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Old 1st Oct 2011, 15:04
  #1036 (permalink)  
RR_NDB
 
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Combinational logic x Sequential logic

In Combinational logic " the output is a pure function of the present input only". E.g. the (interlock) micro switch on the door of a Cessna prevents flaps activation.

In Sequential logic the "output depends not only on the present input but also on the history of the input". F-GZCP System "memorized" PF initial NU, maintaining THS at 13deg til the end of the flight.

In TAM 3054 case both pilots didn't understand timely the system output (combinational logic).

Combinational and Sequential logic can help decisively but unfortunately may generate "difficulty to understand" in certain situations specially if you add human factors to the issue.

Not present among us, you know. Most here are open minded professionals always trying to do the best. Using technology and ALWAYS checking it for a "quality control", in a constant "questioning". Something VERY USEFUL for any Project as an important and necessary feedback.
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