DocumentCode :
635052
Title :
Adaptive discrete-time control with dual neural networks for HFV via back-stepping
Author :
Jianxin Ren ; Xingmei Zhao ; Bin Xu
Author_Institution :
Sch. of Autom., Northwestern Polytech. Univ., Xi´an, China
fYear :
2013
fDate :
23-26 June 2013
Firstpage :
1
Lastpage :
6
Abstract :
The article investigates the discrete-time controller for the longitudinal dynamics of the hypersonic flight vehicle. Based on the analysis of the control inputs, the dynamics model can be decomposed into the altitude subsystem and the velocity subsystem. Using the first-order Taylor expansion, the altitude subsystem can be transformed into discrete-time model, and then the strict-feedback form can be obtained. The controller is designed via back-stepping method. During this progress, neural networks are employed to approximate the mismatched uncertainties. Neural networks are used on the denominator of the controller as well as on the numerator of the controller to approximate the whole uncertainty (including the nominal value). The dual neural network controller via back-stepping is able to track system instructions accurately. Stability analysis proves that the errors of all the signals in the system are of uniform ultimate bound-ness. The simulation results show the effectiveness of the proposed controller.
Keywords :
adaptive control; aircraft control; approximation theory; control system synthesis; discrete time systems; feedback; neurocontrollers; stability; uncertain systems; HFV; adaptive discrete-time control; altitude subsystem; back-stepping method; controller design; discrete-time controller; dual neural network controller; dual neural networks; dynamics model; first-order Taylor expansion; hypersonic flight vehicle; longitudinal dynamics; mismatched uncertainties approximation; stability analysis; strict-feedback form; velocity subsystem; Artificial neural networks; Equations; Mathematical model; Uncertainty; Vehicle dynamics; Vehicles; back-stepping; discrete control; dual neural network; hypersonic flight vehicle; longitudinal dynimics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Control Conference (ASCC), 2013 9th Asian
Conference_Location :
Istanbul
Print_ISBN :
978-1-4673-5767-8
Type :
conf
DOI :
10.1109/ASCC.2013.6606168
Filename :
6606168
Link To Document :
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