| Title |
Active Disturbance Rejection Control for Robust Control of Variable Speed Refrigeration System |
| Authors |
Jong Hyeok Ryu ; Seok Kwon Jeong |
| DOI |
https://doi.org/10.6110/KJACR.2025.37.1.1 |
| Keywords |
능동 외란 제거 제어; 확장 상태관측기; 유전 알고리즘; 강인 제어; 가변속 냉동시스템 Active disturbance rejection control; Extended state observer; Genetic algorithm; Robust control; Variable speed refrigeration system |
| Abstract |
This study presents the design of active disturbance rejection control (ADRC) to achieve robust control in the face of disturbances and model uncertainties in a variable speed refrigeration system. The proposed method involves estimating disturbances affecting the system through the design of an extended state observer and careful selection of observer gains. To minimize noise, the estimated disturbances are filtered using a low-pass filter before being integrated into the control input. Importantly, this study employs a genetic algorithm to select the eigenvalues of the system that determine the observer gains. Simulations and experiments conducted using Matlab/Simulink validate the effectiveness of ADRC by confirming the consistency between the results obtained from both approaches. The control performance of the proportional-integral (PI) controller enhanced by ADRC is analyzed in comparison to that of the PI controller alone. Lastly, the robustness of ADRC against model uncertainties is demonstrated through simulations that vary the characteristic parameters associated with model uncertainty and assess the resulting control performance. |