Patent US6493596B1 successfully refreshed from Google Patents.
US6493596B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling a non-linear mill
Assignee: Rockwell Automation Technologies Inc
•
Filing: 2000-02-28
•
Granted: 2002-12-10
•
Expires: 2020-02-28
Abstract
Abstract A method and apparatus for controlling a non-linear mill. A linear controller is provided having a linear gain k that is operable to receive inputs representing measured variables of the plant and predict on an output of the linear controller predicted control values for manipulatible variables that control the plant. A non-linear model of the plant is provided for storing a representation of the plant over a trained region of the operating input space and having a steady-state gain K associated therewith. The gain k of the linear model is adjusted with the gain K of the non-linear model in accordance with a predetermined relationship as the measured variables change the operating region of the input space at which the linear controller is predicting the values for the manipulatible variables. The predicted manipulatible variables are then output after the step of adjusting the gain k.
Inventors
- 👤 Gregory D. Martin
- 👤 Eugene Boe
- 👤 Stephen Piche
- 👤 James David Keller
- 👤 Douglas Timmer
- 👤 Mark Gerules
- 👤 John P. Havener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:05
CPC Classifications
G; G05; G05B; G05B13/00; G05B13/02; G05B13/04; G05B13/048; G05B13/042; G05B17/00; G05B17/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
A method for controlling a non-linear plant, comprising the steps of: providing a linear controller having a linear gain k that is operable to receive inputs representing measured variables of the plant and predicting on an output of the linear controller predicted control values for manipulatible variables that control the plant; providing a non-linear model of the plant for storing a representation of the plant over a trained region of the operating input space and having a steady-state gain K associated therewith; adjusting the gain k of the linear controller with the gain K of the non-linear model in accordance with a predetermined relationship as the measured variables change the operating region of the input space at which the linear controller is predicting the values for the manipulatible variables; and outputting the predictive manipulatible variables after the step of adjusting the gain k.
Claim 2
Independent Claim
143 words
A method for controlling a non-linear plant, comprising the steps of: providing a linear controller having a linear gain k that is operable to receive inputs representing measured variables of the plant and predicting on an output of the linear controller predicted control values for manipulatible variables that control the plant; providing a non-linear model of the plant for storing a representation of the plant over a trained region of the operating input space and having a steady-state gain K associated therewith; adjusting the gain k of the linear controller with the gain K of the non-linear model in accordance with a predetermined relationship as the measured variables change the operating region of the input space at which the linear controller is predicting the values for the manipulatible variables; and outputting the predictive manipulatible variables after the step of adjusting the gain k.
Claim 3
Dependent Claim
19 words
The method of claim 1 , wherein the linear controller is operable to model the dynamics of the plant.
Claim 4
Dependent Claim
22 words
The method of claim 1 , wherein the dynamics of the plant are modeled over a defined region of the input space.
Claim 5
Dependent Claim
41 words
The method of claim 1 , wherein the training region of the operating input space over which the non-linear model is representative of the operation of the plant represents a space greater than that over which the linear controller is valid.
Claim 6
Dependent Claim
28 words
The method of claim 1 , and further comprising the step of controlling the operation of the plant with the predicted control variables after the step of adjusting.
References Cited (Backward Citations)
US4358822A
Cited
US4228509A
Cited
US4230534A
Cited
US4368509A
Cited
US4349869A
Cited
US4466054A
Cited
US4549123A
Cited
US4639853A
Cited
US4628462A
Cited
US4674029A
Cited
US4754391A
Cited
US4663703A
Cited
US4868754A
Cited
US4736316A
Cited
US4769766A
Cited
EP0280948A1
Cited
US4858147A
Cited
US5251285A
Cited
US4965713A
Cited
US5091843A
Cited
US4953886A
Cited
US5305230A
Cited
US5311421A
Cited
US5111531A
Cited
US5282261A
Cited
US5285377A
Cited
US5268834A
Cited
US5283729A
Cited
US5467291A
Cited
WO1993015448A1
Cited
US5396415A
Cited
US5369345A
Cited
US5282130A
Cited
US5477444A
Cited
US5486996A
Cited
WO1996012990A1
Cited
US5933345A
Cited
US6278899B1
Cited
US6381504B1
Cited
US6047221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-12-09 | 2006-06-10 | 2006-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-12-09 | 2010-06-10 | 2010-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-12-09 | 2014-06-10 | 2014-12-10 | $7700.00 | Window Closed / Lapsed |