Electrical generator or motor structure – Dynamoelectric – Oscillating
Patent
1996-10-03
1998-05-12
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Oscillating
310 37, 310 80, 244165, 74 534, 74 547, H02K 3300, H02K 3500
Patent
active
057510784
ABSTRACT:
A reactionless momentum compensated payload positioner adapted to be mounted on a supporting body for providing momentum compensation of an oscillatory and scanning payload and for suppressing reactions in the supporting body to the torques that occur as an aiming angle of the payload is changed. The payload positioner includes a gimbal assembly having at least two axis of rotation including an elevation axis and an azimuth axis. A pair of reactionless drive module are provided for rotating the payload about both axes. Each reactionless drive module includes a housing, a main drive shaft connected to the payload, a DC electric motor for rotating the drive shaft, and a flywheel. The main drive shaft is freely rotatably suspended within the housing by main bearings and the flywheel is freely rotatably mounted to the main drive respect to the main drive shaft.! The speed of the flywheel is effective to substantially eliminate reaction torques in the supporting body as the aiming angle of the payload is changed. The flywheel is also effective to provide momentum compensation to the payload and thereby substantially eliminate gyroscopic effects that occur due to rotational movement about either one of the two axis of the gimbal assembly. The invention further includes a first position transducer for determining and controlling payload pointing position and speed and a second position transducer for determining and controlling speed of said flywheel. A trim motor is provided for eliminating parasitic drag and for keeping the flywheel in registration with the payload and the payload in registration with the build up of the flywheel due to bias speed errors.!
REFERENCES:
patent: 3252023 (1966-05-01), Schmidt
patent: 3514778 (1970-05-01), Titus
patent: 3952217 (1976-04-01), Rawlings
patent: 4021716 (1977-05-01), Rue
patent: 4285248 (1981-08-01), Noar et al.
patent: 4587860 (1986-05-01), Audren
patent: 4608874 (1986-09-01), Audren
patent: 4723735 (1988-02-01), Eisenhaure et al.
patent: 4976163 (1990-12-01), Schumacher
patent: 4997414 (1991-03-01), Camara et al.
patent: 5012170 (1991-04-01), Atlas
patent: 5013986 (1991-05-01), Gauggel
patent: 5042753 (1991-08-01), Atlas
patent: 5063336 (1991-11-01), Atlas
patent: 5210636 (1993-05-01), Baer
patent: 5214749 (1993-05-01), Brown
patent: 5238461 (1993-08-01), Gotman
patent: 5270594 (1993-12-01), Hulsing, II
patent: 5277076 (1994-01-01), Ostaszewski
patent: 5283682 (1994-02-01), Ostaszewski
patent: 5396815 (1995-03-01), Polites et al.
"Angular-Momemtum-Compensating Actuator", NASA Technical Support Package, Oct. 1988, vol. 12, No. 9, Item #43, pp. i-26a.
Enad Elvin G.
Lockheed Martin Corp. Missiles & Space
Stephan Steven L.
LandOfFree
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