Patent ID: 9285387
Filing Date: 2016-03-15
CPC Classification: G01F,G01P

Claim Text:
1. A GPS-based computer-implemented method for determining pitot-static tube pressure sensing error of an aircraft in flight, comprising the steps: outfitting an aircraft with at least one pitot-static tube; collecting, from an aircraft's global positioning system (GPS) while the aircraft is in flight, UPS based ground speed measurements; collecting, from the aircraft's one or more atmospheric sensors while the aircraft is in flight, measurements of atmospheric conditions; collecting, from the aircraft's pitot-static tube while the aircraft is in flight, pitot-static tube total pressure and static pressure as a function of airspeed; determining measured impact pressure from said pitot-static tube total pressure and static pressure while the aircraft is in flight; inputting said ground speed measurements, said atmospheric conditions; and said measured impact pressure into a selected pressure error model that models pitot-static tube pressure sensing error as a continuous function of airspeed while the aircraft is in flight; adjusting automatically, with a processor, one or more pressure error model parameters of the pressure error model using an output-error optimization algorithm to produce an automatically adjusted pressure error model while the aircraft is in flight; and determining, with the processor, pitot-static tube pressure sensing error as a function of airspeed using said automatically adjusted pressure error model while the aircraft is in flight.