Design of closed loop control for disturbance rejection in oscillatory system based on PICS and Magnitude Optimum

2015 ◽  
Author(s):  
Shanta Sondur ◽  
Bhanumati Bandi
Keyword(s):  
Disturbance Rejection ◽  
Closed Loop ◽  
Oscillatory System ◽  
Closed Loop Control ◽  
Loop Control

Double closed-loop control of converter based on active disturbance rejection

2021 ◽  
Author(s):  
Hongyi Peng ◽  
Ruoyan Pan ◽  
Zhimin Zhang ◽  
Zhen Li ◽  
Xiao Zhu ◽  
...  
Keyword(s):  
Disturbance Rejection ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Loop Control ◽  
Active Disturbance Rejection

scholarly journals Research on D-STATCOM Double Closed-Loop Control Method Based on Improved First-Order Linear Active Disturbance Rejection Technology

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3958
Author(s):  
Youjie Ma ◽  
Xiaotong Sun ◽  
Xuesong Zhou
Keyword(s):  
Disturbance Rejection ◽  
Closed Loop ◽  
Reactive Power ◽  
Control Method ◽  
Reactive Power Compensation ◽  
The State ◽  
Closed Loop Control ◽  
Loop Control ◽  
State Variable ◽  
Active Disturbance Rejection

The application of a distribution static synchronous compensator (D-STATCOM) is the best technical means to solve the problem of reactive power compensation and harmonics. The D-STATCOM system has the characteristics of variable parameters, strong coupling, nonlinearity and multi-variability. In order to improve the speed of the dynamic tracking response and anti-disturbance capability of the D-STATCOM, the article proposes an improved Linear Active Disturbance Rejection Controller (LADRC) based on the total disturbance deviation control method. Combined with double closed-loop control, the inner loop takes the current as the state variable, and the outer loop uses the DC side output voltage as the state variable to achieve robust stability of the D-STATCOM and controller output. The simulation results show that the improved LADRC is more stable than the traditional LADRC in controlling the DC voltage waveform of the compensator, reactive current tracking and reactive power compensation waveform when it is disturbed, which verifies the superiority and feasibility of the improved LADRC.

scholarly journals Dual Closed-Loop Linear Active Disturbance Rejection Control of Grid-Side Converter of Permanent Magnet Direct-Drive Wind Turbine

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1090 ◽  
Author(s):  
Youjie Ma ◽  
Xia Yang ◽  
Xuesong Zhou ◽  
Luyong Yang ◽  
Yongliang Zhou
Keyword(s):  
Permanent Magnet ◽  
Wind Power ◽  
Disturbance Rejection ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Direct Drive ◽  
Loop Control ◽  
Disturbance Rejection Control ◽  
Dc Bus ◽  
Bus Voltage

In the permanent magnet direct-drive wind power grid-connected system, in order to solve the coupling problem between d -axis and q -axis currents and to improve the disturbance rejection performance of direct current (DC) bus voltage under grid faults, a new dual closed-loop structure based on linear active disturbance rejection control (LADRC) is proposed. This new dual closed-loop control includes current inner loop decoupling control and DC bus voltage outer loop control with first-order LADRC. As the LADRC has the advantages of decoupling and disturbances rejection, it is applied to the control of wind power grid-connected inverter. Through analysis, it is demonstrated that the current decoupling control is simpler than proportional integral (PI) control algorithm, the dynamic response speed is faster, and the DC bus voltage control has better anti-disturbance. Finally, a 1.5 MW direct-drive permanent magnet wind power system was established through digital simulation, and the control effects of the two control modes under different working conditions are compared. The simulation results verify that the proposed dual closed-loop control based on first-order LADRC is superior to PI double closed-loop control in terms of decoupling performance and disturbance rejection performance under grid faults.

The Impact of Visual Feedback Type on the Mastery of Visuo-Motor Transformations

2012 ◽  
Vol 220 (1) ◽  
pp. 3-9 ◽  
Author(s):  
Sandra Sülzenbrück
Keyword(s):  
Empirical Research ◽  
Visual Feedback ◽  
Closed Loop ◽  
Motor Planning ◽  
Visual Input ◽  
Closed Loop Control ◽  
Loop Control ◽  
Feedback Type ◽  
Effective Use ◽  
The Impact

For the effective use of modern tools, the inherent visuo-motor transformation needs to be mastered. The successful adjustment to and learning of these transformations crucially depends on practice conditions, particularly on the type of visual feedback during practice. Here, a review about empirical research exploring the influence of continuous and terminal visual feedback during practice on the mastery of visuo-motor transformations is provided. Two studies investigating the impact of the type of visual feedback on either direction-dependent visuo-motor gains or the complex visuo-motor transformation of a virtual two-sided lever are presented in more detail. The findings of these studies indicate that the continuous availability of visual feedback supports performance when closed-loop control is possible, but impairs performance when visual input is no longer available. Different approaches to explain these performance differences due to the type of visual feedback during practice are considered. For example, these differences could reflect a process of re-optimization of motor planning in a novel environment or represent effects of the specificity of practice. Furthermore, differences in the allocation of attention during movements with terminal and continuous visual feedback could account for the observed differences.

118-LB: Glucose Variability throughout the Menstrual Cycle on Closed-Loop Control in Type 1 DM

Diabetes ◽  
2019 ◽  
Vol 68 (Supplement 1) ◽  
pp. 118-LB
Author(s):  
CAROL J. LEVY ◽  
GRENYE OMALLEY ◽  
SUE A. BROWN ◽  
DAN RAGHINARU ◽  
YOGISH C. KUDVA ◽  
...  
Keyword(s):  
Menstrual Cycle ◽  
Closed Loop ◽  
Glucose Variability ◽  
Closed Loop Control ◽  
Loop Control ◽  
Type 1 Dm
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