Question

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 reflectometry

I got this question in examination.

My question is based upon Fly-By-Wire Technology in portion Fly by Wire Flight Control of Avionics

Answer 1

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.