Affiliation of Author(s):自动化学院
Journal:IEEE ACCESS
Key Words:Multi-sensor faults sliding mode control backstepping hypersonic flight vehicle fault diagnosis fault tolerance
Abstract:This paper presents a nonlinear fault-tolerant control (FTC) and sensor fault diagnosis for longitudinal dynamics of hypersonic flight vehicle. A nominal sliding mode control is developed to track the reference command of velocity and altitude on the basis of an affine nonlinear dynamic model. A nonlinear adaptive observer is proposed to estimate the fault in velocity system. The fault in altitude system is estimated using the coupling item as an estimation item through a backstepping sliding-mode observer to achieve an estimation performance better than that of the original adaptive observer. The estimation results are used to design a nonlinear FTC to compensate the multi-sensor faults. The stability of the controller is analyzed through Lyapunov theory. Numerical simulation results demonstrate the validity and robustness of the proposed controller and observer.
ISSN No.:2169-3536
Translation or Not:no
Date of Publication:2018-01-01
Co-author:Niu, Juan,Jiang, Gengqian
Correspondence Author:Fuyang Chen
Date of Publication:2018-01-01