Active Disturbance Rejection Control Of The Novel Variable Speed Direct Drive Pumping System

2021 ◽  
Author(s):  
Haigang Ding ◽  
Yanbin Zhao ◽  
Robin ◽  
Ziwen Sang ◽  
Chengcheng Yang
Keyword(s):  
Disturbance Rejection ◽  
Active Disturbance Rejection Control ◽  
The Novel ◽  
Variable Speed ◽  
Direct Drive ◽  
Pumping System ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

Innovative design and gearshift control for direct-drive electromagnetic gearshift system equipped with servo synchronizer

2018 ◽  
Vol 233 (5) ◽  
pp. 1115-1124 ◽  
Author(s):  
Bo Li ◽  
Wenqing Ge ◽  
Xiao Yu ◽  
Shilei Shao ◽  
Haitao Liu
Keyword(s):  
Disturbance Rejection ◽  
Driving Force ◽  
Control Method ◽  
Mechanical Transmission ◽  
Active Disturbance Rejection Control ◽  
Proportional Integral Derivative ◽  
Direct Drive ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
And Control

Automated mechanical transmission has many advantages such as simple structure, high mechanical efficiency, and low cost. But the poor gearshift performance restricts the massive application of the automated mechanical transmission, and it can be improved through innovation of structure and control. To reduce the requirement of shift force and improve the shift performance, a new direct-drive electromagnetic gearshift system which consists of servo synchronizer and 2-degree-of-freedom electromagnetic actuator is adopted. The specific structure and working principle of the gearshift system including servo synchronizer are described, and the equation of force-amplifying ratio is deduced. Due to the complexity of the gearshift system and uncertainties of the gearshift process, active disturbance rejection control method is designed. The active disturbance rejection controller can eliminate the nonlinearity of the 2-degree-of-freedom actuator. The extended state observer can estimate and compensate the uncertainties, parameter variations, and external disturbances. Simulations are carried out, and the result comparison with proportional–integral–derivative controller indicates the superiority of the active disturbance rejection control method. Test bench and control system are developed to verify the performance of the newly designed system and control method. The experimental results show that, when the gearshift system is equipped with servo synchronizer, the driving force and the maximum volatility of driving force can be reduced by 35% and 5%, respectively, and the impact generated by active disturbance rejection control method is reduced by 36% compared with proportional–integral–derivative method. The new gearshift system achieves a better gearshift performance. Combined with the newly designed control strategy, the direct-drive electromagnetic gearshift system provides a new solution for automated mechanical transmission applications.

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 Improved Sliding Mode-Active Disturbance Rejection Control of Electromagnetic Linear Actuator for Direct-Drive System

Actuators ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 138
Author(s):  
Yingtao Lu ◽  
Cao Tan ◽  
Wenqing Ge ◽  
Bo Li ◽  
Jiayu Lu
Keyword(s):  
Sliding Mode Control ◽  
Disturbance Rejection ◽  
Sliding Mode ◽  
Linear Actuator ◽  
Active Disturbance Rejection Control ◽  
Direct Drive ◽  
Mode Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Electromagnetic Linear Actuator

The electromagnetic linear actuator is used as the core drive unit to achieve high precision and high response in the direct-drive actuation system. In order to improve the response performance and control accuracy of the linear drive unit, an improved sliding mode-active disturbance rejection control (ISM-ADRC) method was proposed. A motor model was established based on improved LuGre dynamic friction. The position loop adopts the improved integral traditional sliding mode control based on an extended state observer, and the current loop adopts PI control. The stability of the system is verified based on the Lyapunov theory. A nonlinear dilated state observer is used to effectively observe the electromagnetic linear actuator position and velocity information while estimating and compensating the internal and external uncertainty perturbations. At the same time, the saturation function sat(s) is used to replace the sign(s) and introduce the power function of the displacement error variable. The improved integral sliding mode control law further improves the response speed and control accuracy of the controller while reducing the jitter inherent in the conventional sliding mode. Simulation and experimental data show that the proposed improved sliding mode-active disturbance rejection control reduces the 8-mm step response time of the electromagnetic linear actuator by 21.9% and the steady-state error by less than 0.01 mm compared with the conventional sliding-mode control, while the system has 49.4% less adjustment time for abrupt load changes and is more robust to different loads and noise.

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