Approximate Back-Stepping Fault-Tolerant Control of the Flexible Air-Breathing Hypersonic Vehicle

• Published in: IEEE/ASME transactions on mechatronics Vol. 21; no. 3; pp. 1680 - 1691
• Main Authors: An, Hao, Liu, Jianxing, Wang, Changhong, Wu, Ligang
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: actuator constraint; Actuators; Adaptation models; Aerodynamics; Air-breathing hypersonic vehicle (AHV); approximate back-stepping; faulttolerant control; Nickel; sliding mode control (SMC); Uncertainty; Vehicle dynamics; Vehicles; air-breathing hypersonic vehicle; sliding mode control (SMC); fault-tolerant control; approximate back-stepping; Actuator constraint
• DOI: 10.1109/TMECH.2015.2507186
• ISSN: 1083-4435

This paper deals with fault-tolerant output tracking control for the flexible air-breathing hypersonic vehicle (AHV) subject to parametric uncertainties, external disturbances, and actuator constraints. By regarding the flexible dynamics as equivalent disturbances, the vehicle model can be split into three functional subsystems, namely, horizontal translation subsystem, vertical translation subsystem, and rotation subsystem. Then, for each subsystem, a disturbance observer is utilized to estimate the lumped effect of model uncertainties, external disturbances, and actuator faults, while a novel auxiliary system combined with the command prefilter is constructed to handle the physical constraints on actuators. Furthermore, sliding mode control is employed to design control commands for the three subsystems, sequentially. The proposed controller modifies the reference trajectories dynamically when one or more actuators become constrained, and can steer the AHV to the desired trim finally. Simulation results are provided to demonstrate the effectiveness of the designed controller.