Active Disturbance Rejection Control Based on Extended State Observer for Three-Phase Battery Energy Storage Power Conversion System with LCL Filter

2022 ◽  
Author(s):  
Ning Gao ◽  
Xin Lin ◽  
Song Lu ◽  
Yue Xia ◽  
Weimin Wu
Keyword(s):  
Disturbance Rejection ◽  
Power Conversion ◽  
Active Disturbance Rejection Control ◽  
Extended State ◽  
Battery Energy Storage ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Three Phase ◽  
Conversion System ◽  
Battery Energy

scholarly journals High-Order Sliding Mode-Based Fixed-Time Active Disturbance Rejection Control for Quadrotor Attitude System

Electronics ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 357 ◽  
Author(s):  
Chunlin Song ◽  
Changzhu Wei ◽  
Feng Yang ◽  
Naigang Cui
Keyword(s):  
Disturbance Rejection ◽  
Sliding Mode ◽  
Fixed Time ◽  
High Order ◽  
Extended State Observer ◽  
Active Disturbance Rejection Control ◽  
Extended State ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Control Scheme

This article presents a fixed-time active disturbance rejection control approach for the attitude control problem of quadrotor unmanned aerial vehicle in the presence of dynamic wind, mass eccentricity and an actuator fault. The control scheme applies the feedback linearization technique and enhances the performance of the traditional active disturbance rejection control (ADRC) based on the fixed-time high-order sliding mode method. A switching-type uniformly convergent differentiator is used to improve the extended state observer for estimating and attenuating the lumped disturbance more accurately. A multivariable high-order sliding mode feedback law is derived to achieve fixed time convergence. The timely convergence of the designed extended state observer and the feedback law is proved theoretically. Mathematical simulations with detailed actuator models and real time experiments are performed to demonstrate the robustness and practicability of the proposed control scheme.

scholarly journals Novel Active Disturbance Rejection Control Based on Nested Linear Extended State Observers

2020 ◽  
Vol 10 (12) ◽  
pp. 4069
Author(s):  
Wameedh Riyadh Abdul-Adheem ◽  
Ahmad Taher Azar ◽  
Ibraheem Kasim Ibraheem ◽  
Amjad J. Humaidi
Keyword(s):  
Disturbance Rejection ◽  
Estimation Error ◽  
Tracking Error ◽  
Rate Of Change ◽  
Estimation Accuracy ◽  
Active Disturbance Rejection Control ◽  
Extended State ◽  
Single Input Single Output ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

In this paper, a Novel Active Disturbance Rejection Control (N-ADRC) strategy is proposed that replaces the Linear Extended State Observer (LESO) used in Conventional ADRC (C-ADRC) with a nested LESO. In the nested LESO, the inner-loop LESO actively estimates and eliminates the generalized disturbance. Increasing the bandwidth improves the estimation accuracy which may tolerate noise and conflict with H/W limitations and the sampling frequency of the system. Therefore, an alternative scenario is offered without increasing the bandwidth of the inner-loop LESO provided that the rate of change of the generalized disturbance estimation error is upper bounded. This was achieved by the placing of an outer-loop LESO in parallel with the inner one that estimates and eliminates the remaining generalized disturbance originating from the inner-loop LESO due to bandwidth limitations. The stability of LESO and nested LESO was investigated using Lyapunov stability analysis. Simulations on uncertain nonlinear single-input-single-output (SISO) system with time-varying exogenous disturbance revealed that the proposed nested LESO could successfully deal with a generalized disturbance in both noisy and noise-free environments, where the Integral Time Absolute Error (ITAE) of the tracking error for the nested LESO was reduced by 69.87% from that of the LESO.

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