Control system primarily responsive to signals from digital comp

Details Control system primarily responsive to signals from digital comp Control system primarily responsive to signals from digital comp

1983-05-27

1986-05-20

Smith, Jerry

Boots, shoes, and leggings

364184, 364200, 371 67, 371 68, G05B 1508, G05B 902, G06F 702, H04L 100

Patent

active

045905495

ABSTRACT:
A system controlled by digital computers includes first and second dissimilar digital computers which are distinctly programmed to generate respective nominally identical control signals alternately. The computer alternately generates limiting values for the control signals, each limiting value being generated in a different computer from that in which the control signal was generated. An unacceptable difference between the control signals and their limiting values causes control of the system to be switched to a third computer, which may be an analog computer. The comparisons are also made between the control signals themselves and between the limiting values themselves, and unacceptable differences may cause control to revert to the third computer or alternatively to be transfered to an arrangement generally similar to that set forth above.

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patent: 4504905 (1985-03-01), Burrage
Pinto et al., "Adaptive Synchronization of Processing Clocks", IBM Technical Disclosure Bulletin, vol. 22, No. 5, Oct. 1979.
Swenson, "Alternate Path Control Systems", IBM Technical Disclosure Bulletin, vol. 16, No. 5, Oct. 1973.

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