Digital control system including means for maintaining signals s

Details Digital control system including means for maintaining signals s Digital control system including means for maintaining signals s

1982-08-27

1985-03-12

Thomas, James D.

Boots, shoes, and leggings

364131, 364551, 371 9, G06F 1120, G06F 1516

Patent

active

045049050

ABSTRACT:
An apparatus, for example a gas turbine engine is normally controlled by a digital first computer which is responsive to engine operating conditions. A second computer is responsive to selected ones of said conditions. Control signals from the digital computer are monitored by a circuit which generates analog signals which lie within acceptable ranges and which correspond to the values generated by the digital computer. The monitor circuit supplies the engine with signals selected from whichever of the analog value and corresponding digital value lies farthest from a predetermined limit. Predetermined levels of discrepancy between any of the analog values and its corresponding digital value cause control of the engine to be transferred to the second computer, which may also be a digital computer.

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"Electronic Analog and Hybrid Computers", by Korn and Korn, McGraw-Hill, 1964, pp. 243-352, et seq. and FIG. 9-8.

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