Bibliographic Details
| Title: |
Design of modified 2-degree-of-freedom proportional–integral–derivative controller for unstable processes |
| Authors: |
Ziwei Li, Zheng Xu, Ridong Zhang, Hongbo Zou, Furong Gao |
| Source: |
Measurement + Control, Vol 53 (2020) |
| Publisher Information: |
SAGE Publishing, 2020. |
| Publication Year: |
2020 |
| Collection: |
LCC:Technology (General) |
| Subject Terms: |
Control engineering systems. Automatic machinery (General), TJ212-225, Technology (General), T1-995 |
| More Details: |
Concerning first-order unstable processes with time delays that are typical in chemical processes, a modified 2-degree-of-freedom proportional–integral–derivative control method is put forward. The system presents a two-loop structure: inner loop and outer loop. The inner loop is in a classical feedback control structure with a proportional controller intended for implementing stable control of the unstable process; the outer loop is in a 2-degree-of-freedom structure with feedforward control of set points, where the system’s tracking response of set points is separated from its disturbance response. To be specific, the system has a feedforward controller that is designed based on the controlled object models and mainly used for regulating the system’s set point tracking characteristics; besides, it has a feedback controller that is designed on the ground of direct synthesis of disturbance suppression characteristics to improve the system’s disturbance rejection. To verify the effectiveness, the system is put into a theoretical analysis and simulated comparison with other methods. Simulation results show that the system has good set point tracking characteristics and disturbance suppression characteristics. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
0020-2940
00202940 |
| Relation: |
https://doaj.org/toc/0020-2940 |
| DOI: |
10.1177/0020294020944954 |
| Access URL: |
https://doaj.org/article/568e7e7477244d329c6dc8499de261db |
| Accession Number: |
edsdoj.568e7e7477244d329c6dc8499de261db |
| Database: |
Directory of Open Access Journals |
