scholarly journals An Advanced Control and Extensible Configuration for Static Var Generator

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Chao Zhang ◽  
Aimin Zhang ◽  
Ying Cui ◽  
Tao Wen
Keyword(s):  
Disturbance Rejection ◽  
Reactive Power ◽  
Dynamic Performance ◽  
Fast Response ◽  
Pi Controller ◽  
Disturbance Rejection Control ◽  
Power Modules ◽  
Advanced Control ◽  
Static Var Generator ◽  
Transient And Steady State

An extensible configuration is proposed for static var generator (SVG) with advanced controller included for reactive power compensation of grid. Compared with the traditional configurations, the major advantage of such system configuration is that the power modules are very flexible and easy to extend or reduce without changing the main equipment of SVG under the different voltage levels. Furthermore, in order to solve the problems of modeling uncertainty, nonlinearities, and outside disturbance by using proportion integration (PI) controller, an advanced controller is proposed based on auto disturbance rejection control (ADRC). By controlling the amount and direction of reactive current, the reactive power is generated or absorbed from SVG into power grid with fast response, which can realize the excellent dynamic compensation for both the internal and external interferences. Simulations results show that the proposed controller has better performance of the transient and steady state than PI controller. Moreover, the verification tests are executed in 380 V, 6.5 kVA experiment systems, suggesting that the excellent dynamic performance and strong robustness are achieved.

Design of Missile Autopilot with Aerodynamic Lift and Reaction Jets Based on Auto Disturbance Rejection Controller

2012 ◽  
Vol 472-475 ◽  
pp. 1036-1039
Author(s):  
Chong Yang ◽  
Ke Zhang ◽  
Mei Bai Lu
Keyword(s):  
Disturbance Rejection ◽  
Response Speed ◽  
Fast Response ◽  
Urgent Problem ◽  
Robust Performance ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Lateral Pulse Jet ◽  
Aerodynamic Lift ◽  
Pulse Jet

First a new autopilot design model is presented for the interceptor missile with the blended aerodynamic lift and reaction jet. The reaction jet can improve the response speed, but the structure of control system becomes more complex. Therefore how to design control strategy properly is an urgent problem. Second, considering the discrete property of the lateral pulse jet thrusters and the continuous property of the aerodynamic fins, a kind of ADRC (active disturbance rejection control) autopilot system was designed for the aerodynamic lift/reaction jet missile. Finally, through a testing in the simulation of MATLAB, it is shown that, due to the sufficient utilization of the reaction jet, there is a significant improvement in the fast response and robust performance of the proposed controller. It is applicable to design the autopilot of aerodynamic lift and reaction jet blended missile.

An Efficient Control Implementation for Inverter Based Harmony Search Algorithm

2017 ◽  
Vol 8 (1) ◽  
pp. 279
Author(s):  
Mushtaq Najeeb ◽  
Hamdan Daniyal ◽  
Ramdan Razali ◽  
Muhamad Mansor
Keyword(s):  
Optimization Algorithm ◽  
Search Algorithm ◽  
Dynamic Performance ◽  
Harmony Search ◽  
Absolute Error ◽  
Fast Response ◽  
Pi Controller ◽  
Harmony Search Algorithm ◽  
Voltage Source ◽  
Output Performance

This research implements a PI controller based on harmony search (HS) optimization algorithm for voltage source inverter to improve the output performance under step load change conditions. The HS algorithm aims to handle the trial and error procedure used in finding the PI parameters and then apply the proposed control algorithm via the eZdsp TMS320F28355 board to link the inverter prototype with the Matlab Simulink. The mean absolute error (MAE) is used as an optimization problem to minimize the output voltage error for the developed controller (PI-HS) as compared to the PI controller based particale swarm optimization algorithm (PI-PSO). Based on the experimental results obtained, it is noted that the proposed controller (PI-HS) provides a good dynamic performance, robustness, constant voltage amplitude, and fast response in terms of overshoot, transient, and steady-state.

scholarly journals Attitude Active Disturbance Rejection Control of the Quadrotor and Its Parameter Tuning

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Suiyuan Shen ◽  
Jinfa Xu
Keyword(s):  
Flight Control ◽  
Disturbance Rejection ◽  
Sliding Mode ◽  
Dynamic Performance ◽  
External Disturbance ◽  
Parameter Tuning ◽  
Adaptive Genetic Algorithm ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Better Than

The internal uncertainty and external disturbance of the quadrotor will have a significant impact on flight control. Therefore, to improve the control system’s dynamic performance and robustness, the attitude active disturbance rejection controller (ADRC) of the quadrotor is established. Simultaneously, an adaptive genetic algorithm-particle swarm optimization (AGA-PSO) is used to optimize the controller parameters to solve the problem that the controller parameters are difficult to tune. The performance of the proposed ADRC is compared with that of the sliding mode controller (SMC). The simulations revealed that the dynamic performance and robustness of the ADRC is better than that of the SMC.

Smooth Switching Design/Implementation of the Active Disturbance Rejection Control

2017 ◽  
Author(s):  
Shen Zhao ◽  
Dan Morris ◽  
Zhiqiang Gao
Keyword(s):  
Disturbance Rejection ◽  
Order System ◽  
Control Algorithms ◽  
Active Disturbance Rejection Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Advanced Control ◽  
Aerial Vehicle ◽  
Smooth Switching ◽  
System With Time Delay

Although active disturbance rejection control (ADRC) has demonstrated promising results in many applications, in some safety critical applications e.g. power plant, unmanned aerial vehicle, etc., it is often reluctant to switch from an existing control algorithm, either the traditional PID controller or other advanced control algorithms, to a new one. If the switching between the control algorithms can be made seamless, many more opportunities may open up. In this paper, the problem of making the switching to the ADRC smooth is studied. Previous attempts to solve the problem are not thorough enough, since only a second order system was addressed. A very simple and effective method is proposed based on analysis to make the transition seamless. The solution is very general, and can be applied to system of any order or even system with time-delay. At the core of the solution is the initialization of the “total disturbance”.

Active Disturbance Rejection Control in Airborne Direct Drive Electro Mechanical Actuator Application

2014 ◽  
Vol 551 ◽  
pp. 541-547
Author(s):  
He Song Liu ◽  
Yong Ling Fu ◽  
Juan Chen ◽  
Hui Chen
Keyword(s):  
Disturbance Rejection ◽  
Position Control ◽  
Dynamic Performance ◽  
Active Disturbance Rejection Control ◽  
Control Performance ◽  
Direct Drive ◽  
Active Disturbance Rejection ◽  
Load Disturbance ◽  
Disturbance Rejection Control ◽  
Actuator Application

A novel active disturbance rejection control (ADRC) strategy is presented to improve position control performance of airborne direct drive electro-mechanical actuator (EMA). To begin with, kinematics model of the direct drive EMA is deduced for simulation benefits. Then, an ADRC controller is designed to implement the position control. Finally, simulation work is put forward to verify the steady-state precision, dynamic performance and load disturbance rejection ability, accounting for over-running load. The results verify that the ADRC-based EMA servo system is fast, precise, of no overshoot and strongly robust to load disturbance.

Research on Active Disturbance Rejection Control Strategy of Static Reactive Power Generator

2015 ◽  
Vol 1092-1093 ◽  
pp. 316-320
Author(s):  
Jing Bai ◽  
Yu Zhang ◽  
Hui Da Duan ◽  
Shi Qi Lu ◽  
Chao Chao Li ◽  
...  
Keyword(s):  
Control Strategy ◽  
Pid Control ◽  
Disturbance Rejection ◽  
Control Algorithm ◽  
Reactive Power ◽  
Error Feedback ◽  
Power Generator ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Nonlinear State

For the shortcomings of large overshoot and poor anti-disturbance ability when using the traditional PID control, ADRC control algorithm that is a nonlinear state error feedback control algorithm has been proposed in the sophisticated control system of static reactive power generator. The simulation results show that the algorithm can make the system reactive power compensation more quickly and more effectively, therefore the control strategy is feasible.

scholarly journals Position Control with ADRC for a Hydrostatic Double-Cylinder Actuator

Actuators ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 112
Author(s):  
Bin Wang ◽  
Hengyu Ji ◽  
Rui Chang
Keyword(s):  
Disturbance Rejection ◽  
Position Control ◽  
Dynamic Performance ◽  
Control Performance ◽  
Fuzzy Pid ◽  
System A ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Actuation Scheme ◽  
Hose Model

A compact and flexible hydraulic double-cylinder actuation scheme is proposed for use in applications, especially where power density is extremely demanding. In view of flexible amounting requirements, long and thin hoses were utilized to connect two cylinders. Affecting the actuation preciseness, volume variation of the hoses caused by pressurized oil and bubbles was the main problem the system encountered. In this study, an active disturbance rejection control (ADRC) strategy was adopted for the improvement of displacement control performance under uncertain external load. After the experimental verification of the necessity of a hose model for the system, a centralized-parameter hose model was constructed where the coefficients are determined on the basis of the experimental data. Additionally, the system and the controller proposed were mathematically modeled. Simulation results shows that the system using ADRC exhibited higher displacement accuracy and better dynamic performance than that using PID (Proportion-Integral-Derivative) or fuzzy PID. ADRC has a stronger disturbance rejection ability. ADRC is an effective solution to nonlinear control of systems with uncertain parameters or various loads.

scholarly journals The decoupled vector-control of PMSM based on nonlinear multi-input multi-output decoupling ADRC

2020 ◽  
Vol 12 (12) ◽  
pp. 168781402098425
Author(s):  
Yihua Liu ◽  
Jiayi Wen ◽  
Dacheng Xu ◽  
Zhijian Huang ◽  
Hong Zhou
Keyword(s):  
Vector Control ◽  
Disturbance Rejection ◽  
Pid Controller ◽  
Dynamic Performance ◽  
Permanent Magnet Synchronous Motor ◽  
Factorization Approach ◽  
First Order ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Measured Time

The Permanent Magnet Synchronous Motor (PMSM) is widely used in many fields. Aiming at nonlinearity, strong coupling and uncertainty of the PMSM, this paper proposes a nonlinear multi-input multi-output (MIMO) decoupling PMSM algorithm based on Active Disturbance Rejection Control (ADRC). A Lower-Upper matrix factorization approach is introduced to solve a general inverse of the measured time-varying matrix in real-time decoupling ADRC. This PMSM is based on the vector control. First, the PMSM model and vector control are simulated. Then, a first-order ADRC is introduced and used to replace the PID controller in the d and q axis of PMSM respectively. The simulation shows that the replaced system has a smaller fluctuation, faster response and better stability. Finally, the nonlinear MIMO decoupling ADRC and its inverse matrix method are deduced. Then, the decoupling PMSM control based on ADRC is verified. The simulation shows that this system has a better static and dynamic performance, and it conforms to the PMSM characteristics better. All this shows that the nonlinear MIMO decoupling ADRC is a better strategy for the PMSM. The presented algorithm also has advantage in method compared with some recent results of decoupling PMSM control.

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