Automatic control loop monitoring and diagnostics
US5838561A · kind A · utility
93Cited by
11References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1996 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Sep 23, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2218/12
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of diagnosing a malfunction of a process control system which includes at least one closed loop control loop comprising measuring a histogram of tracking error of the control loop, determining distortion of the tracking error relative to a Gaussian distribution, and indicating a malfunction in the process in the event a deviation from the Gaussian distribution of the tracking error exceeds predetermined limits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.