Auto Disturbance Rejection Control Strategy for Large Inertia Servo System

2014 ◽  
Vol 599-601 ◽  
pp. 841-846
Author(s):  
Ke Zhang ◽  
Long Xu Jin
Keyword(s):  
Control Strategy ◽  
Disturbance Rejection ◽  
Control Plant ◽  
Servo System ◽  
Torque Ripple ◽  
System Response ◽  
Feedback Gain ◽  
Control Performance ◽  
Nonlinear Feedback ◽  
Disturbance Rejection Control

For large inertia servo system, improving the system response speed and control precision has always been a difficulty. This paper presents an improved auto disturbance rejection control (ADRC) strategy, which has good control performance for this kind of system. Firstly, transition process is arranged for input signal, which can solve the contradiction between overshoot and rapidity, can also increase the regulation range of feedback gain; secondly, linear extended state observer is designed to identify load changes and other fluctuations; then, for the control plant after observation compensation, a nonlinear feedback controller is designed to obtain better control performance and better disturbance rejection capability. The simulation results show that, compared with the traditional PI controller, with the control strategy suggested in this paper the system has rapid response but very little overshoot, and has strong ability to suppress interference. The design of this controller is simple, easy to implement in Engineering, so it may have important reference value for this kind of large inertia system. Keywords: servo control; large inertia; auto disturbance rejection control; torque ripple; low speed

scholarly journals A Control Method for IPMSM Based on Active Disturbance Rejection Control and Model Predictive Control

Mathematics ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 760
Author(s):  
Fang Liu ◽  
Haotian Li ◽  
Ling Liu ◽  
Runmin Zou ◽  
Kangzhi Liu
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
Duty Cycle ◽  
Control Strategy ◽  
Disturbance Rejection ◽  
Torque Ripple ◽  
Current Control ◽  
Active Disturbance Rejection Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

In this paper, the speed tracking problem of the interior permanent magnet synchronous motor (IPMSM) of an electric vehicle is studied. A cascade speed control strategy based on active disturbance rejection control (ADRC) and a current control strategy based on improved duty cycle finite control set model predictive control (FCSMPC) are proposed, both of which can reduce torque ripple and current ripple as well as the computational burden. First of all, in the linearization process, some nonlinear terms are added into the control signal for voltage compensation, which can reduce the order of the prediction model. Then, the dq-axis currents are selected by maximum torque per ampere (MTPA). Six virtual vectors are employed to FCSMPC, and a novel way to calculate the duty cycle is adopted. Finally, the simulation results show the validity and superiority of the proposed method.

scholarly journals Cascaded control for balancing an inverted pendulum on a flying quadrotor

Robotica ◽  
2016 ◽  
Vol 35 (6) ◽  
pp. 1263-1279 ◽  
Author(s):  
Chao Zhang ◽  
Huosheng Hu ◽  
Dongbing Gu ◽  
Jing Wang
Keyword(s):  
Trajectory Tracking ◽  
Control Strategy ◽  
Disturbance Rejection ◽  
Inverted Pendulum ◽  
Active Disturbance Rejection Control ◽  
Control Performance ◽  
Linear Quadratic ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Strong Robustness

SUMMARYThis paper is focused on the flying inverted pendulum problem, i.e., how to balance a pendulum on a flying quadrotor. After analyzing the system dynamics, a three loop cascade control strategy is proposed based on active disturbance rejection control (ADRC). Both the pendulum balancing and the trajectory tracking of the flying quadrotor are implemented by using the proposed control strategy. A simulation platform of 3D mechanical systems is deployed to verify the control performance and robustness of the proposed strategy, including a comparison with a Linear Quadratic Controller (LQR). Finally, a real quadrotor is flying with a pendulum to demonstrate the proposed method that can keep the system at equilibrium and show strong robustness against disturbances.

scholarly journals Superheated Steam Temperature Control Based on a Hybrid Active Disturbance Rejection Control

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1757 ◽  
Author(s):  
Gengjin Shi ◽  
Zhenlong Wu ◽  
Jian Guo ◽  
Donghai Li ◽  
Yanjun Ding
Keyword(s):  
Control Strategy ◽  
Disturbance Rejection ◽  
Superheated Steam ◽  
Active Disturbance Rejection Control ◽  
Control Performance ◽  
Steam Temperature ◽  
Loop Control ◽  
Superheated Steam Temperature ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

Superheated steam temperature (SST) is a significant index for a coal-fired power plant. Its control is becoming more and more challenging for the reason that the control requirements are stricter and the load command changes extensively and frequently. To deal with the aforementioned challenges, previously the cascade control strategy was usually applied to the control of SST. However, its structure and tuning procedure are complex. To solve this problem, this paper proposes a single-loop control strategy for SST based on a hybrid active disturbance rejection control (ADRC). The stability and ability to reject the secondary disturbance are analyzed theoretically in order to perfect the theory of the hybrid ADRC. Then a tuning procedure is summarized for the hybrid ADRC by analyzing the influences of all parameters on control performance. Using the proposed tuning method, a simulation is carried out illustrating that the hybrid ADRC is able to improve the dynamic performance of SST with good robustness. Eventually, the hybrid ADRC is applied to the SST system of a power plant simulator. Experimental results indicate that the single-loop control strategy based on the hybrid ADRC has better control performance and simpler structure than cascade control strategies. The successful application of the proposed hybrid ADRC shows its promising prospect of field tests in future power industry with the increasing demand on integrating more renewables into the grid.

scholarly journals Disturbance Rejection Control Method for Isolated Three-Port Converter with Virtual Damping

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3204 ◽  
Author(s):  
Jiang You ◽  
Mengyan Liao ◽  
Hailong Chen ◽  
Negareh Ghasemi ◽  
Mahinda Vilathgamuwa
Keyword(s):  
Power Density ◽  
Control Strategy ◽  
Disturbance Rejection ◽  
Control Method ◽  
Damping Ratio ◽  
Current Control ◽  
Resonant Peak ◽  
Model Parameters ◽  
Control Performance ◽  
Disturbance Rejection Control

The high-power density and capability of three-port converters (TPCs) in generating demanded power synchronously using flexible control strategy make them potential candidates for renewable energy applications to enhance efficiency and power density. The control performance of isolated TPCs can be degraded due to the coupling and interaction of power transmission among different ports, variations of model parameters caused by the changes of the operation point and resonant peak of LC circuit. To address these issues, a linear active disturbance rejection control (LADRC) system is developed in this paper for controlling the utilized TPC. A virtual damping based method is proposed to increase damping ratio of current control subsystem of TPC which is beneficial in further improving dynamic control performance. The simulation and experimental results show that compared to the traditional frequency control strategy, the control performance of isolated TPC can be improved by using the proposed method.

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