In a typical quadruplex actuator system, how is the failure of an actuator identified?(a) By comparing it with the signal of the three good ones(b) By comparing it with a simulation model(c) Using in-lane fault detection(d) Using reflectometryI got this question in examination.My question is based upon Fly-By-Wire Technology in portion Fly by Wire Flight Control of Avionics

In a typical quadruplex actuator system, how is the failure of an actu

1.	In a typical quadruplex actuator system, how is the failure of an actuator identified?(a) By comparing it with the signal of the three good ones(b) By comparing it with a simulation model(c) Using in-lane fault detection(d) Using reflectometryI got this question in examination.My question is based upon Fly-By-Wire Technology in portion Fly by Wire Flight Control of Avionics
Answer» The CORRECT answer is (a) By comparing it with the signal of the three GOOD ones The EXPLANATION: A typical quadruplex system uses signal processing BASED FDI( Fault Detection and ISOLATION) system. It identifies the failed actuator by comparing its control signal with the other three good ones. A model-based FDI system is generally used in triplex architecture.

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