Radial Position Control of a Bearingless Machine with Active Disturbance Rejection Control

2020 ◽  
Author(s):  
Werbet L. A. Silva ◽  
Andres O. Salazar ◽  
Ronaldo Jose N. Cabral Neto ◽  
Elmer R. L. Villarreal
Keyword(s):  
Disturbance Rejection ◽  
Position Control ◽  
Radial Position ◽  
Active Disturbance Rejection Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

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.

scholarly journals Research on variable mass control of series manipulator based on linear active disturbance rejection control

2020 ◽  
Vol 53 (7-8) ◽  
pp. 1194-1202
Author(s):  
Jianzhong Huang ◽  
Yuwan Cen
Keyword(s):  
Natural Frequency ◽  
Disturbance Rejection ◽  
Position Control ◽  
External Disturbance ◽  
Variable Mass ◽  
Hydraulic Cylinder ◽  
Active Disturbance Rejection Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Hydraulic Manipulator

The series manipulator of the demolition robot has different working postures and large self-weight so that the bearing mass of the joint hydraulic cylinder is a variable value, and the change of mass affects the dynamic characteristics of the valve-controlled hydraulic cylinder system. In this paper, an equivalent mass estimation method of the big-arm joint hydraulic cylinder is given, and the natural frequency range of the big-arm hydraulic cylinder-load system is calculated. In order to suppress the influence of the change of the natural frequency and external disturbance of the hydraulic cylinder on the system, the linear active disturbance rejection control is adopted in the closed-loop position control. The simulation results show that the change of load mass of the joint hydraulic cannot be ignored when designing the joint position controller of multi-joint hydraulic manipulator. And the simulation tests prove that the linear active disturbance rejection control strategy keeps good dynamic characteristic and steady-state accuracy for the change of natural frequency and external disturbance of hydraulic cylinder and has good tracking performance for periodic sinusoidal signal. Linear active disturbance rejection control is robust in the variable mass control of the manipulator and meets the requirements of the joint position control of the heavy-duty hydraulic manipulator.

Active Disturbance Rejection Control of a 2D MEMS Micromirror with Sidewall Electrodes

2016 ◽  
Vol 04 (01) ◽  
pp. 35-40
Author(s):  
Ping Liu ◽  
Weijie Sun ◽  
Zhendong Sun
Keyword(s):  
Angular Velocity ◽  
Disturbance Rejection ◽  
Position Control ◽  
External Disturbance ◽  
Main Idea ◽  
Active Disturbance Rejection Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Control Scheme ◽  
Torsional Micromirror

This study proposes the active disturbance rejection control (ADRC) for a second degree of freedom (2D) electrostatic torsional micromirror with sidewall electrodes. The main idea is to use the linear extended state observer (LESO) to estimate the external disturbance and the angular velocity of the micromirror, and a feedback controller is further applied to achieve the position control of the micromirror. The effectiveness of the LESO in the estimation of the external disturbance and angular velocity is demonstrated. The proposed novel control scheme provides the micromirror with high positioning accuracy and disturbance rejection.

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