US3916697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accelerometer tilt error compensator
Assignee: United States Department of the Navy
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Filing: 1974-10-15
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Granted: 1975-11-04
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Expires: 1994-10-15
Abstract
Abstract An accelerometer tilt error system is disclosed as comprising a gyroscope mounted on a vehicle or other platform, a reference signal generator, a multiplier for algebraically multiplying the output signals from said gyroscope and reference generator, and a low pass filter connected to the output of said analog multiplier. An accelerometer is also mounted on said vehicle or other platform, and a summer algebraically adds the output signals from said low pass filter and the aforesaid accelerometer. The output signal from said summer constitutes the tilt error compensated signal of said accelerometer and, thus, any suitable readout, control, or other apparatus may be connected for response thereto.
Inventors
- 👤 Bobby R Ludlum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:03
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
194 words
A tilt error compensation system, comprising in combination: gyroscope means, having a synchro control transmitter, including a rotor winding input and a stator winding output, adapted for being mounted on a predetermined platform for detecting the attitude thereof with respect to a first axis having a predetermined attitude in space and for producing a first signal at the output thereof that has a polarity and amplitude that is proportional to the deviation thereof therefrom; means adapted for being mounted on said predetermined platform for detecting the acceleration thereof along a second axis and for producing a second signal proportional thereto; analog multiplier means having a pair of inputs and an output, with one of the inputs thereof connected to the stator winding output of said gyroscope means; means connected to the rotor winding input of said gyroscope means and the other input of said analog multiplier means for supplying a predetermined reference signal thereto; means connected to the output of said analog multiplier means for filtering the output signal thereform; and means connected to the outputs of said filtering means and the aforesaid platform acceleration detecting means for albebraically summing the output signals therefrom.
Claim 2
Dependent Claim
194 words
A tilt error compensation system, comprising in combination: gyroscope means, having a synchro control transmitter, including a rotor winding input and a stator winding output, adapted for being mounted on a predetermined platform for detecting the attitude thereof with respect to a first axis having a predetermined attitude in space and for producing a first signal at the output thereof that has a polarity and amplitude that is proportional to the deviation thereof therefrom; means adapted for being mounted on said predetermined platform for detecting the acceleration thereof along a second axis and for producing a second signal proportional thereto; analog multiplier means having a pair of inputs and an output, with one of the inputs thereof connected to the stator winding output of said gyroscope means; means connected to the rotor winding input of said gyroscope means and the other input of said analog multiplier means for supplying a predetermined reference signal thereto; means connected to the output of said analog multiplier means for filtering the output signal thereform; and means connected to the outputs of said filtering means and the aforesaid platform acceleration detecting means for albebraically summing the output signals therefrom.
Claim 3
Dependent Claim
14 words
The device of claim 1, wherein said predetermined platform comprises a water surface vehicle.
Claim 4
Dependent Claim
13 words
The device of claim 1, wherein said predetermined platform comprises a submarine vehicle.
Claim 5
Dependent Claim
12 words
The device of claim 1, wherein said predetermined platform comprises an aircraft.
Claim 6
Dependent Claim
13 words
The device of claim 1, wherein said predetermined platform comprises a space craft.
Claim 7
Dependent Claim
13 words
The device of claim 1, wherein said predetermined object comprises a mobile platform.
Claim 8
Dependent Claim
14 words
The device of claim 1, wherein said gyroscope means comprises a vertical sensing gyroscope.
Claim 9
Dependent Claim
36 words
The device of claim 1, wherein said means adapted for being mounted on said predetermined platform for detecting the acceleration thereof along a second axis and for producing a second signal proportional thereto comprises an accelerometer.
Claim 10
Dependent Claim
40 words
The device of claim 1, wherein the means connected to the rotor winding input of said gyroscope means and the other input of said analog multiplier means for supplying a predetermined reference signal thereto comprises a 400 hertz rotodriver generator.
Claim 11
Dependent Claim
28 words
The device of claim 1, wherein said means connected to the output of said analog multiplier means for filtering the output signal therefrom comprises a low pass filter.
Claim 12
Dependent Claim
20 words
The invention of claim 1, further characterized by a utilization apparatus connected to the output of said algebraic summing means.
Claim 13
Dependent Claim
124 words
A tilt error compensation system comprising in combination: a vertical sensing gyroscope, having a synchro control transmitter incorporating a rotor winding and a stator winding, adapted for being mounted on a predetermined platform; an analog multiplier having a pair of inputs and an output, with one of the inputs thereof connected to the stator winding of said vertical sensing gyroscope; a reference signal generator, with the output thereof connected to the other input of said analog multiplier and the rotor of said vertical sensing gyroscope; a low pass filter connected to the output of said analog multiplier; an accelerometer adapted for being connected to the aforesaid predetermined platform; and an algebraic summer connected to the output of said low pass filter and said accelerometer.
Claim 14
Dependent Claim
124 words
A tilt error compensation system comprising in combination: a vertical sensing gyroscope, having a synchro control transmitter incorporating a rotor winding and a stator winding, adapted for being mounted on a predetermined platform; an analog multiplier having a pair of inputs and an output, with one of the inputs thereof connected to the stator winding of said vertical sensing gyroscope; a reference signal generator, with the output thereof connected to the other input of said analog multiplier and the rotor of said vertical sensing gyroscope; a low pass filter connected to the output of said analog multiplier; an accelerometer adapted for being connected to the aforesaid predetermined platform; and an algebraic summer connected to the output of said low pass filter and said accelerometer.
Claim 15
Dependent Claim
14 words
The device of claim 12, wherein said predetermined platform is a towed marine vehicle.
Claim 16
Dependent Claim
19 words
The invention of claim 12, further characterized by a utilization apparatus connected to the output of said algebraic summer.
References Cited (Backward Citations)
US2770452A
Cited
US2942864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |