Fixed-Time Adaptive Fuzzy Tracking Control for High-Order Uncertain Nonlinear Cyber-Physical Systems Under Malicious Attacks.

A new fixed-time adaptive fuzzy tracking control framework is proposed to resolve the fixed-time tracking control issue for a sort of nonlinear cyber–physical systems (CPSs), which subjugate to malignant attacks occurring in controller-actuator (C–A) channel. As a special point, the developed control architecture not only does not depend upon the accurate system model, but also can treat the exogenous perturbations and venomous attacks in unison. At the same time, distinct from the extant control studies for uncertain CPSs subject to malicious attacks which could only ensure the infinite-time or finite-time system performance, the presented control strategy owns the ability to assure the fixed-time system performance. Moreover, it has been theoretically substantiated that the developed control method can ensure that the output tracking error converges to a predefined slim region of the equilibrium point in fixed time, where both the regulation time and tracking precision degree are known beforehand and could be preconfigured by selecting the relative control design parameters suitably. In the last resort, we utilize two typical instances to illustrate the feasibility and effectiveness of our proposed approach.