Patent US4189119A successfully refreshed from Google Patents.
US4189119A
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Turbulence compensated throttle control system
Assignee: Boeing Co
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Filing: 1977-11-22
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Granted: 1980-02-19
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Expires: 1997-11-22
Abstract
Abstract A system for processing signals representative of airspeed and inertial longitudinal acceleration in first and second channels, respectively, and providing cancellation of the turbulence-induced components of the respective signals. Shear detection and compensation circuits are provided in the system for reducing speed wandering in moderate and heavy turbulence. A circuit processing the signal ΔV from the shear detector circuit is utilized to provide a gust bias signal input in the system.
Inventors
- 👤 Henri Peter-Contesse
- 👤 Leonard P. Stephan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:07
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/04; G05D1/042; G05D1/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
222 words
In combination in an autothrottle control system for an aircraft; means including a first signal control channel for processing a signal representative of airspeed error and providing an output; means including a second signal control channel for processing a signal representative of inertial longitudinal acceleration and providing an output; means for combining the outputs of said first and second signal control channels to provide a throttle command signal; means for providing a signal representative of airspeed; washout and lag circuit means having an output, said washout and lag circuit means coupled between said second signal control channel and said means for providing a signal representative of airspeed; a signal processing circuit connected in series circuit path between the output of said washout and lag circuit means and said second signal control channel, said signal processing circuit including a limiter circuit (604) and subtraction means (612) for subtracting the limited signal (631) from the input signal upstream from said limiter circuit to provide a remainder signal (636), said signal processing circuit further including a filter circuit (620) for processing said remainder signal and combining circuit means (610) for adding an integrated limited signal (626) and the processed remainder signal (627); and, gust bias signal generating means coupled between said output of said washout and lag circuit means and said first signal control channel.
Claim 2
Dependent Claim
222 words
In combination in an autothrottle control system for an aircraft; means including a first signal control channel for processing a signal representative of airspeed error and providing an output; means including a second signal control channel for processing a signal representative of inertial longitudinal acceleration and providing an output; means for combining the outputs of said first and second signal control channels to provide a throttle command signal; means for providing a signal representative of airspeed; washout and lag circuit means having an output, said washout and lag circuit means coupled between said second signal control channel and said means for providing a signal representative of airspeed; a signal processing circuit connected in series circuit path between the output of said washout and lag circuit means and said second signal control channel, said signal processing circuit including a limiter circuit (604) and subtraction means (612) for subtracting the limited signal (631) from the input signal upstream from said limiter circuit to provide a remainder signal (636), said signal processing circuit further including a filter circuit (620) for processing said remainder signal and combining circuit means (610) for adding an integrated limited signal (626) and the processed remainder signal (627); and, gust bias signal generating means coupled between said output of said washout and lag circuit means and said first signal control channel.
References Cited (Backward Citations)
US3691356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |