Affiliation of Author(s):自动化学院
Journal:INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
Key Words:adaptive augmented observer fault diagnosis fault-tolerant control hypersonic flight vehicle multisensor faults
Abstract:This study proposes an improved adaptive fault diagnosis and compensation scheme for multisensor faults of hypersonic flight vehicles (HFVs). The faults are detected and isolated through a series of sensor output residuals and thresholds that consider observation error and disturbances. Via an adaptive augmented observer, the faults are estimated accurately and a time-varying disturbance is handled by an additional differential part. Sensor faults are compensated on the basis of estimation results, and disturbances are considered in the fault-tolerant control (FTC) design, thereby improving the tracking accuracy of the altitude and velocity and robustness with respect to external disturbances for HFVs. The stability of diagnosis and FTC is analyzed by Lyapunov theory. Numerical simulation results explain the validity of the proposed diagnosis and compensation methods.
ISSN No.:1049-8923
Translation or Not:no
Date of Publication:2019-11-25
Co-author:Gong, Jingxiu,Li, Yuqing
Correspondence Author:Fuyang Chen
Date of Publication:2019-11-25