In autopilot operation, which signal can nullify the input to the ailerons?

In autopilot operation, which signal can nullify the input to the ailerons?

• A. Attitude command
• B. Follow up
• C. Roll rate
• D. Altitude hold

Answer: (B)

In autopilot control, the signal that can effectively cancel or neutralize the aileron command is the follow-up signal. This feedback signal works to counteract the current aileron demand, bringing the net command toward zero when no rolling input is required. In practical terms, it acts as a stabilizing brake on the roll channel so the wings stay level unless a roll command is actively needed. Attitude command would drive the aircraft toward a specific bank angle, which implies continued aileron input to move toward that angle. Roll rate provides a command to achieve a certain rate of roll, which also keeps the ailerons engaged to reach and maintain that rate. Altitude hold affects the vertical axis, influencing pitch and thrust rather than directly nullifying the aileron input. So, the follow-up signal is the mechanism that neutralizes the aileron input when appropriate, keeping the airplane steady without unnecessary bank.

In autopilot control, the signal that can effectively cancel or neutralize the aileron command is the follow-up signal. This feedback signal works to counteract the current aileron demand, bringing the net command toward zero when no rolling input is required. In practical terms, it acts as a stabilizing brake on the roll channel so the wings stay level unless a roll command is actively needed.

Attitude command would drive the aircraft toward a specific bank angle, which implies continued aileron input to move toward that angle. Roll rate provides a command to achieve a certain rate of roll, which also keeps the ailerons engaged to reach and maintain that rate. Altitude hold affects the vertical axis, influencing pitch and thrust rather than directly nullifying the aileron input.

So, the follow-up signal is the mechanism that neutralizes the aileron input when appropriate, keeping the airplane steady without unnecessary bank.