Patent US3880352A successfully refreshed from Google Patents.
US3880352A
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Method and device of sampling control
Assignee: Fuji Electric Co Ltd
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Filing: 1974-04-24
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Granted: 1975-04-29
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Expires: 1994-04-24
Abstract
Abstract A method and device for sampling control of a feedback control system wherein the controlled variable can be expressed by a product or a quotient of the manipulated variable and a system disturbance is disclosed. The principle of operation is, in the case where the controlled variable can be expressed as a product, to provide a signal corresponding to a quotient between the actual value of the controlled variable at a certain instant and a desired value, and to multiply said signal by a manipulated variable signal obtained in the previous sampling period, and to send the product signal thus obtained to a controlled system as a new manipulated variable signal in the succeeding sampling period.
Inventors
- 👤 Koichi Ishida
- 👤 Kozo Yoneda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:44
CPC Classifications
G; G05; G05B; G05B21/00; G05B21/02; G05B6/00; G05B6/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
94 words
A sampling control method comprising the steps of providing a signal corresponding to a quotient between the actual value of a controlled variable at a certain instant and a desired value of the controlled variable, multiplying said signal by a manipulated variable signal obtained in the previous sampling period, and sending the product signal thus obtained to a controlled system as a new manipulated variable signal in the succeeding sampling period, whereby the actual value of the controlled variable in the controlled system is automatically equalized to the desired value of the controlled variable.
Claim 2
Dependent Claim
94 words
A sampling control method comprising the steps of providing a signal corresponding to a quotient between the actual value of a controlled variable at a certain instant and a desired value of the controlled variable, multiplying said signal by a manipulated variable signal obtained in the previous sampling period, and sending the product signal thus obtained to a controlled system as a new manipulated variable signal in the succeeding sampling period, whereby the actual value of the controlled variable in the controlled system is automatically equalized to the desired value of the controlled variable.
Claim 3
Dependent Claim
55 words
A sampling control method as recited in claim 1 wherein the actual value of the controlled variable is expressed by the product of the manipulated variable and the system disturbance further comprising the steps of simultaneously sampling and holding the manipulated variable signal and the quotient signal and thereafter sampling and holding the product signal.
Claim 4
Dependent Claim
55 words
A sampling control method as recited in claim 1 wherein the actual value of the controlled variable is expressed by the quotient of the manipulated variable and the system disturbance further comprising the steps of simultaneously sampling and holding the manipulated variable signal and the quotient signal and thereafter sampling and holding tHe product signal.
Claim 5
Dependent Claim
149 words
A sampling control device comprising divider means connected to receive as inputs the actual value signal of the controlled variable and a command signal and for providing a quotient output signal, first sample and hold means connected to said divider means for periodically sample-holding the output of the divider, second sample and hold means for storing the manipulated variable obtained in the preceding sampling period, multipler means connected to said first and second sample and hold means for multiplying the outputs of both of said sample and hold means, third sample and hold means connected to said multiplier means for periodically sample-holding the output of said multiplier means and sending it out to the controlled system as a manipulated variable signal in the new sampling period, and mode control means producing signals for mode-controlling said three sample and hold means at predetermined time intervals corresponding to the sampling period.
Claim 6
Dependent Claim
149 words
A sampling control device comprising divider means connected to receive as inputs the actual value signal of the controlled variable and a command signal and for providing a quotient output signal, first sample and hold means connected to said divider means for periodically sample-holding the output of the divider, second sample and hold means for storing the manipulated variable obtained in the preceding sampling period, multipler means connected to said first and second sample and hold means for multiplying the outputs of both of said sample and hold means, third sample and hold means connected to said multiplier means for periodically sample-holding the output of said multiplier means and sending it out to the controlled system as a manipulated variable signal in the new sampling period, and mode control means producing signals for mode-controlling said three sample and hold means at predetermined time intervals corresponding to the sampling period.
Claim 7
Dependent Claim
61 words
A sampling control device as recited in claim 4 wherein said mode control means controls said first and second sample and hold means to simultaneously sample and hold the outputs of said divider means and said third sample and hold means, respectively, and thereafter controls said third sample and hold means to sample and hold the output of said multiplier means.
Claim 8
Dependent Claim
26 words
A sampling control device as recited in claim 4 wherein said divider means and said multiplier means are an analog divider and an analog multiplier, respectively.
Claim 9
Dependent Claim
23 words
A sampling control device as recited in claim 6 wherein said first, second and third sample and hold means are reset analog integrators.
Claim 10
Dependent Claim
88 words
A sampling control device as recited in claim 7 wherein the controlled system is a digital system further comprising an analog to digital converter connected to the output of said third sample and hold means for converting the analog manipulated variable signal to a digital signal to be supplied to said controlled system, and a digital to analog converter connected to the output of said analog to digital converter for converting said digital signal to an analog signal to be supplied to said second sample and hold means.
References Cited (Backward Citations)
US3456190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |