródło:: Journal of Theoretical and Applied Mechanics; 2016, 54, 1; 87-98
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Output Error Method for Tiltrotor Unstable in Hover
Autorzy:: Lichota, P.
Szulczyk, J.
Powiązania:: https://bibliotekanauki.pl/articles/140298.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: flight dynamics
system identification
output error method
maximum likelihood
unstable system
tiltrotor
dynamika lotu
identyfikacja systemu
metoda błędu wyjścia
maksymalne prawdopodobieństwo
system niestabilny
zmiennopłat
Opis:: This article investigates unstable tiltrotor in hover system identification from flight test data. The aircraft dynamics was described by a linear model defined in Body-Fixed-Coordinate System. Output Error Method was selected in order to obtain stability and control derivatives in lateral motion. For estimating model parameters both time and frequency domain formulations were applied. To improve the system identification performed in the time domain, a stabilization matrix was included for evaluating the states. In the end, estimates obtained from various Output Error Method formulations were compared in terms of parameters accuracy and time histories. Evaluations were performed in MATLAB R2009b environment.
Źródło:: Archive of Mechanical Engineering; 2017, LXIV, 1; 23-36
0004-0738
Pojawia się w:: Archive of Mechanical Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Power spectrum optimization in the design of multisine manoeuvre for identification purposes
Autorzy:: Lichota, P.
Szulczyk, J.
Noreña, D. A.
Vallejo Monsalve, F. A.
Powiązania:: https://bibliotekanauki.pl/articles/279485.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: flight dynamics
optimal input design
multisine excitations
system identification
least squares
maximum likelihood
Opis:: In this paper, two sets of multisine signals are designed for system identification purposes. The first one is obtained without any information about system dynamics. In the second case, the a priori information is given in terms of dimensional stability and control derivatives. Magnitude Bode plots are obtained to design the multisine power spectrum that is optimized afterwards. A genetic algorithm with linear ranking, uniform crossover and mutation operator has been employed for that purpose. Both designed manoeuvres are used to excite the aircraft model, and then system identification is performed. The estimated parameters are obtained by applying two methods: Equation Error and Output Error. The comparison of both investigated cases in terms of accuracy and manoeuvre time is presented afterwards.
Źródło:: Journal of Theoretical and Applied Mechanics; 2017, 55, 4; 1193-1203
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

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