On‐line RNN compensated second order nonsingular terminal sliding mode control for hypersonic vehicle
International Journal of Intelligent Computing and Cybernetics
ISSN: 1756-378X
Article publication date: 1 June 2012
Abstract
Purpose
The purpose of this paper is to design a robust control scheme to achieve robust tracking of velocity and altitude commands for a general hypersonic vehicle (HSV) in the presence of parameter variations and external disturbances.
Design/methodology/approach
The robust control scheme is composed of nonsingular terminal sliding mode control (NTSMC), super twisting control algorithm (STC) and recurrent neural network (RNN). First, by combing a novel NTSMC and STC algorithm, a second order NTSMC approach for HSV is proposed to provide fast, continuous and high precision tracking control. Second to relax the requirements for the bounds of the lumped uncertainties in control design, a RNN disturbance observer is presented to increase the robustness of the control system. The weights of RNN are updated by adaptive laws based on Lyapunov theorem, thus the closed‐loop stability can be guaranteed.
Findings
Simulation results demonstrate that the proposed method is effective, leading to promising performance.
Originality/value
The main contributions of this work are: first, both parameter variations and external disturbances are considered in control design for the longitudinal dynamic model of HSV; and second, the proposed controller can remove chattering and achieve more favorable tracking performances than conventional sliding mode control.
Keywords
Citation
Zhang, R., Wang, L. and Zhou, Y. (2012), "On‐line RNN compensated second order nonsingular terminal sliding mode control for hypersonic vehicle", International Journal of Intelligent Computing and Cybernetics, Vol. 5 No. 2, pp. 186-205. https://doi.org/10.1108/17563781211231534
Publisher
:Emerald Group Publishing Limited
Copyright © 2012, Emerald Group Publishing Limited