Design of an L1 Adaptive Controller for Air-breathing Hypersonic Vehicle Model in the Presence of Unmodeled Dynamics

2007 ◽  
Author(s):  
Yu Lei ◽  
Chengyu Cao ◽  
Eugene Cliff ◽  
Naira Hovakimyan ◽  
Andy Kurdila
Keyword(s):  
Adaptive Controller ◽  
Hypersonic Vehicle ◽  
Unmodeled Dynamics ◽  
Vehicle Model ◽  
Air Breathing ◽  
L1 Adaptive Controller

Anti-Windup Control for an Air-Breathing Hypersonic Vehicle Model

2005 ◽  
Author(s):  
Kevin P. Groves ◽  
Andrea Serrani ◽  
Stephen Yurkovich ◽  
Michael A. Bolender ◽  
David B. Doman
Keyword(s):  
Hypersonic Vehicle ◽  
Vehicle Model ◽  
Air Breathing

scholarly journals Stochastic Control-Oriented Modeling of Flexible Air-Breathing Hypersonic Vehicle

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Yan-rui Wu ◽  
Peng-fei Yang ◽  
You-li Wu
Keyword(s):  
Stochastic Control ◽  
Colored Noise ◽  
Control Design ◽  
Original System ◽  
Hypersonic Vehicle ◽  
Vehicle Model ◽  
Feedback Form ◽  
Stochastic Perturbations ◽  
Air Breathing ◽  
Generalized Force

The flexible dynamics of commonly used air-breathing hypersonic vehicle model are not tractable for control design and the inevitable stochastic perturbations are usually neglected. Aiming at these deficiencies, reduced flexible dynamics are deducted in this paper and a stochastic control-oriented vehicle model is established accordingly. The responses of the original system to the deterministic and the stochastic part of the generalized force, which is treated as the input of the flexible dynamic system, are analyzed. After that, the simplified flexible dynamics is deduced to approximate the responses. The reduced flexible dynamics, which are tractable for control design since they greatly reduce the complexity of the original dynamics, are comprised of a simple function of the determined generalized force and an Ornstein-Uhlenbeck colored noise. Finally, the longitudinal dynamics in parametric strict feedback form are obtained by substituting the reduced flexible dynamics into the original model. The applicability of the simplified flexible dynamics is validated through the numerical simulations.

scholarly journals L1 Adaptive Loss Fault Tolerance Control of Unmanned Hypersonic Aircraft with Elasticity

Aerospace ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 176
Author(s):  
Zhaoying Li ◽  
Shuai Shi
Keyword(s):  
Fault Tolerance ◽  
Pid Controller ◽  
Control Method ◽  
Adaptive Controller ◽  
Hypersonic Vehicle ◽  
L1 Adaptive Control ◽  
Hypersonic Aircraft ◽  
L1 Adaptive Controller ◽  
Tolerance Control ◽  
Loss Of Actuator Effectiveness

This paper investigates the fault tolerance control of hypersonic aircrafts with L1 adaptive control method in the presence of loss of actuator effectiveness fault. The hypersonic model considers the uncertainties caused by the features of nonlinearities and couplings. Elasticity is taken into account in hypersonic vehicle modeling which makes the model more accurate. A velocity L1 adaptive controller and an altitude L1 adaptive controller are designed to control flexible hypersonic vehicle model with actuator loss fault. A PID controller is designed as well for comparison. Finally, the simulation results are used to analyze the effectiveness of the controller. Compared to the results of PID controller, L1 controllers have better performance.

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