Patent US3777243A successfully refreshed from Google Patents.
US3777243A
Expired / Lapsed
US
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Positioning control apparatus
Assignee: Toshiba Corp
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Filing: 1972-02-14
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Granted: 1973-12-04
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Expires: 1992-02-14
Abstract
Abstract A positioning control system for positioning a movable member includes a comparator for comparing a controlled variable with a command variable to provide an actuating or error signal. An electric controller provides an electrical manipulated variable signal from the actuating or error signal. A detector will detect when the actuating signal is smaller than a predetermined value to thereby cause the electric controller to change and thereby increase the lag characteristic thereof such that the movable member is quickly and accurately positioned.
Inventors
- 👤 N Taguchi
- 👤 T Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:33
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/21; G05B19/23; G05B19/231; G05B19/232; G05B2219/00; G05B2219/30; G05B2219/41; G05B2219/41309; G05B2219/42; G05B2219/42125
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
97 words
A positioning control system for positioning a movable member comprising: comparator means for comparing a controlled variable with a command variable to produce an actuating signal; an electric controller for developing a manipulated variable in electrical representation from said actuating signal, said electric controller being able to increase a lag characteristic thereof; electro-hydraulic means for driving said movable member in response to said manipulated variable; and detecting means in a forward signal path for detecting when said actuating signal is smaller than a predetermined value to thereby cause said electric controller to increase said lag characteristic thereof.
Claim 2
Dependent Claim
97 words
A positioning control system for positioning a movable member comprising: comparator means for comparing a controlled variable with a command variable to produce an actuating signal; an electric controller for developing a manipulated variable in electrical representation from said actuating signal, said electric controller being able to increase a lag characteristic thereof; electro-hydraulic means for driving said movable member in response to said manipulated variable; and detecting means in a forward signal path for detecting when said actuating signal is smaller than a predetermined value to thereby cause said electric controller to increase said lag characteristic thereof.
Claim 3
Dependent Claim
28 words
A positioning control system according to claim 1, wherein said predetermined value is equal to or larger than a maximum value of any steady-state error which may occur.
Claim 4
Dependent Claim
34 words
A positioning control system according to claim 1, wherein said comparator comprises a reversible counter and a digital-to-analogue cOnverter, and said detecting means detects a digital representation of said actuating signal from said counter.
Claim 5
Dependent Claim
16 words
A positioning control system according to claim 1, wherein said electric controller comprises an operational amplifier.
Claim 6
Dependent Claim
46 words
A positioning control system according to claim 4, wherein said operational amplifier comprises a feedback loop including a resistor and a condenser serially connected thereto, said condenser being arranged such as to be capable of being shunted in response to the operation of said detecting means.
References Cited (Backward Citations)
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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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |