On the automatic tuning and adaptation of PID controllers |
| |
Affiliation: | 1. Control Engineering Laboratory, University of Oulu, Box 4300, Oulu FI-90014, Finland;1. Laboratoire des Signaux et Systèmes, CNRS-SUPELEC, Plateau du Moulon, 91192, Gif-sur-Yvette, France;2. Institute of Automation, Hangzhou Dianzi University, Xiasha Higher Education Zone, Hangzhou, 310018, Zhejiang Province, PR China;3. Department of Control Systems and Informatics, ITMO University, Kronverkskiy av. 49, Saint Petersburg, 197101, Russia |
| |
Abstract: | A simple approach to the automatic tuning of PID process controllers is proposed. Like the relay-based autotuner, its objective is to attain a design-point on the Nyquist diagram. By injecting sinewaves and employing a phase/frequency estimator, closed-loop adaptive tuning is possible and there is exact convergence to the design-point without the approximations of describing-function theory. The variant discussed here achieves a required phase margin and imposes a carefully chosen constraint on the controller parameters, leading to consistent behaviour for a wide variety of generic test-cases. A real-life demonstration on a non-linear flow rig is provided. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|