Fixed-Time Incremental Fault-Tolerant Control for Aircraft with Control Surface Failures

Le résumé fourni par la source

Control surface failures in aircraft pose a severe threat to flight safety, demanding high-performance fault-tolerant control. While incremental nonlinear dynamic inversion control exhibit robustness, they rely on state derivatives that are difficult to obtain accurately and have uncertain convergence times, failing to provide strict temporal guarantees for faulty system recovery. To address this issue, a fixed-time-based incremental fault-tolerant control method for aircraft with control surface failures is proposed. First, an improved tracking differentiator is designed to extract differential signals accurately with enhanced noise immunity, effectively resolving the challenge of obtaining accurate angular acceleration signals. On this basis, a fixed-time-based incremental nonlinear dynamic inversion fault-tolerant controller is proposed, whose tracking errors are rigorously proven to converge within a fixed time independent of initial states via Lyapunov theory. Simulations demonstrate that under hybrid control surface failures, the proposed method ensures rapid stabilization and superior command tracking within a fixed time, exhibiting excellent control performance and robustness, which meets the rapid stabilization requirements of aircraft after control surface failures.

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