Adaptive diagnosis and compensation for hypersonic flight vehicle with multisensor faults. (23rd August 2019)

• Record Type: Journal Article
• Authors: Chen, Fuyang; Gong, Jingxiu; Li, Yuqing
• Is Part Of: International journal of robust and nonlinear control. Volume 29:Number 17(2019)
• Page Start: 6145
• Page End: 6163
• Publication Date: 2019-08-23
• Subjects: adaptive augmented observer -- fault diagnosis -- fault‐tolerant control -- hypersonic flight vehicle -- multisensor faults; Automatic control -- Periodicals; Control theory -- Periodicals; Nonlinear systems -- Periodicals; 629.836
• DOI: 10.1002/rnc.4711
• Languages: English
• ISSNs: 1049-8923

Abstract

Summary: 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.