| Title |
Robust Hybrid Model Reference Adaptive Control for a Variable Speed Refrigeration System |
| Authors |
Hyun Seo Nam ; Seok Kwon Jeong |
| DOI |
https://doi.org/10.6110/KJACR.2025.37.5.245 |
| Keywords |
하이브리드 모델 참조 적응제어기; 개선된 MIT 규칙; 강인제어; 가변속 냉동시스템 Hybrid model reference adaptive controller; Modified MIT rule; Robust control; Variable speed refrigeration system |
| Abstract |
This paper aimed to design a hybrid model reference adaptive controller (H-MRAC) that would be robust to model parameter uncertainty and disturbances to achieve high precision control of variable speed refrigeration system (VSRS). The designed H-MRAC was based on the modified MIT rule with control performance that strictly followed command values by a parameter that could minimize specific error functions. The designed H-MRAC was found to have robust control performance based on simulation and experiments of disturbance application and model parameter fluctuations for VSRS. When control performance of the designed H-MRAC was compared with that of an existing PI-only controller, it was confirmed that the designed H-MRAC had a faster settling time, fewer undershoots, and fewer steady-state errors for more precise and robust control. This is due to the advantage that the parameter used in the control of H-MRAC is automatically updated without relying on characteristic parameters of the model. |