Hybrid Adaptive Dynamic Inverse Compensation for Incipient and Time-Varying Multi-faults of Morphing Fighter
摘要
This paper designs a hybrid adaptive fault-tolerant control (FTC) scheme for multi-disturbances and multi-faults with an incipient fault in nonlinear high mobility morphing fighter systems. For an affine model with engine vector tail-rudder inputs, the double-loop nominal nonlinear dynamic inversion (NDI) ensures stability under ideal conditions. Then, a multi-adaptive law sliding mode estimator accurately track the disturbances and reconstructs nominal NDI into a robust NDI scheme. Hence, a fault estimator with additional multi-adaptive laws calculates the fuselage-vector engine compound rudder faults with incipient and time-varying characteristics, where a bionic adaptive law mimics animal predation ensures estimator tracks incipient fault and eliminates disturbances. Finally, the fault-disturbance estimators switch the health nominal control into a variable-structure hybrid adaptive FTC mode and achieve the self-healing stable flight of the morphing system. Lyapunov theory proves the stability, and the digital simulation verifies the effectiveness.