Redundant control system for X-wing valve actuators

Details Redundant control system for X-wing valve actuators Redundant control system for X-wing valve actuators

1983-12-27

1986-06-10

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With protective or reliability increasing features

318565, 318632, G05B 903

Patent

active

045945373

ABSTRACT:
The capability of compensating automatically for a failure in an actuator and the associated drive circuit is enhanced by providing a dual channel actuator, each channel having a drive coil and a position sensor tracking the position of the actuator output shaft. A separate circuit is provided for each actuator channel to detect drive loop failures and hydraulic failures. When the drive loop of one channel fails, it is disengaged, and the gain in the remaining drive loop is doubled to maintain authority. In an embodiment, the remaining drive loop cannot disengage when certain criteria, relating to the failure of associated actuators, are met. The invention is particularly useful for aerospace applications.

REFERENCES:
patent: 3408024 (1968-10-01), Iverson
patent: 3422327 (1969-01-01), McBrayer
patent: 4304375 (1981-12-01), Builta

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