System and method for automatically tuning a process controller
US5453925A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1993 |
| Grant date | Sep 26, 1995 |
| Priority date | — |
| Expiry date | May 28, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B13/025
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system and method for automatically tuning a process controller used to control an industrial process, or the like. The controller is removed from closed-loop control of a process under control, and a signal is applied to the process under control to cause the process to undergo controlled self-oscillation. A first portion of the self-oscillation procedure is used to determine a Time Delay characteristic of the process under control, and a subsequent portion of the self-oscillation procedure as used to calculate an Ultimate Gain characteristic and an Ultimate Period characteristic of the process under control. These three characteristics are then used to calculate control parameters which are used to tune the controller. After tuning, the controller is placed back into a closed-loop with the process under control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.