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Patent US4410952A successfully refreshed from Google Patents.
US4410952A
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Method and apparatus for generating nose wheel speed signals
Assignee: Boeing Co
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Filing: 1981-08-05
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Granted: 1983-10-18
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Expires: 2001-08-05
Abstract
Abstract Left and right main gear wheel speed signals are processed by a circuit which is a model of aircraft rigid body motion to provide a synthesized nose wheel velocity representative signal.
Inventors
- 👤 Garrett H. DeVlieg
- 👤 Andrew M. Valaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:09
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/56
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
183 words
Method of indicating the nose wheel velocity of an aircraft to a pilot of the aircraft for controlling lateral acceleration limits of the aircraft including the steps of: providing a signal representative of left main gear wheel velocity; providing a signal representative of right main gear wheel velocity; computing a value representative of nose wheel velocity utilizing an equation derived from rigid body motion of said aircraft, wherein said equation is: ##EQU2## where V N is the synthesized nose wheel velocity, L is the length of the body between nose gear and main gear, V L is the velocity of said left main gear wheel, V R is the velocity of said right main gear wheel, said right main gear wheel symmetrically opposed to said left main gear wheel, and T is the track width between left and right main gear wheels; providing a signal proportional to the computed value representative of nose wheel velocity; utilizing such signal to drive a display indicating nose wheel velocity; and then, utilizing said computed nose wheel velocity for controlling the lateral acceleration limits of the aircraft.
Claim 2
Dependent Claim
183 words
Method of indicating the nose wheel velocity of an aircraft to a pilot of the aircraft for controlling lateral acceleration limits of the aircraft including the steps of: providing a signal representative of left main gear wheel velocity; providing a signal representative of right main gear wheel velocity; computing a value representative of nose wheel velocity utilizing an equation derived from rigid body motion of said aircraft, wherein said equation is: ##EQU2## where V N is the synthesized nose wheel velocity, L is the length of the body between nose gear and main gear, V L is the velocity of said left main gear wheel, V R is the velocity of said right main gear wheel, said right main gear wheel symmetrically opposed to said left main gear wheel, and T is the track width between left and right main gear wheels; providing a signal proportional to the computed value representative of nose wheel velocity; utilizing such signal to drive a display indicating nose wheel velocity; and then, utilizing said computed nose wheel velocity for controlling the lateral acceleration limits of the aircraft.
Claim 3
Dependent Claim
167 words
A converter circuit for generating nose wheel speed signals from main landing wheel speed signals, said converter having: a first converter input terminal; a second converter input terminal; a converter output terminal; said first converter input terminal responsive to a signal V L representative of left main gear wheel velocity; said second converter input terminal responsive to a signal V R representative of right main gear wheel velocity; first means for providing a signal representative of K 1 V L -K 2 V R ; and, second means for providing a signal representative of K 1 V R -K 2 V L where K 1 and K 2 are fixed constants; a select largest circuit having an output terminal coupled to said converter output terminal, said select largest circuit selecting the largest of said signals representative of V L , V R , K 1 V L -K 2 V R , and K 1 V R -K 2 V L to provide said nose wheel signals.
Claim 4
Dependent Claim
167 words
A converter circuit for generating nose wheel speed signals from main landing wheel speed signals, said converter having: a first converter input terminal; a second converter input terminal; a converter output terminal; said first converter input terminal responsive to a signal V L representative of left main gear wheel velocity; said second converter input terminal responsive to a signal V R representative of right main gear wheel velocity; first means for providing a signal representative of K 1 V L -K 2 V R ; and, second means for providing a signal representative of K 1 V R -K 2 V L where K 1 and K 2 are fixed constants; a select largest circuit having an output terminal coupled to said converter output terminal, said select largest circuit selecting the largest of said signals representative of V L , V R , K 1 V L -K 2 V R , and K 1 V R -K 2 V L to provide said nose wheel signals.
Claim 5
Dependent Claim
21 words
The invention according to claim 2 wherein said fixed constants K 1 and K 2 equal about 1.8 and 1.1 respectively.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-17 | 1987-04-18 | 1987-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-17 | 1991-04-18 | 1991-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-17 | 1995-04-18 | 1995-10-18 | $7700.00 | Window Closed / Lapsed |