Modeling and nonlinear control for air-breathing hypersonic vehicle with variable geometry inlet

Research output: Contribution to journalArticle

Abstract

This paper develops a control method for an air-breathing hypersonic vehicle with variable geometry inlet (AHV-VGI). For the AHV-VGI, a movable translating cowl is used to track the shock on lip conditions to capture enough air mass flow, which can ensure a more powerful thrust. Compared with traditional air-breathing hypersonic vehicle with fixed geometry inlet (AHV-FGI),
this AHV-VGI extends the velocity range, which is favorable to the acceleration and maneuvering flight. However, the VG causes the unknown changes of the aerodynamic forces, moment and the thrust in the meanwhile. Therefore, we firstly establish a longitudinal dynamic for AHV-VGI, which includes the uncertain changes induced by VGI. A conception of the optimal elongation
distance of translating cowl is introduced, and its estimated value is obtained by curve fitted approximation. And then, the control
process for AHV-VGI is divided into two subsystems. For each subsystem, a sliding mode controller is designed, and interval type-2 fuzzy logic systems (FLSs) are adopted to approximate nonlinear parts including the uncertain changes induced by VGI. Furthermore, uniformly stability of the whole system is proved by Lyapunov approach. Finally, simulation results demonstrate that
AHV have a better control performance under the condition of VGI compared to the FGI.

Bibliographical metadata

Original languageEnglish
Pages (from-to)422-432
Number of pages11
JournalAerospace Science and Technology
Volume67
Early online date28 Apr 2017
DOIs
StatePublished - Aug 2017