Fault-tolerant control system

Electricity: motive power systems – Positional servo systems – With protective or reliability increasing features

Reexamination Certificate

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Details

C318S400040, C318S603000, C318S605000, C318S618000

Reexamination Certificate

active

07960934

ABSTRACT:
A fault-tolerant position feedback filter may be used in an actuation control system to limit the authority of a first position signal, should the first position signal become erroneous, and thereby prevent a postulated runaway condition of an acuator. The filter includes a difference function, a limited integrator, and a summer. The difference function supplies a first position error signal representative of a mathematical difference between a first position signal and a combined position signal. The limited integrator supplies an integrated position error signal that is limited in magnitude to a predetermined limit. The summer supplies the combined position error signal that is representative of a mathematical sum of the integrated position error signal and the second position signal.

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