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Longitudinal automatic carrier-landing control law rejecting disturbances and coupling based on adaptive dynamic inversion

Wang Lipeng, Zhang Zhi, Zhu Qidan, Wen Zixia

Bulletin of the Polish Academy of Sciences. Technical Sciences

2021

Vol. 69, nr 1

art. no. e136217

The longitudinal automatic carrier landing system (ACLS) control law is designed based on nonlinear dynamic inversion (NDI), which can reject air wake, decouple lateral states, and track the dynamic desired touchdown point (DTP). First of all, the nonlinear landing model of F/A−18 aircraft in the final approach is established, in which the parameters of the aerodynamic, control surfaces, and limited states are acquired. Second, the strategy of tracking the desired longitudinal trajectory through pitch angle control is adopted. The automatic power compensation system (APCS), pitch angle rate, pitch angle, and vertical position control loops are developed based on the adaptive NDI. The stable analysis and the principal description are derived in detail. Deck motion compensation (DMC) algorithm is designed by frequency response method. Third, the control parameters are optimized through the genetic algorithm. A fitness function integrated with velocity, angle of attack (AOA), pitch rate, pitch angle, and vertical position of the aircraft are proposed. Finally, integrated simulations are conducted on a semi-physical simulation platform. The results indicate that the adopted automatic landing control law can achieve both excellent performance and the ability to reject the air wake and lateral coupling.

System automatycznego lądowania pojazdów bezzałogowych

Chabko K., Zawiślak J.

Elektronika : konstrukcje, technologie, zastosowania

2017

Vol. 58, nr 2

23--26

Artykuł opisuje zmodyfikowany system bezzałogowego pojazdu latającego potocznie zwanego dronem, który został rozbudowany o system automatycznego lądowania. Rozbudowa wymagała modyfikacji sprzętowych oraz ingerencji w system sterowania pojazdem. Wykorzystane zostały metody cyfrowego przetwarzania obrazu oraz algorytmy wykorzystywane w automatycznym sterowaniu.

The article describes modified system of unmanned flying vehicle commonly known as drone, which has been upgraded with an automatic landing system. This expansion required hardware modifications and interference in the control system of the vehicle. Have been used methods of digital image processing and algorithms of standard automatic control.