scholarly journals Improved Active Disturbance Rejection Control based on PSO for a Precise Rotating Servo System

2019 ◽  
Author(s):  
Zhenxin He ◽  
Jie Wang ◽  
Xiangyang Li ◽  
Zhili Zhang ◽  
Liang Li
Keyword(s):  
Disturbance Rejection ◽  
Servo System ◽  
Active Disturbance Rejection Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

Electro-hydraulic position servo system based on sliding mode active disturbance rejection compound control

2021 ◽  
pp. 095440622110282
Author(s):  
Zhang He ◽  
Zhao Jiyun ◽  
Wang Yunfei ◽  
Zhang Zhonghai ◽  
Ding Haigang ◽  
...  
Keyword(s):  
Disturbance Rejection ◽  
Control Method ◽  
Sliding Mode ◽  
Servo System ◽  
Active Disturbance Rejection Control ◽  
Compound Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Uncertain Disturbances ◽  
Position Servo

This study proposes a compound control method based on sliding mode and active disturbance rejection control to address the difficulty of controlling the cutting head for boom-type roadheader with parameter changes and uncertain disturbances. The fastest discrete tracking differentiator and extended state observer based on the traditional active disturbance rejection control are designed. Additionally, the controller of the sliding mode and active disturbance rejection control is constructed. Theoretical analysis indicates that the proposed controller ensures asymptotic stability, despite the existing uncertain disturbances. Moreover, a system based on AMESim and MATLAB/Simulink Co-simulation model is developed to further verify the performance of proposed algorithm. Compared with traditional active disturbance rejection control, proportional-integral-derivative(PID) and sliding mode control, co-simulation results demonstrate that the sliding mode active disturbance rejection compound control improves the tracking accuracy and robustness of the position servo system.

scholarly journals Active Disturbance Rejection Control of Valve-Controlled Cylinder Servo Systems Based on MATLAB-AMESim Cosimulation

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Wenxiao Guo ◽  
Yanbin Zhao ◽  
Ruiqin Li ◽  
Haigang Ding ◽  
Jianwei Zhang
Keyword(s):  
Disturbance Rejection ◽  
Servo System ◽  
Constant Load ◽  
Variable Load ◽  
Active Disturbance Rejection Control ◽  
Servo Systems ◽  
Large Power ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Load Variable

The valve-controlled cylinder position servo system has the advantages of large output force and large power. As characteristics of nonlinearity and uncertainty exist in the hydraulic servo system, it is difficult for the traditional PID control to meet the requirements of high precision and control. The active disturbance rejection control (ADRC) considers the uncertainty of the system and external disturbances as the total disturbance. In this paper, the valve-controlled cylinder servo system is designed based on ADRC, its working principle is described, and its mathematical model and cosimulation model based on MATLAB-AMESim are established. In the case of constant load, variable load, and long pipeline, the comparative simulation of ADRC and PID is carried out. The simulation results show that the ADRC can effectively suppress the disturbance of the internal parameter changes and external load changes of the hydraulic system and has strong robustness and high control accuracy. This study provides a reference for the application of ADRC in electrohydraulic servo systems.

scholarly journals A Novel Active Disturbance Rejection Control with a Super-Twisting Observer for the Rocket Launcher Servo System

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Di-Fen Shi ◽  
Yuan-Long Hou ◽  
Xiao-Hui Gu ◽  
Run-Min Hou
Keyword(s):  
Disturbance Rejection ◽  
Servo System ◽  
Phase Delay ◽  
Active Disturbance Rejection Control ◽  
Taylor’S Formula ◽  
Tracking Differentiator ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Control Accuracy ◽  
Taylor's Formula

In this paper, a novel active disturbance rejection control (NADRC) with a super-twisting extended state observer (SESO) is utilized in the rocket launcher servo system. The main arguments in the shipborne rocket launcher system are control accuracy and antidisturbance ability, which are closely related to phase delay and bandwidth. Firstly, we use Taylor’s formula approach to compensate the phase delay in traditional tracking differentiator (TD). Secondly, we design the parallel structured SESO to improve the observation bandwidth, so that it can estimate states with desired accuracy in NADRC. Finally, sinusoidal simulation results show Taylor’s formula-based TD can suppress noise and compensate phase delays effectively. In comparison with traditional ADRC, the proposed NADRC is shown to have better tracking performance and stronger robustness. Semiphysical experiments are conducted to prove the feasibility of NADRC.

scholarly journals Linear active disturbance rejection control for the electro-hydraulic position servo system

2021 ◽  
Vol 104 (1) ◽  
pp. 003685042110009
Author(s):  
Kunshan Jin ◽  
Jianli Song ◽  
Yongtang Li ◽  
Zhiqiang Zhang ◽  
Haibo Zhou ◽  
...  
Keyword(s):  
Disturbance Rejection ◽  
High Performance ◽  
Servo System ◽  
Active Disturbance Rejection Control ◽  
Integral Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Loading System ◽  
Proportional Integral Control ◽  
The Stability

Valve-controlled asymmetric cylinder is widely used in servo loading system. As a kind of typical electro-hydraulic servo system (EHSS), it inherently has the characteristics such as high order nonlinear, strong coupling, and uncertain, therefore, conventional control strategy is difficult to satisfy the requirements of high-performance control. In this paper, a novel linear active disturbance rejection control (LADRC) method was proposed, in which the internal and external disturbances were actively estimated by the third-order linear extended state observer (LESO) in real-time, and rejected by the control law of proportional integral control (PID) with acceleration feed-forward. The stability of the proposed method was proved, and the influence rules of the LADRC parameters on the control performance were revealed by simulation. Finally, comparative experiments between LADRC and PID control were carried out, results showed that the disturbances can be effectively compensated and the control goals can be successfully achieved with the proposed method.

A Fractional-Order Active Disturbance Rejection Controller Design for a PMSM Servo System

2021 ◽  
Author(s):  
Bolin Li ◽  
Pengchong Chen ◽  
Ying Luo
Keyword(s):  
Fractional Order ◽  
Disturbance Rejection ◽  
Controller Design ◽  
Tracking Error ◽  
Servo System ◽  
Parameter Tuning ◽  
Phase Constraint ◽  
Active Disturbance Rejection Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

Abstract This paper proposes a fractional-order active disturbance rejection controller (FOADRC) parameters tuning design method for a permanent magnet synchronous motor (PMSM) servo system with frequency-domain analysis of active disturbance rejection control. In this method, a fractional-order proportional derivative (FOPD) and a fractional-order [proportional derivative] (FO[PD]) controllers design combining with active disturbance rejection control (ADRC) are proposed. A systematic parameter tuning scheme is presented, and a flat phase constraint is applied as a design specification, which guarantees the phase is flat around the gain crossover frequency point, and the closed-loop system is robust to gain variations. The simulation results illustrate that the response of the PMSM servo system using FO[PD]-ADRC has a smaller overshoot, less tracking error, and better resistance to load disturbance than that using FOPD-ADRC.

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