AFRL Successfully Tests Automated Refueling Subsystem Published Dec. 4, 2006 By Air Vehicles Directorate AFRL/VA WRIGHT-PATTERSON AIR FORCE BASE, Ohio -- AFRL completed a successful flight test of an automated aerial refueling ( AAR), inner- loop control laws (IL CLAWS) system. A flight control computer (FCC) hosted the IL CLAWS system, which interfaced with the Calspan Learjet variable stability system (VSS) using discrete, analog signals. As part of the test, engineers installed the FCC on a Calspan Learjet to guide the vehicle through a series of calibration inputs and parameter identification maneuvers. The FCC maneuvered the vehicle successfully, confirming successful FCC/Learjet integration and validating computer modeling, with only minor discrepancies. AFRL scientists will use this test data for their upcoming AAR station-keeping test, where the Learjet will undergo autonomous control by the FCC through the VSS. The FCC will use precision Global Positioning System, inertial navigation systems, and tanker-datalink signals as sensor inputs to the control laws. The Learjet will fly in station-keeping maneuvers next to a KC-135 tanker, matching the tanker's movements. By providing a means to refuel unmanned air vehicles (UAV), AAR technologies will benefit future UAVs by extending their range and allowing their deployment with manned fighters, shortening the response for time-critical targets, and maintaining an in-theater presence with fewer assets.