Final answer:
The stabilator system on aircraft receives airspeed signals from a pitot-static system, which consists of a pitot tube and static ports that measure fluid velocities relevant to aircraft speed.
Step-by-step explanation:
The stabilator system in aircraft utilizes airspeed signals to adjust the position of the stabilator for optimal aircraft control. The airspeed signals originate from an airspeed indicator device, which measures fluid velocities. In the context of aircraft, this is primarily the velocity of air flowing past the aircraft. The device for measuring this is commonly referred to as a pitot-static system, which includes a pitot tube that faces into the airflow to measure dynamic pressure, as well as static ports that measure the ambient air pressure.