US3565370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic flight control system
Assignee: Bodenseewerk Geratetechnik GmbH
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Filing: 1968-07-05
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Granted: 1971-02-23
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Expires: 1988-07-05
Abstract
Abstract An aircraft flight control arrangement includes means for actuating a control surface in accordance with a signal representative of the combination of an attitude error signal and a control surface positional signal at relatively low control surface efficiency and with a signal representative of the combination of the attitude error signal and a control surface rate of change signal at relatively high control surface efficiency.
Inventors
- 👤 Waldemar Moller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:02
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/08; G05D1/0808; G05D1/0816
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
155 words
In a flight control arrangement for an aircraft including an aircraft altitude control surface, a drive means coupled to the control surface for varying the position thereof in accordance with an energizing signal applied to said drive means, means for combining input signals and for applying an energizing signal representative of the combination to the drive means, means including a gyroscope adapted for applying an error signal representative of the deviation of the aircraft from an altitude about an axis of the aircraft to said signal combining means, means providing a feedback signal representative of the position of said control surface and a feedback signal representative of a rate of change of position of the surface, the improvement comprising switching means for alternatively applying said positional feedback signal to the signal combining means at relatively low flight speeds and for applying said rate feedback signal to said signal combining means at relatively high flight speeds.
Claim 2
Dependent Claim
155 words
In a flight control arrangement for an aircraft including an aircraft altitude control surface, a drive means coupled to the control surface for varying the position thereof in accordance with an energizing signal applied to said drive means, means for combining input signals and for applying an energizing signal representative of the combination to the drive means, means including a gyroscope adapted for applying an error signal representative of the deviation of the aircraft from an altitude about an axis of the aircraft to said signal combining means, means providing a feedback signal representative of the position of said control surface and a feedback signal representative of a rate of change of position of the surface, the improvement comprising switching means for alternatively applying said positional feedback signal to the signal combining means at relatively low flight speeds and for applying said rate feedback signal to said signal combining means at relatively high flight speeds.
Claim 3
Dependent Claim
64 words
The flight control arrangement of claim 1 wherein the aircraft includes extendable and retractable landing flap control surface and wherein said switching means for alternatively applying said feedback signal to said signal combining means is adapted for alternatively applying said positional feedback signal to said combination means upon extension of the flap and for applying said rate feedback signal upon retraction of said flap.
Claim 4
Dependent Claim
60 words
The flight control arrangement of claim 1 wherein said gyroscope means include means for generating a proportional signal and a rate signal and switching means for coupling said proportional and rate signals of said gyroscope to said signal combining means at relatively slow flight speeds and for decoupling the proportional signal from said combination means at relatively high flight speeds.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |