Oct 2026· IEEE Transactions on Circuits and Systems - II - Express Briefs· Vol 73, pp. 1064-1068· 0 citations· 16 references
Abstract
This brief proposes a generalized iterative learning disturbance observer (GILDO) to handle complex disturbances consisting of slowly-varying and multi-periodic components. The observer employs a hierarchical serial-parallel learning structure that incorporates multiple learning channels with distinct time delays and exploits historical information from different periods, thereby enabling simultaneous estimation of both slowly-varying and periodic components. A systematic parameter tuning method is also provided to ease practical implementation. The stability of the observer error system is proven, and the error transfer function is used to characterize the estimation performance at target frequencies and their harmonics. Experimental results on a PMSM drive system demonstrate that the proposed method achieves effective attenuation of speed ripples induced by slowly-varying and periodic disturbances, while retaining a relatively low observer bandwidth.
This paper proposes a state estimation scheme for nonlinear UAV systems subject to bounded disturbances and unknown dynamics. We introduce a Contracting Learning-Based Observer (CLBO) that integrates a contraction-guided observer with a long short-term memory (LSTM) module. Two learning strategies are developed: adapti...
Jia-Liang Fan, Cheng-Yan Zhao, Yu Zhou et al.· International Conference on...· 0 citations
To fulfill the dynamic and steady-state performance requirements of permanent magnet synchronous motors (PMSMs) in speed regulation, a practical prescribed-time fuzzy adaptive control approach is investigated. First, a novel continuously differentiable time-varying scaling function is constructed, which avoids the prob...
Tong Li, Jia-Peng Liu, Xin-Kai Chen et al.· IEEE Transactions on Automat...· 0 citations
In this paper, a fractional-order active disturbance rejection repetitive control (FADRRC) scheme is proposed for fractional-order time-delay systems. The unified control framework integrates a bandwidth-parameterized fractional extended state observer (FESO), modified repetitive control and a filtered Smith predictor....
Hui-Hua Jian, Hai-Zhen Wang, Jian-Hua Huang et al.· Fractal and Fractional· 0 citations
Trajectory tracking remains difficult for outdoor quadrotors exposed to aerodynamic disturbances. Thermal updrafts, wind fluctuations and vibration degrade tracking accuracy and limit what conventional disturbance-rejection strategies can compensate. This paper studies how residual disturbance learning improves robustn...
Mohammed Hamza Abib, Asma Mesmoudi· IEEE Access· 0 citations
Numerical simulations demonstrate superior tracking accuracy and disturbance rejection capability compared to conventional adaptive neural DSC without disturbance observers, validating the effectiveness and robustness of the proposed scheme.
Xian Pan, Dong-Xue Wang, You-Wu Liu et al.· PLoS ONE· 0 citations
