Abstract
This work researches the issue of adaptive fault-tolerant fuzzy tracking control for a class of nonlinear systems in strict-feedback form with quantized inputs. The fuzzy logic systems are utilized to approximate unknown functions, and a fuzzy state observer is built to estimate the unavailable states. Meanwhile, an improved hysteresis quantizer is introduced to achieve the quantized inputs for saving communication resources. To improve the approximation capacities of fuzzy logic systems, the compensated tracking errors and the prediction errors are used to construct the adaptive laws parameters. Furthermore, a composite adaptive fault-tolerant fuzzy control strategy is developed, which can guarantee proper operations of the systems when encountering actuator faults, and overcome the issue of “explosion of complexity” in the backstepping approach. It is strictly demonstrated that the system output can follow a desired signal within a small error zone and all signals of the closed-loop system are bounded. Finally, the simulation results are given to confirm the validity of the presented control strategy.








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This work was partially supported by the National Natural Science Foundation of China, under Grant 62203064.
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Huang, Z., Niu, B., Zhao, N. et al. State Observer-Based Composite Adaptive Fault-Tolerant Fuzzy Control for Uncertain Nonlinear Systems with Quantized Inputs. Int. J. Fuzzy Syst. 26, 1664–1680 (2024). https://doi.org/10.1007/s40815-024-01696-1
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DOI: https://doi.org/10.1007/s40815-024-01696-1