Aircraft Flight Control Systems Quiz

Force sensors (strain gauges)

The REU commands the electro-hydraulic servo valve proportional to the ram error until the control error is reduced to zero.

LVDTs provide surface position data to the associated REU.

<p>The FCCs receive the detected force changes at the pilot/copilot stations through one sensor on each column.</p> Signup and view all the answers

<p>Hydraulic Electric</p> Signup and view all the answers

<p>The stick shaker motors shake the control column during an approaching stall before the maximum Angle of Attack (AOA) is exceeded, to provide the pilots with tactile feedback of the approaching stall condition.</p> Signup and view all the answers

<p>The FCC controls the activation of the stick shakers by internally switching the 28 Vdc power to the stick shaker motors. The power for the motors is routed through the FCC and passes through internal switches controlled by the FCC software.</p> Signup and view all the answers

<p>The AOA limiting function allows the pilots to command pitch inputs, but limits the aircraft's Angle of Attack (AOA) to the maximum allowed AOA. This prevents the aircraft from exceeding the stall AOA limit.</p> Signup and view all the answers

<p>The elevators move in unison with each other to control the aircraft's pitch around the lateral axis. The elevators are hinged to the left and right horizontal stabilizer rear beams at various stations along the span of the stabilizers.</p> Signup and view all the answers

<p>The LVDT (Linear Variable Differential Transformer) sensors on each elevator control surface are used to detect the position of the elevator, providing feedback to the flight control computers on the actual position of the control surface.</p> Signup and view all the answers

<p>The FCCs receive information about pilot/copilot control inputs through force sensors installed on the control columns. These sensors detect changes in the force applied by the pilots, and transmit this data to the FCCs.</p> Signup and view all the answers

<p>The EBHA is responsible for physically moving the elevator control surfaces in response to commands from the flight control computers. The EBHA converts the electrical signals from the FCCs into the hydraulic power required to position the elevators.</p> Signup and view all the answers

<p>When the REU detects a difference between the demanded elevator position and the actual position, it will adjust the EBHA actuator to move the elevator and eliminate the discrepancy. The REU continuously monitors the elevator position and makes corrections as needed to maintain the commanded control surface position.</p> Signup and view all the answers

<p>The EBHA actuator is powered by the aircraft's hydraulic system, which provides the necessary hydraulic pressure and flow to position the elevator control surfaces.</p> Signup and view all the answers

<p>Force sensors are installed on each pilot and copilot control column to detect the changes in force applied by the pilots. These sensors transmit the force data to the flight control computers, which then use this information to determine the pilots' control inputs.</p> Signup and view all the answers