Aircraft Flight Control System Components Quiz
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Questions and Answers

What is the purpose of the aileron force sensors?

The aileron force sensors provide data to satisfy flight data recording requirements and detect pilot/copilot actions to override the autopilot servos.

How many aileron force sensors are installed on the aircraft?

2

What type of signal do the force sensors receive from the FCCs?

An excitation signal

What is the output of the force sensors to the FCCs?

<p>A voltage signal proportional to the applied force</p> Signup and view all the answers

What component translates the control wheel movement into electrical signals for the FCCs?

<p>The RVDT (Rotary Variable Differential Transformer) sensors</p> Signup and view all the answers

Over what data bus do the FCCs likely communicate the force sensor and RVDT data?

<p>ARINC 429 data bus</p> Signup and view all the answers

What is the purpose of the Rotary Variable Differential Transformers (RVDTs) in the system described?

<p>The RVDTs provide electrical inputs to the flight computers regarding the position of the control wheels.</p> Signup and view all the answers

How many RVDTs are interfaced with each Flight Control Computer (FCC) and the Backup Flight Control Unit (BFCU)?

<p>Each FCC interfaces with one sensor on each wheel, and one sensor provides data to the BFCU.</p> Signup and view all the answers

What is the purpose of the Flight Control Computers (FCCs) and the Backup Flight Control Unit (BFCU) in this system?

<p>The FCCs and BFCU use control laws to determine what action to take based on the commanded position data from the RVDTs.</p> Signup and view all the answers

How do the FCCs and BFCU control the flight control surfaces?

<p>The FCCs send electronic signals to the Remote Electronics Units (REUs) associated with each actuator to move the flight control surfaces to the commanded position.</p> Signup and view all the answers

What is the common attachment point for the position sensors in each wheel assembly?

<p>The position sensors share a common attachment point to the wheel pushrod.</p> Signup and view all the answers

Under what condition will the RVDT cluster return to neutral?

<p>The RVDT cluster returns to neutral only if the RVDT main cluster shaft is sheared off.</p> Signup and view all the answers

What is the purpose of the force sensors on the control wheel?

<p>The force sensors on the control wheel measure the force applied by the pilot and copilot to generate control wheel force data used by the flight control system.</p> Signup and view all the answers

How is the control wheel force data transmitted to the flight control computers?

<p>The control wheel force data is transmitted over the ARINC 429 data bus.</p> Signup and view all the answers

What type of signal is used to power the force sensors?

<p>The force sensors are powered by an excitation voltage signal.</p> Signup and view all the answers

What happens if there is a mismatch between the pilot and copilot control wheel positions?

<p>If there is a mismatch, the 'Roll Control Miscompare' message is displayed in amber color, indicating a potential issue with the roll control.</p> Signup and view all the answers

What is the purpose of the 'Retrim Left Wing Down' and 'Retrim Right Wing Down' messages?

<p>These messages indicate that the aircraft needs to be re-trimmed to maintain level flight due to an issue with the roll control surfaces or aerodynamic imbalance.</p> Signup and view all the answers

What does the 'L-R Aileron Fail' message signify?

<p>The 'L-R Aileron Fail' message indicates that both Remote Electronics Units (REUs) have failed or there is a loss of command to both ailerons, potentially affecting roll control authority.</p> Signup and view all the answers

What is the purpose of the force sensors on the control wheel?

<p>The force sensors on the control wheel measure the force applied by the pilots and provide this data to the Flight Control Computers (FCCs).</p> Signup and view all the answers

What type of signal do the FCCs provide to the force sensors?

<p>The FCCs provide an excitation signal to the force sensors.</p> Signup and view all the answers

What is the output of the force sensors to the FCCs?

<p>The force sensors output a voltage signal proportional to the applied force.</p> Signup and view all the answers

How is the control wheel force data transmitted from the FCCs to other systems?

<p>The FCCs provide the force data on an ARINC 429 data bus to the Modular Avionics Units (MAUs).</p> Signup and view all the answers

What is the purpose of the excitation signal provided by the FCCs to the force sensors?

<p>The excitation signal allows the force sensors to generate a voltage output proportional to the applied force.</p> Signup and view all the answers

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