Flight Control Systems

Description: This quiz covers various aspects of Flight Control Systems, including stability, control, and guidance of aircraft.
Number of Questions: 14
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Tags: flight control systems stability control guidance
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What is the primary function of a flight control system?

  1. To maintain stability and control of an aircraft

  2. To provide guidance to the aircraft

  3. To generate thrust for the aircraft

  4. To control the aircraft's attitude


Correct Option: A
Explanation:

The primary function of a flight control system is to maintain stability and control of an aircraft by adjusting its control surfaces to counteract disturbances and maintain the desired flight path.

Which of the following is NOT a type of flight control surface?

  1. Ailerons

  2. Elevators

  3. Rudder

  4. Flaps


Correct Option: D
Explanation:

Flaps are used to increase lift and drag during takeoff and landing, but they are not considered flight control surfaces in the same way as ailerons, elevators, and rudders, which are used to control the aircraft's attitude and direction.

What is the purpose of ailerons?

  1. To control the aircraft's roll

  2. To control the aircraft's pitch

  3. To control the aircraft's yaw

  4. To control the aircraft's altitude


Correct Option: A
Explanation:

Ailerons are flight control surfaces located on the trailing edge of the wings that are used to control the aircraft's roll, or rotation around its longitudinal axis.

What is the purpose of elevators?

  1. To control the aircraft's roll

  2. To control the aircraft's pitch

  3. To control the aircraft's yaw

  4. To control the aircraft's altitude


Correct Option: B
Explanation:

Elevators are flight control surfaces located on the trailing edge of the horizontal stabilizer that are used to control the aircraft's pitch, or rotation around its lateral axis.

What is the purpose of the rudder?

  1. To control the aircraft's roll

  2. To control the aircraft's pitch

  3. To control the aircraft's yaw

  4. To control the aircraft's altitude


Correct Option: C
Explanation:

The rudder is a flight control surface located on the trailing edge of the vertical stabilizer that is used to control the aircraft's yaw, or rotation around its vertical axis.

What is the difference between stability and control in flight control systems?

  1. Stability refers to the aircraft's ability to return to its equilibrium state after a disturbance, while control refers to the ability to maneuver the aircraft as desired.

  2. Stability refers to the aircraft's ability to maintain its attitude, while control refers to the ability to change its attitude.

  3. Stability refers to the aircraft's ability to resist disturbances, while control refers to the ability to generate disturbances.

  4. Stability refers to the aircraft's ability to fly in a straight line, while control refers to the ability to turn.


Correct Option: A
Explanation:

Stability refers to the aircraft's ability to return to its equilibrium state after a disturbance, such as a gust of wind or a change in control input, while control refers to the ability to maneuver the aircraft as desired, such as changing its direction or altitude.

What is the role of feedback in flight control systems?

  1. To provide information about the aircraft's state to the control system

  2. To generate control inputs based on the desired aircraft state

  3. To compare the actual aircraft state with the desired state and generate corrective control inputs

  4. To stabilize the aircraft's attitude


Correct Option: C
Explanation:

Feedback in flight control systems involves comparing the actual aircraft state with the desired state and generating corrective control inputs to minimize the difference between the two.

What is the purpose of a flight control computer?

  1. To receive sensor data and generate control inputs

  2. To store flight control laws and algorithms

  3. To communicate with other aircraft systems

  4. To monitor the health of the flight control system


Correct Option: A
Explanation:

The flight control computer receives sensor data from various sources, such as accelerometers, gyroscopes, and airspeed sensors, and uses this data to generate control inputs that are sent to the aircraft's control surfaces.

What is the role of sensors in flight control systems?

  1. To provide information about the aircraft's state to the control system

  2. To generate control inputs based on the desired aircraft state

  3. To compare the actual aircraft state with the desired state and generate corrective control inputs

  4. To stabilize the aircraft's attitude


Correct Option: A
Explanation:

Sensors in flight control systems provide information about the aircraft's state, such as its attitude, velocity, and acceleration, to the control system, which uses this information to generate appropriate control inputs.

What is the purpose of actuators in flight control systems?

  1. To receive control inputs from the flight control computer

  2. To generate control forces and moments

  3. To move the aircraft's control surfaces

  4. To stabilize the aircraft's attitude


Correct Option: C
Explanation:

Actuators in flight control systems receive control inputs from the flight control computer and use these inputs to move the aircraft's control surfaces, such as ailerons, elevators, and rudders.

What is the role of aerodynamic forces in flight control?

  1. To generate lift and drag

  2. To provide stability and control

  3. To generate thrust

  4. To control the aircraft's attitude


Correct Option: B
Explanation:

Aerodynamic forces, such as lift and drag, play a crucial role in providing stability and control to an aircraft. These forces are generated by the interaction between the aircraft's surfaces and the surrounding air.

What is the difference between open-loop and closed-loop flight control systems?

  1. In an open-loop system, the control inputs are generated without feedback from the aircraft's state, while in a closed-loop system, feedback is used to adjust the control inputs.

  2. In an open-loop system, the control inputs are generated based on a predetermined set of rules, while in a closed-loop system, the control inputs are generated based on real-time sensor data.

  3. In an open-loop system, the control inputs are generated by a human pilot, while in a closed-loop system, the control inputs are generated by an autopilot.

  4. In an open-loop system, the control inputs are generated by a computer, while in a closed-loop system, the control inputs are generated by a human pilot.


Correct Option: A
Explanation:

In an open-loop flight control system, the control inputs are generated without feedback from the aircraft's state, while in a closed-loop system, feedback is used to adjust the control inputs based on the aircraft's actual state.

What is the purpose of a trim system in flight control?

  1. To adjust the aircraft's control surfaces to maintain a desired attitude without continuous pilot input

  2. To generate control inputs to counteract disturbances

  3. To provide stability and control to the aircraft

  4. To move the aircraft's control surfaces


Correct Option: A
Explanation:

The purpose of a trim system in flight control is to adjust the aircraft's control surfaces to maintain a desired attitude without continuous pilot input, reducing the pilot's workload and improving aircraft stability.

What is the role of the pilot in flight control?

  1. To provide inputs to the flight control system

  2. To monitor the aircraft's state and make adjustments as needed

  3. To communicate with air traffic control

  4. To navigate the aircraft


Correct Option:
Explanation:

The pilot plays a crucial role in flight control by providing inputs to the flight control system, monitoring the aircraft's state and making adjustments as needed, communicating with air traffic control, and navigating the aircraft.

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