Abstract
In this paper, a novel neural network-based robust iterative learning fault estimation scheme is proposed to address the problem of fault modeling and estimation in nonlinear manipulator systems with disturbance and parameter uncertainties. The aim is to enhance the rapidity, efficiency, and accuracy of fault estimation. Firstly, the modeling for flexible manipulator control system is constructed as a preparation of iterative learning fault estimation observer design. Then, the neural network model is constructed to optimize the gain parameters of iterative learning fault estimator to approximate nonlinear uncertainties. Additionally, a \(H\mathrm {\infty }\) robust technique is used to suppress fault variation rate and disturbance, which enhances the speed of estimation and reduces the impact of disturbance. So that the estimated fault can rapidly and accurately track the actual fault over the whole time interval and iterations. Finally, numerical simulations are conducted to demonstrate the effectiveness of the proposed neural network-based robust iterative learning scheme.
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Acknowledgements
This work was supported in part by the National Natural Science Foundation of China (No. 61374134), in part by the Natural Science Foundation of Henan Province (No. 232300421149) and in part by the Postgraduate Cultivating Innovation and Quality Improvement Action Plan of Henan University (No. SYLYC2022081).
Funding
This work was supported in part by the National Natural Science Foundation of China (No. 61374134), in part by the Natural Science Foundation of Henan Province (No. 232300421149) and in part by the Postgraduate Cultivat ing Innovation and Quality Improvement Action Plan of Henan University (No. SYLYC2022081).
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Chen, Z., Huang, R., Ma, J. et al. Fault estimation for nonlinear uncertain systems utilizing neural network-based robust iterative learning scheme. Nonlinear Dyn 112, 6421–6438 (2024). https://doi.org/10.1007/s11071-024-09397-y
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DOI: https://doi.org/10.1007/s11071-024-09397-y