SYSTEM AND METHOD FOR DETERMINING A VELOCITY OF A ROTORCRAFT
FIG6 is a flow diagram illustrating a method of determining a velocity of a rotorcraft
FIG6 is a flow diagram illustrating a method 600 of determining a velocity of a rotorcraft according to some embodiments. Initially, a GPS signal may be received by a GPS of the rotorcraft in block 602. The GPS signal may, for example, be a GPS carrier signal received from a GPS satellite. In block 604, the GPS signal is processed to determine groundspeed data. The GPS signal may be processed to determine a measured frequency of the GPS signal, and that measured frequency may be compared with a reference frequency. Groundspeed data indicating a groundspeed of the rotorcraft may be determined from a difference between the measured frequency and the reference frequency. The GPS signal may be processed by the GPS.
flow diagram
7
andFigure
606
GPS. In block
705
analysis engine
4
value between about
600
method
616
rotorcraft. In block
701
computer system
614
acceleration data. In block
604
GPS satellite. In block
602
rotorcraft in block
608
block
612
703
interface
610
block
707
database
['1. A method of operating a rotorcraft, the method comprising: receiving a GPS carrier signal by a GPS sensor; determining a groundspeed of the rotorcraft based on a received frequency of the GPS carrier signal; receiving acceleration data from an inertial sensor; determining a velocity based on the groundspeed and the acceleration data; determining an actuator command based on the velocity; and controlling a flight control device according to the actuator command.']