title: High-order tracking differentiator based adaptive neural control of a flexible air-breathing hypersonic vehicle subject to actuators constraints.
abstract: In this paper, an adaptive neural controller is exploited for a constrained flexible air-breathing hypersonic vehicle (FAHV) based on high-order tracking differentiator (HTD). By utilizing functional decomposition methodology, the dynamic model is reasonably decomposed into the respective velocity subsystem and altitude subsystem. For the velocity subsystem, a dynamic inversion based neural controller is constructed. By introducing the HTD to adaptively estimate the newly defined states generated in the process of model transformation, a novel neural based altitude controller that is quite simpler than the ones derived from back-stepping is addressed based on the normal output-feedback form instead of the strict-feedback formulation. Based on minimal-learning parameter scheme, only two neural networks with two adaptive parameters are needed for neural approximation. Especially, a novel auxiliary system is explored to deal with the problem of control inputs constraints. Finally, simulation results are presented to test the effectiveness of the proposed control strategy in the presence of system uncertainties and actuators constraints.
authors.affiliation: Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China. Electronic address: buxiangwei1987@126.com.
authors.forename: Xiangwei
authors.initials: X
authors.lastname: Bu
authors.affiliation: Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Wu
authors.affiliation: 95486 People׳s Liberation Army Troops, Chengdu 610077, China.
authors.forename: Mingyan
authors.initials: M
authors.lastname: Tian
authors.affiliation: Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China.
authors.forename: Jiaqi
authors.initials: J
authors.lastname: Huang
authors.affiliation: Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.affiliation: Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Ma
mesh_terms: D000392:Air Movements; D000465:Algorithms; D003198:Computer Simulation; D005246:Feedback; D000069550:Machine Learning; D008962:Models, Theoretical; D016571:Neural Networks, Computer; D018531:Spacecraft
keywords: Actuators constraints; Flexible air-breathing hypersonic vehicle (FAHV); High-order tracking differentiator (HTD); Minimal-learning parameter; Neural network