Finite-time output tracking control for air-breathing hypersonic vehicles with actuator constraints. (December 2017)

• Record Type: Journal Article
• Authors: An, H; Xia, H; Wang, C
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 231:Number 14(2017)
• Page Start: 2578
• Page End: 2593
• Publication Date: 2017-12
• Subjects: Air-breathing hypersonic vehicles (AHVs) -- finite-time tracking -- input saturation -- nonsingularity and free-chattering -- feedback linearization; Aeronautics -- Periodicals; Astronautics -- Periodicals; Airplanes -- Design and construction -- Periodicals; Aerospace industries -- Periodicals; 629.1
• DOI: 10.1177/0954410016675894
• Languages: English
• ISSNs: 0954-4100

Abstract

This paper designs a finite-time output tracking controller for air-breathing hypersonic vehicles (AHVs) subjected to disturbances and actuator constraints. After proper derivations, the original model is divided into two independent subsystems undergoing mismatched lumped disturbance. A finite-time disturbance observer (FTDO) is employed to estimate the lumped disturbance, while an auxiliary system combined with a command pre-filter is designed to analyze the effect of input saturation caused by the restrained actuators. Based on the FTDO and the auxiliary system, a novel integral sliding surface is constructed and then a chattering-free nonsingular controller is developed to realize finite-time output tracking in spite of mismatched lumped disturbance and input saturation, which is its major merit compared with other existing AHV controllers. A simulation study is carried out to verify the proposed control scheme.