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Integrated and Modular Systems for Commercial ... - Nonstop Systems

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15<br />

System Complexity <strong>and</strong> Size<br />

Typical large jetliner:<br />

� ≈ 8,000 inputs & outputs<br />

� these I/Os interface to ≈ 700 peripheral units<br />

at various parts of the aircraft<br />

� ≈ 90 different avionics units<br />

� ≈ 160 microprocessors (≈ 8 types)<br />

� adding/changing of avionics is complicated &<br />

expensive<br />

� many flight-deck switches & controls<br />

(e.g., 250 on 747-400, down from 900 on 747-200)<br />

source: Airbus Industries<br />

©1997 F.M.G. Dörenberg

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