US4679136A
Expired / Lapsed
US
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Dynamic error compensating process controller
Assignee: Toshiba Corp
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Filing: 1985-01-10
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Granted: 1987-07-07
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Expires: 2005-01-10
Abstract
Abstract A process control apparatus has a controller for performing a control operation including an integral operation for a set point signal supplied to a process and an output signal from the process and for generating a control signal to the process, and a reference model which has a desired transfer function of a control system and which receives the set point signal. The process control apparatus further has a first subtractor for subtracting the output signal of the reference model from the output signal of the process, an output error compensator for performing a control operation including an integral operation for the output error and for generating a compensation signal in such a manner that the output error becomes zero, and a second subtractor for subtracting the compensation signal from the output control signal of the controller.
Inventors
- 👤 Takashi Shigemasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:05
CPC Classifications
G; G05; G05B; G05B13/00; G05B13/02; G05B13/04; G05B13/042; G05B17/00; G05B17/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
150 words
A process control apparatus comprising: controller means for performing a control operation including an integral operation for a set point signal supplied to a process and an output signal from the process; a reference model having a desired transfer function of a control system including said process and said controller means and receiving the set point signal; first subtracting means for subtracting an output signal of the reference model from the output signal of said process to obtain an output error; output error compensating means for performing control operation including an integral operation for an output error generated from said first subtracting means and for generating a compensation signal such that the output error becomes zero; and second subtracting means for subtracting an output of said output error compensating means from an output of said controller means and for supplying a subtraction result as a control signal to said process.
Claim 2
Dependent Claim
150 words
A process control apparatus comprising: controller means for performing a control operation including an integral operation for a set point signal supplied to a process and an output signal from the process; a reference model having a desired transfer function of a control system including said process and said controller means and receiving the set point signal; first subtracting means for subtracting an output signal of the reference model from the output signal of said process to obtain an output error; output error compensating means for performing control operation including an integral operation for an output error generated from said first subtracting means and for generating a compensation signal such that the output error becomes zero; and second subtracting means for subtracting an output of said output error compensating means from an output of said controller means and for supplying a subtraction result as a control signal to said process.
Claim 3
Dependent Claim
71 words
An apparatus according to claim 1, in which said apparatus further comprises designing means, connected to said controller means, said output error compensating means, and said reference model, for determining parameters of said controller means, said output error compensating means and said reference model in accordance with upper and lower limit values of a dynamic characteristic of the process to be controlled and a response shape coefficient of the control system.
Claim 4
Dependent Claim
61 words
An apparatus according to claim 2, in which said apparatus further comprises on-line identifying means for identifying the dynamic characteristic of the process to be controlled in accordance with said control signal input to said process and said output signal from said process and said designing means determines the parameters in accordance with an identification result of said on-line identifying means.
Claim 5
Dependent Claim
15 words
An apparatus according to claim 1, in which said controller means comprises an I-PD controller.
Claim 6
Dependent Claim
15 words
An apparatus according to claim 1, in which said controller means comprises a PID controller.
Claim 7
Dependent Claim
19 words
An apparatus according to claim 1, in which said output error compensating means comprises a sampled value PID controller.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-06 | 1991-01-05 | 1991-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-06 | 1995-01-05 | 1995-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-06 | 1999-01-05 | 1999-07-07 | $7700.00 | Window Closed / Lapsed |