USH703H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manual control apparatus with electable mechanical impedance
Assignee: United States Department of the Air Force
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Filing: 1987-07-30
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Granted: 1989-11-07
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Expires: 2007-07-30
Abstract
Abstract Mechanical impedance determining apparatus for the control stick of an aircraft, an aircraft simulator, or non-aircraft apparatus such as a video game. Impedance determination is accomplished by a feedback path connected from output to input of the control stick with feedback transfer function coefficients determined by operator election in order to achieve positive, negative, or zero mechanical impedance at the control stick. Electrical network and computer realization of the feedback signal transfer function are contemplated using s plane pole descriptions of overall stick and feedback path characterizing transfer functions.
Inventors
- 👤 Daniel W. Repperger
- 👤 Augustus Morris, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:46
CPC Classifications
B; B64; B64C; B64C13/00; B64C13/02; B64C13/04; B64C13/042; B64C13/0421; G; G05; G05G; G05G9/00; G05G9/02; G05G9/04; G05G9/047; G05G2009/04766
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
110 words
Aircraft controlling apparatus comprising the combination of: a manually operable electrical output signal generating aircraft control stick apparatus having a first mathematical transfer function: an electrical signal input to mechanical signal output feedback signal apparatus connected between the electrical signal output of said control stick apparatus and a mechanical input node thereof, the combination of said feedback signal apparatus with said control stick apparatus having a second closed loop transfer function which includes selectable dynamic stability characteristic determining mathematical constant terms therein; means selective of said transfer function dynamic stability determining mathematical constant term values for selecting stability and instability characteristics and characteristics intermediate thereof in said control stick apparatus.
Claim 2
Dependent Claim
110 words
Aircraft controlling apparatus comprising the combination of: a manually operable electrical output signal generating aircraft control stick apparatus having a first mathematical transfer function: an electrical signal input to mechanical signal output feedback signal apparatus connected between the electrical signal output of said control stick apparatus and a mechanical input node thereof, the combination of said feedback signal apparatus with said control stick apparatus having a second closed loop transfer function which includes selectable dynamic stability characteristic determining mathematical constant terms therein; means selective of said transfer function dynamic stability determining mathematical constant term values for selecting stability and instability characteristics and characteristics intermediate thereof in said control stick apparatus.
Claim 3
Dependent Claim
144 words
The aircraft controlling apparatus of claim 1 wherein said first transfer function has the mathematical form of: S.sub.O /S.sub.I =1/(M.sub.s S.sup.2 +B.sub.s S+K), and said second transfer function has the mathematical form of S.sub.O /S.sub.I =1/[(M.sub.s -K.sub.3)S.sup.2 +(B.sub.s -K.sub.2)S+(K.sub.s -K.sub.1)], with the mathematical constant term M s -K 3 measuring physical mass quantity, the mathematical constant term B s -K 2 measuring viscons friction quantity, and the mathematical constant term K s -K 1 , measuring spring constant, and wherein said means selective of dynamic stability determining mathematical constant term values includes mathematical constant values electable between the limits of: K 3 , K 2 , and K 1 being numerically smaller than M s , B s and K s respectively and K 3 , K 2 and K 1 being numerically larger than M s , B s and K s respectively.
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) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |