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Fuzzy Adaptive Hybrid Compensation for Compound Faults of Hypersonic Flight Vehicle
Kaiyu Hu,Fuyang Chen,Zian Cheng 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.6
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 effectivenessof the proposed FTC scheme.
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Improved Adaptive Compensation of Variant Fighter With Multiple Faults via Extended Observer
Kaiyu Hu,Wenjing Sun,Zian Cheng 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.7
This research is devoted to devising a fault-tolerant control system to resolve the challenge of multi-fault automatic repair in variable-structure flight conditions of fighters. In the classical fighter system, the increment of the state parameter is used to represent the variable structure parameter. To illustrate the broad applicability of the following technique, Rudder and Sensor Gain Loss and Bias Faults are constructed. The Extended Observer is designed to simultaneously gauge faults, states, and disturbances. Furthermore, the harmonic functions is designed to quickly adapt to fighter configuration changes, time-varying disturbances, and to estimate all failures. Similar harmonic functions also appear in the design of fault self-healing algorithms, i.e., adaptive fault-tolerant controllers with variable-structure harmonic functions, simultaneously repairing gain loss and bias faults of rudder and sensors. Verification of the method’s effectiveness is achieved through semi-physical simulations, while the Lyapunov function function demonstrates the system’s stability.
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