A robust constrained control approach for flexible air‐breathing hypersonic vehicles. (17th February 2020)

• Record Type: Journal Article
• Authors: Bu, Xiangwei; Wei, Daozhi; He, Guangjun
• Is Part Of: International journal of robust and nonlinear control. Volume 30:Number 7(2020)
• Page Start: 2752
• Page End: 2776
• Publication Date: 2020-02-17
• Subjects: back‐stepping -- control input constraints -- dynamic surface control -- flexible air‐breathing hypersonic vehicle (FAHV) -- nonlinear disturbance observer (NDO) -- parametric uncertainties; Automatic control -- Periodicals; Control theory -- Periodicals; Nonlinear systems -- Periodicals; 629.836
• DOI: 10.1002/rnc.4912
• Languages: English
• ISSNs: 1049-8923

Abstract

Abstract: This article investigates the robust adaptive control system design for the longitudinal dynamics of a flexible air‐breathing hypersonic vehicle (FAHV) subject to parametric uncertainties and control input constraints. A combination of back‐stepping and nonlinear disturbance observer (NDO) is utilized for exploiting an adaptive output‐feedback controller to provide robust tracking of velocity and altitude reference trajectories in the presence of flexible effects and system uncertainties. The dynamic surface control is introduced to solve the problem of "explosion of terms." A new NDO is developed to guarantee the proposed controller's disturbance attenuation ability and to performance robustness against uncertain aerodynamic coefficients. To deal with the problem of actuator saturation, a novel auxiliary system is exploited to compensate the desired control laws. The stability of the presented NDO and controller is analyzed. Simulation results are given to demonstrate the effectiveness of the presented control strategy.