Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1977-02-16
1978-08-08
Zazworsky, John
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307355, 244194, 318564, H03K 1700, G05B 903
Patent
active
041059000
ABSTRACT:
Apparatus for signal selection and signal consolidation of the redundant sensor signals in a triply redundant control system wherein one of the redundant sensors supplies precise information and the remaining two sensors supply less precise information is disclosed. Signal selection is based on the operational state of the three sensors, with the signal provided by the precision sensor being selected whenever the precision sensor is operational. If the precision sensor fails, each channel is supplied with a signal that is a weighted average of the signals supplied by the two less accurate sensors. In some arrangements of the invention whenever the precision sensor has not failed, but supplies a signal that deviates substantially from the signals being supplied by the two less accurate sensors, the signal supplied to each channel of the control system is a weighted average of all three sensor signals. In other arrangements of the invention, a weighted average of the signals supplied by the two less precise sensors is provided whenever the precision sensor fails and whenever the precision sensor has not failed, but supplies a signal that deviates substantially from the signals being supplied by the two less accurate sensors. To prevent abrupt variations in the signal supplied to the control system, the signal supplied by the signal selection apparatus smoothly transists from the signal being supplied at the time a particular failure condition occurs to the signal to be supplied following that failure.
REFERENCES:
patent: 3551776 (1970-12-01), Tawfik et al.
patent: 3663879 (1972-05-01), Salamon et al.
patent: 3813990 (1974-06-01), Coppola et al.
patent: 3881670 (1975-05-01), Doniger
Martin Donald L.
Yanke David B.
The Boeing Company
Zazworsky John
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