scholarly journals A Decoupling Control Algorithm for Unwinding Tension System Based on Active Disturbance Rejection Control

2013 ◽  
Vol 2013 ◽  
pp. 1-18 ◽  
Author(s):  
Shanhui Liu ◽  
Xuesong Mei ◽  
Fanfeng Kong ◽  
Kui He
Keyword(s):  
Disturbance Rejection ◽  
Decoupling Control ◽  
Active Disturbance Rejection Control ◽  
System A ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Ideal Approach ◽  
Working Principle ◽  
Control Methodology ◽  
Printing Machine

This paper presents a new control methodology based on active disturbance rejection control (ADRC) for designing the tension decoupling controller of the unwinding system in a gravure printing machine. The dynamic coupling can be actively estimated and compensated in real time, which makes feedback control an ideal approach to designing the decoupling controller of the unwinding system. This feature is unique to ADRC. In this study, a nonlinear mathematical model is established according to the working principle of the unwinding system. A decoupling model is also constructed to determine the order and decoupling plant of the unwinding system. Based on the order and decoupling plant, an ADRC decoupling control methodology is designed to enhance the tension stability in the unwinding system. The effectiveness and capability of the proposed methodology are verified through simulation and experiments. The results show that the proposed strategy not only realises a decoupling control for the unwinding system but also has an effective antidisturbance capability and is robust.

Decoupling control of high-purity heat integrated distillation column process via active disturbance rejection control and nonlinear wave theory

2020 ◽  
Vol 42 (12) ◽  
pp. 2221-2233 ◽  
Author(s):  
Yun Cheng ◽  
Zengqiang Chen ◽  
Mingwei Sun ◽  
Qinglin Sun
Keyword(s):  
Nonlinear Wave ◽  
Control Strategy ◽  
High Purity ◽  
Disturbance Rejection ◽  
Distillation Column ◽  
Decoupling Control ◽  
Active Disturbance Rejection Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Control Scheme

Although the heat integrated distillation is an energy-efficient and environment-friendly separation technology, it has not been commercialized. One of the reasons is that the nonlinear dynamics and the interactions between various control loops have limited the performance of the traditional control strategy. To achieve a high-purity product concentration, a dynamic decoupling control strategy based on active disturbance rejection control (ADRC) is proposed. The effects of interactions, uncertainties and external disturbances can be estimated and rejected by using extended state observer. Considering the constraints on manipulated variables, an optimized ADRC is designed for the first-order system. Moreover, a concentration observer based on a nonlinear wave model is formulated to reduce the number of sensors. In the simulation research, the related internal model control (IMC), multi-loop ADRC and model predictive control (MPC) are compared with the proposed control scheme. The simulation results demonstrate the advantages of the proposed control scheme on tight control, decoupling performance and disturbance rejection for the high-purity heat integrated distillation column.

scholarly journals Active Disturbance Rejection Control of a Coupled-Tank System

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Fayiz Abukhadra
Keyword(s):  
Disturbance Rejection ◽  
Control Method ◽  
Time Varying ◽  
Active Disturbance Rejection Control ◽  
Process Industries ◽  
System A ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Tank System ◽  
The Time Domain

In process industries, liquid is pumped and stored in interacting coupled tanks. The liquid level in these tanks must be accurately controlled. This study aims to investigate the performance of the active disturbance rejection control method in controlling a coupled-tank system. A mathematical model of the coupled-tank system is derived to facilitate a simulation study. Assuming that the water level in the second tank is the only measured state, an extended observer with time-varying parameters estimates the second state and the total disturbances of the system. The system is then regulated using a time-varying feedback controller. The results show the effectiveness of the method in improving the time domain measures and the disturbance rejection compared to other controllers.

scholarly journals Neural Network Based Active Disturbance Rejection Control of a Novel Electrohydraulic Servo System for Simultaneously Balancing and Positioning by Isoactuation Configuration

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Qiang Gao ◽  
Yuanlong Hou ◽  
Kang Li ◽  
Zhan Sun ◽  
Chao Wang ◽  
...  
Keyword(s):  
Neural Network ◽  
Disturbance Rejection ◽  
Rbf Neural Network ◽  
External Disturbance ◽  
Nonlinear Behavior ◽  
Hydraulic Cylinder ◽  
Active Disturbance Rejection Control ◽  
System A ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

To satisfy the lightweight requirements of large pipe weapons, a novel electrohydraulic servo (EHS) system where the hydraulic cylinder possesses three cavities is developed and investigated in the present study. In the EHS system, the balancing cavity of the EHS is especially designed for active compensation for the unbalancing force of the system, whereas the two driving cavities are employed for positioning and disturbance rejection of the large pipe. Aiming at simultaneously balancing and positioning of the EHS system, a novel neural network based active disturbance rejection control (NNADRC) strategy is developed. In the NNADRC, the radial basis function (RBF) neural network is employed for online updating of parameters of the extended state observer (ESO). Thereby, the nonlinear behavior and external disturbance of the system can be accurately estimated and compensated in real time. The efficiency and superiority of the system are critically investigated by conducting numerical simulations, showing that much higher steady accuracy as well as system robustness is achieved when comparing with conventional ADRC control system. It indicates that the NNADRC is a very promising technique for achieving fast, stable, smooth, and accurate control of the novel EHS system.

scholarly journals A Modified LADRC-Based DC-Link Voltage Controller for Photovoltaic Grid-Connected Inverters

Electronics ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 877
Author(s):  
Xuesong Zhou ◽  
Qian Liu ◽  
Youjie Ma ◽  
Wei Li ◽  
Bingjie Xie
Keyword(s):  
Theoretical Analysis ◽  
Control Strategy ◽  
Disturbance Rejection ◽  
Active Disturbance Rejection Control ◽  
Extended State ◽  
System A ◽  
Active Disturbance Rejection ◽  
Voltage Controller ◽  
Disturbance Rejection Control ◽  
Pv Grid

To enhance the robust stability of the dc-link voltage in the photovoltaic (PV) grid-connected system, a modified linear active disturbance rejection control (LADRC)-based regulation strategy is presented in this paper. The proposed control strategy is equipped with the cascaded extended state observer, which can supplement the disturbance information not estimated by the conventional one, thereby achieving a relatively fast and accurate disturbance reconstruction. The tracking performance and disturbance rejection performance of the modified LADRC are discussed and studied in the frequency domain. Finally, the experimental results are provided to verify the theoretical analysis.

Sign in / Sign up

Export Citation Format

Share Document