Self-learning memory unit for process controller and self-updating function generator
US5126933A · kind A · utility
Inventor
Key dates
| Filing date | Feb 7, 1990 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Feb 7, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B13/0265
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A device and method are described with which a function generator output can be automatically obtained based on a meaningful reference input signal and updated as required in conjunction with a controller which regulates a process such as a variable element or a variable setpoint or the like. The device samples the controller setpoint, output and the input index. A memory section is used to store output values that were last found correct for the input index and are retrieved whenever said index value is encountered. The retrieved last-correct value for a particular input index is corrected with a modifier that is derived from a representative controller setpoint and controller output to produce a currently-correct output for regulation of the process. The last correct value for any one particular input index value is only updated after the latter index has changed so as to avoid interference with the normal operation of the controller. Several embodiments are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.