Method for synchronization of a controller

Details Method for synchronization of a controller Method for synchronization of a controller

2006-04-24

2008-09-09

Barnes-Bullock, Crystal (Department: 2121)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S006130, C714S013000, C714S031000, C714S797000, C700S082000, C701S033000, C701S034000, C702S059000, C318S564000, C326S011000, C326S014000

Reexamination Certificate

active

07424642

ABSTRACT:
A system and method for reintegration of a redundant controller after occurrence of a fault is provided, comprising synchronizing outputs of a primary controller with outputs of secondary controllers. The controller is placed in a different mode of operation in which its output is not used in system control. A meta-controller is activated to drive the primary controller to the same states at which the secondary or redundant controllers operate. A voting mechanism is used to determine a fault in an output to a controlled device. Control of the device using the secondary outputs is effected. The primary controller recalculates the primary output, based upon the primary output; a feedback signal; and, the secondary outputs. Control using the primary output is permitted when the primary output is within an allowable range of the secondary outputs.

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