|Fuzzy Adaptive Hybrid Compensation for Compound Faults of Hypersonic Flight Vehicle
Kaiyu Hu, Fuyang Chen*, and Zian Cheng
International Journal of Control, Automation, and Systems, vol. 19, no. 6, pp.2269-2283, 2021
Abstract : Based on the adaptive control technique, this study investigates the active-passive hybrid fault-tolerant control (FTC) for hypersonic flight vehicles (HFVs) with compound faults, including system and actuator faults. System and actuator compound faults are defined in multi-augmented Takagi-Sugeno fuzzy HFV systems. Indirect passive compensation factors shield the system faults. An observer with adaptive learning rates that combine fault magnitude and fuzzy premise variable is then designed to estimate actuator faults, where a novel bionic variable parameter algorithm improves the sensitivity and accuracy of fault estimation to the incipient fault deviations. Hence the fault-tolerant controller actively compensates for the actuator faults by using estimated information while shielding the system faults. Finally, the improved adaptive active-passive hybrid FTC for compound faults are completed, and the system’s robust stability is proven. Simulation results are provided to illustrate the effectiveness of the proposed FTC scheme.
Keyword : Compound faults, hybrid fault-tolerant control, hypersonic flight vehicle, robust stability.