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How does the digital implementation in the FBW system reduce weight?

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How does the digital implementation in the FBW system reduce weight?

(a) Lightweight materials

(b) Fewer components

(c) System integration

(d) Automated control

The question was asked by my school principal while I was bunking the class.

My enquiry is from Digital Implementation topic in section Fly by Wire Flight Control of Avionics

1 Answer

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Right answer is (c) System integration

For explanation: In a typical Digital FBW system, One computer can control all three axes of control, whereas an analog system requires dedicated hardware for each axis of control. The reduction in hardware weight and volume, due to system integration, is of the order of 5:1 for a system of even modest complexity. The more complex systems could not be implemented economically using analogue technology.

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