Active disturbance rejection control for vibration displacement tracking system of continuous casting mold driven by servo motor

2017 ◽  
Author(s):  
Wenbo Zhang ◽  
Yiming Fang ◽  
Jianxiong Li ◽  
Zhuang Ma
Keyword(s):  
Continuous Casting ◽  
Disturbance Rejection ◽  
Tracking System ◽  
Active Disturbance Rejection Control ◽  
Servo Motor ◽  
Continuous Casting Mold ◽  
Vibration Displacement ◽  
Casting Mold ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

scholarly journals Adaptive Active Disturbance Rejection Control of Solar Tracking Systems with Partially Known Model

Mathematics ◽  
2021 ◽  
Vol 9 (22) ◽  
pp. 2871
Author(s):  
Sergio Isai Palomino-Resendiz ◽  
Norma Beatriz Lozada-Castillo ◽  
Diego Alonso Flores-Hernández ◽  
Oscar Octavio Gutiérrez-Frías ◽  
Alberto Luviano-Juárez
Keyword(s):  
Disturbance Rejection ◽  
Tracking System ◽  
Adaptive Observer ◽  
Identification System ◽  
Active Disturbance Rejection Control ◽  
Test Bed ◽  
Trajectory Tracking Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Solar Tracking

In this article, the trajectory tracking control of a solar tracking system is tackled by means of an adaptive active disturbance rejection control scheme. The state and disturbance estimation system is based on the combination of a time varying identification system and an adaptive observer. The stability and robustness of the controller is mathematically tested by means of the second method of Lyapunov, and its effectiveness is experimentally tested in a robotic test bed, achieving both lower energy consumption and better tracking results with respect to a PID-based controller.

scholarly journals Improved Active Disturbance Rejection Control of Dual-Axis Servo Tracking Turntable with Friction Observer

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 2012
Author(s):  
Qian Zhang ◽  
Xu Wu ◽  
Qunjing Wang ◽  
Dijiang Chen ◽  
Chao Ye
Keyword(s):  
Disturbance Rejection ◽  
Fuzzy Controller ◽  
Tracking System ◽  
Estimation Error ◽  
Pole Placement ◽  
Active Disturbance Rejection Control ◽  
Factors Affecting ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Servo Tracking

Friction nonlinear disturbance is one of the main factors affecting the control performance of servo tracking system. In this paper, an improved Active Disturbance Rejection Control (ADRC) scheme of dual-axis servo turntable is researched to achieve accurate tracking. Firstly, the mathematical dynamics model of dual-axis servo tracking turntable system is established. The Elastoplastic model is used to describe nonlinear friction, in which the immeasurable part is extended to be a new state. Secondly, considering the smooth and monotonic increasing property of hyperbolic tangent function, an improved tracking differentiator is introduced, which can provide better noise attenuation performance. Thirdly, based on adjustable parameter systematic pole placement method, the fuzzy control algorithm is applied to realize the intelligent tuning of the improved Extended State Observer (ESO) gains, in which the input of the fuzzy controller is the estimation error, while the output is the observer bandwidth. Finally, the improved ADRC system is transformed into a Lurie system, then the extended circle criteria are adopted to analyze the absolute stability of the proposed system. Simulation and experimental verification of the improved ADRC method for the dual-axis turntable tracking servo system are conducted. Results illustrate the effectiveness and robustness of the proposed controller.

Feedforward and Feedback Compound Control of Vibration Displacement for a Continuous Casting Mold Driven by a Servo Motor

2020 ◽  
Vol 18 (12) ◽  
pp. 3218-3228
Author(s):  
Qiang Li ◽  
Yi-ming Fang ◽  
Jian-xiong Li ◽  
Wen-jian Zhang
Keyword(s):  
Continuous Casting ◽  
Servo Motor ◽  
Continuous Casting Mold ◽  
Vibration Displacement ◽  
Casting Mold ◽  
Compound Control

Fuzzy active disturbance rejection control of fine tracking system for free space optical communication

2015 ◽  
Vol 23 (5) ◽  
pp. 1394-1400
Author(s):  
崔宁 CUI Ning ◽  
陈兴林 CHEN Xing-lin ◽  
曹开锐 CAO Kai-rui ◽  
于志亮 YU Zhi-liang ◽  
徐川川 XU Chuan-chuan
Keyword(s):  
Optical Communication ◽  
Free Space ◽  
Disturbance Rejection ◽  
Tracking System ◽  
Active Disturbance Rejection Control ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Space Optical Communication
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