US3710223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position control system resolver
Assignee: Boeing North American Inc
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Filing: 1971-08-27
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Granted: 1973-01-09
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Expires: 1991-08-27
Abstract
Abstract A position control system is provided to position a rotatable shaft coupled to a servomotor controlled sequentially by individual ones of a phase ordered group of feedback signals supplied by a resolver also coupled to said shaft. Logic circuitry provides steering signals for sequential gating of said feedback signals at a rate corresponding to the desired angular velocity of the shaft. The invention herein described was made in the course of or under a contract or subcontract thereunder, with the Air Force.
Inventors
- 👤 G Cottrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:13
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/121; G05D3/124
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
193 words
A position control system comprising: a resolver having at least one stator winding and a rotor on which is mounted at least two rotor windings, sAid stator winding adapted to be energized by an alternating potential to induce a voltage in each of said rotor windings to provide an output voltage from each of said rotor windings which output voltages are sinusoidal and are proportional to the sine and cosine, respectively, of the rotor''s angle with respect to the stator; a shaft fixedly mounted to said rotor; means for receiving said output voltages and for producing signals proportional to the positive and negative values of said output voltages; logic means for receiving a position signal corresponding to the desired final position of said rotor shaft and for sequentially gating said positive and negative signals to a logic output with the total number of gated signals being proportional to the difference between the rotor shaft''s actual position and the desired final position; and servo means for receiving the sequentially gated signals at the output of said logic means and for driving said shaft so as to sequentially null each of the received gated signals.
Claim 2
Dependent Claim
193 words
A position control system comprising: a resolver having at least one stator winding and a rotor on which is mounted at least two rotor windings, sAid stator winding adapted to be energized by an alternating potential to induce a voltage in each of said rotor windings to provide an output voltage from each of said rotor windings which output voltages are sinusoidal and are proportional to the sine and cosine, respectively, of the rotor''s angle with respect to the stator; a shaft fixedly mounted to said rotor; means for receiving said output voltages and for producing signals proportional to the positive and negative values of said output voltages; logic means for receiving a position signal corresponding to the desired final position of said rotor shaft and for sequentially gating said positive and negative signals to a logic output with the total number of gated signals being proportional to the difference between the rotor shaft''s actual position and the desired final position; and servo means for receiving the sequentially gated signals at the output of said logic means and for driving said shaft so as to sequentially null each of the received gated signals.
Claim 3
Dependent Claim
34 words
The system according to claim 1 wherein said logic means includes means for producing gating signals at a desired rate for regulating the rate of movement of said member between each adjacent null position.
Claim 4
Dependent Claim
49 words
The invention according to claim 1 wherein each of said rotor windings produce a sinusoidal signal having a series of zero crossover for each cycle of rotation of said rotor shaft to provide a series of corresponding stable angular positions within each cycle of rotation of said rotor shaft.
Claim 5
Dependent Claim
28 words
The system according to claim 3 wherein said logic means sequentially gates individual sinusoidal signals to angularly position the rotor shaft at locations corresponding to the zero crossover.
Claim 6
Dependent Claim
29 words
The system according to claim 4 in which said logic means includes counter circuit means providing forward and reverse operation for producing clockwise and counterclockwise rotation of said shaft.
Claim 7
Dependent Claim
31 words
The system according to claim 4 in which said logic means includes circuit means for providing steering signals at a desired repetition rate for controlling the angular velocity of said shaft.
Claim 8
Dependent Claim
31 words
The system according to claim 4 in which said logic means includes an address register for gating a predetermined number of steering signals for controlling the final position of said shaft.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |