Electricity: motive power systems – Positional servo systems – With particular motor control system responsive to the...
Patent
1983-10-27
1985-05-07
Dobeck, B.
Electricity: motive power systems
Positional servo systems
With particular motor control system responsive to the...
318653, 318686, 335220, G05B 1936
Patent
active
045160627
ABSTRACT:
This invention is directed to an actuator which is particularly adapted among many other possible uses, or use in adjusting the configuration of deformable mirrors. The actuator comprises a housing mounted for movement on a fixed base, the housing being fabricated from magnetic material and being configured to have two spaced pole faces of opposite polarity, a housing coil mounted on the housing to form an electro-magnet, apparatus for moving the housing having infinite reflected inertia, a force arm mounted for movement on a fixed base, one portion of the force arm having an output drive pick-off and another portion of the force arm being disposed between the poles faces of the housing, pole pieces mounted on the force arm adjacent the pole faces, respectively, a force arm coil mounted on the force arm to form an electro-magnet, a first permanent magnet mounted on the housing and a second permanent magnet mounted on the force arm which coact to form a magnet coupling between the force arm and the housing, a controller for controlling the apparatus for moving the housing to thereby control the course adjustment output from the force arm and provide low frequency integration of the force arm and for controlling the flow of current to the housing coil and the force arm coil to provide a net force greater than the net force of the two permanent magnets to thereby control the fine adjustment output from the force arm.
REFERENCES:
patent: 3359471 (1967-12-01), Hart et al.
patent: 3936717 (1976-02-01), Hardin
patent: 4123696 (1978-10-01), Olsen
patent: 4200828 (1980-04-01), Ridler et al.
patent: 4274039 (1981-06-01), Glassey et al.
patent: 4310841 (1982-01-01), Olsen
La Fiandra Carlo
Mumola Peter B.
Dobeck B.
Grimes Edwin T.
Masselle F. L.
Murphy Thomas P.
The Perkin-Elmer Corporation
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