US3777243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positioning control apparatus
Assignee: Toshiba Corp
•
Filing: 1972-02-14
•
Granted: 1973-12-04
•
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
2026-10-29 01:32
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)
US3283229A
Cited
US3510737A
Cited
US3493826A
Cited
US3555391A
Cited
US3476335A
Cited
US3465276A
Cited
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 |