Applying LESO for Disturbance Rejection of Space Station

2014 ◽  
Vol 721 ◽  
pp. 257-260
Author(s):  
Ping Liu ◽  
Wei Jie Sun
Keyword(s):  
Attitude Control ◽  
Disturbance Rejection ◽  
Space Station ◽  
State Observer ◽  
Extended State Observer ◽  
Disturbance Compensation ◽  
Extended State ◽  
Lqr Controller ◽  
Linear Extended State Observer ◽  
Simulation Results

In this paper, a combing method based on the linear extended state observer (LESO) and the LQR controller is presented. The LESO is applied to estimate the total disturbance of the space station, and an effective disturbance compensation strategy is proposed for the attitude control and moment management. The simulation results illustrate this method is effective

scholarly journals PD-Based Optimal ADRC with Improved Linear Extended State Observer

Entropy ◽  
2021 ◽  
Vol 23 (7) ◽  
pp. 888
Author(s):  
Zhen Zhang ◽  
Jian Cheng ◽  
Yinan Guo
Keyword(s):  
Disturbance Rejection ◽  
Dead Zone ◽  
State Observer ◽  
Extended State Observer ◽  
Control Law ◽  
Extended State ◽  
Pd Control ◽  
Active Disturbance Rejection ◽  
Linear Extended State Observer ◽  
The Dead

Taking dead-zone nonlinearlity and external disturbances into account, an active disturbance rejection optimal controller based on a proportional-derivative (PD) control law is proposed by connecting the proportional-integral-derivative (PID) control, the active disturbance rejection control (ADRC) and particle swarm optimization (PSO), with the purpose of providing an efficient and practical technology, and improving the dynamic and steady-state control performances. Firstly, in order to eliminate the negative effects of the dead-zone, a class of 2-order typical single-input single-out system model is established after compensating the dead-zone. Following that, PD control law is introduced to replace the state error feedback control law in ADRC to simplify the control design. By analyzing the characteristics of the traditional linear extended state observer, an improved linear extended state observer is designed, with the purpose of improving the estimation performance of disturbances. Moreover, employing PSO with a designed objective function to optimize parameters of controller to improve control performance. Finally, ten comparative experiments are carried out to verify the effectiveness and superiority of the proposed controller.

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