This article presents a fixed-time accommodation strategy of actuator faults for hypersonic gliding vehicles (HGVs). The approach against actuator faults is incorporated by sliding mode control (SMC), bilimit homogeneity, and adaptive techniques, with consideration of practical constraints and model uncertainties. The resulting fault-tolerant attitude control law allows the fault compensation to be completed in a fixed time, in view of the limited time available for recovery of a faulty HGV. The effectiveness of the presented scheme is validated by comparing it to the finite-time fault accommodation scheme. Note to Practitioners —Hypersonic vehicles have drawn significant interests due to the features of super-fast and flexible maneuverability. The use of advanced fault-tolerant control (FTC) techniques is expected to guarantee safety during hypersonic vehicle operation. A challenging problem is how to counteract actuator faults promptly and effectively in the presence of practical constraints and model uncertainties. This article presents a fixed-time FTC algorithm for a hypersonic gliding vehicle.

中文翻译：

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应用于高超音速滑翔飞行器的固定时间执行器故障调节

本文提出了高超音速滑翔飞行器 (HGV) 执行器故障的固定时间调节策略。考虑到实际约束和模型不确定性，通过滑模控制 (SMC)、双极限同质性和自适应技术结合了针对执行器故障的方法。鉴于可用于恢复故障 HGV 的时间有限，由此产生的容错姿态控制律允许在固定时间内完成故障补偿。通过将其与有限时间故障调节方案进行比较，验证了所提出方案的有效性。从业者须知 ——超音速飞行器以其超快、机动灵活的特点引起了人们的极大兴趣。使用先进的容错控制 (FTC) 技术有望保证高超音速飞行器运行期间的安全。一个具有挑战性的问题是如何在存在实际约束和模型不确定性的情况下迅速有效地抵消执行器故障。本文介绍了一种用于高超音速滑翔飞行器的固定时间 FTC 算法。