US4523282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiskid control circuit
Assignee: Lockheed Martin Tactical Systems Inc
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Filing: 1982-03-08
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Granted: 1985-06-11
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Expires: 2002-03-08
Abstract
Abstract An antiskid control circuit for aircraft or other braked vehicles in which a deceleration detector determines the instantaneous rate of deceleration of the vehicle, and provides a deceleration signal to an integrator and lead network, in parallel interconnection. The outputs of the lead network and modulator are applied to an antiskid valve through a summing circuit. The deceleration detector is provided with a selectable gain, such that the gain is greater when the wheel is decelerating than when it is accelerating, allowing the integrator to obtain an average charge as a function of deceleration.
Inventors
- 👤 Arnold A. Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:58
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/1701; B60T8/1703
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
An antiskid control circuit, comprising: a deceleration detector, receiving an input signal corresponding to the instantaneous speed of a wheel and generating therefrom a deceleration signal; modulation means connected to and receiving said deceleration signal from said deceleration detector for generating a brake control signal therefrom dependent upon rotational activity of the wheel; and said deceleration detector including gain selection means for changing the output gain of said deceleration detector as a function of said rotational activity of the wheel, said gain selection means providing a first gain to said deceleration detector during periods in which the wheel accelerates and a second gain during periods in which the wheel decelerates, said first gain being lower than said second gain.
Claim 2
Dependent Claim
119 words
An antiskid control circuit, comprising: a deceleration detector, receiving an input signal corresponding to the instantaneous speed of a wheel and generating therefrom a deceleration signal; modulation means connected to and receiving said deceleration signal from said deceleration detector for generating a brake control signal therefrom dependent upon rotational activity of the wheel; and said deceleration detector including gain selection means for changing the output gain of said deceleration detector as a function of said rotational activity of the wheel, said gain selection means providing a first gain to said deceleration detector during periods in which the wheel accelerates and a second gain during periods in which the wheel decelerates, said first gain being lower than said second gain.
Claim 3
Dependent Claim
44 words
The antiskid control circuit as recited in claim 1 wherein said deceleration detector comprises a differentiating amplifier and said gain selection means comprises a pair of resistors in parallel feedback interconnection across said amplifier, one said resistor being in series interconnection with a diode.
Claim 4
Dependent Claim
28 words
The antiskid control circuit as recited in claim 1 wherein said modulation means comprises an integrator, integrating said deceleration signal as to both periods of acceleration and deceleration.
Claim 5
Dependent Claim
27 words
The antiskid control circuit as recited in claim 3 which further includes a lead network in parallel interconnection with said integrator, receiving and differentiating said deceleration signal.
Claim 6
Dependent Claim
35 words
The antiskid control circuit as recited in claim 4 which further includes a summing circuit receiving and summing outputs from said integrator and lead network and applying said summed output signals to a brake valve.
Claim 7
Dependent Claim
69 words
An antiskid control circuit for regulating the brake pressure to the wheel of a braked vehicle, comprising: a deceleration detector receiving a signal corresponding to instantaneous wheel speed and generating a deceleration signal therefrom: a gain selection circuit interconnected with said deceleration detector, selectively changing the gain of said deceleration detector; and an integrator receiving and integrating said deceleration signal and providing said integrated signal to a brake valve.
Claim 8
Dependent Claim
69 words
An antiskid control circuit for regulating the brake pressure to the wheel of a braked vehicle, comprising: a deceleration detector receiving a signal corresponding to instantaneous wheel speed and generating a deceleration signal therefrom: a gain selection circuit interconnected with said deceleration detector, selectively changing the gain of said deceleration detector; and an integrator receiving and integrating said deceleration signal and providing said integrated signal to a brake valve.
Claim 9
Dependent Claim
35 words
The antiskid control circuit according to claim 6 wherein said gain selection circuit sets a first gain for said deceleration detector when wheel speed is accelerating, and a second when said wheel speed is decelerating.
Claim 10
Dependent Claim
26 words
The antiskid control circuit according to claim 7 which further includes a lead network in shunt with said integrator, said lead network receiving said deceleration signal.
Claim 11
Dependent Claim
23 words
The antiskid control circuit according to claim 8 which further includes a summing circuit interposed between said brake valve, lead network, and integrator.
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) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |