Electricity: motive power systems – Positional servo systems – With protective or reliability increasing features
Patent
1987-06-02
1990-07-03
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
With protective or reliability increasing features
318434, 318471, 361 28, 361 31, H02P 308
Patent
active
049394380
ABSTRACT:
The present invention comprises a relay control circuit that provides highly efficient and reliable control for devices that perform in demanding applications such as space. Multiple levels of redundant function control are provided by redundant actuators that perform mechanical operations. Each actuator is driven by redundant motors for increased reliability. Motor current sensing is provided to determine arrival of the actuator at mechanical stops, which are located at the full deploy position. Limit switches also sense when the actuators are in the full deploy position. In addition, multiple control signal so are required to initiate certain critical operations. Critical operations also are performed redundantly for increased reliability.
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Burtzlaff Richard J.
Tillman Christopher D.
Ip Paul
Orbital Sciences Corporation II
Shoop Jr. William M.
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