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US 7,127,335 B2Granted
Low airspeed assist algorithm for air data computer applications
AssigneeRosemount Aerospace Inc.
InventorsTracey P. Tschepen, Zachary Alexander Caron
Life of this patent
Estimating the term…
Abstract
A method of estimating the airspeed of an aircraft during low airspeed conditions includes measuring a negative impact pressure using a pitot-static probe on the aircraft. Then, the method includes estimating a non-zero airspeed of the aircraft as a function of the measured negative impact pressure.
Claims11
A method of estimating airspeed of an aircraft during low airspeed conditions, the method comprising:
- measuring a negative impact pressure using at least one pitot-static probe on the aircraft;
- and
- estimating a non-zero airspeed of the aircraft as a function of the measured negative impact pressure and as a function of an impact pressure bias.
A method of estimating airspeed of an aircraft during low airspeed conditions, the method comprising:
- measuring a negative impact pressure using at least one pitot-static probe on the aircraft;
- and
- estimating a non-zero airspeed of the aircraft as a function of the measured negative impact pressure, wherein estimating the non-zero airspeed of the aircraft further comprises:
- calculating a positive corrected impact pressure value as a function of the measured negative impact pressure value;
- and
- estimating the non-zero airspeed of the aircraft as a function of the positive corrected impact pressure value.
3 more elements
An air data system for an aircraft, the air data system comprising:
- means for sensing static pressure and total pressure;
- an air data computer configured to determine impact pressure from the sensed static pressure and total pressure, the air data computer being further configured to estimate non-zero airspeeds of the aircraft as a function of determined negative impact pressures and of an impact pressure bias.
Dependencies are inferred from the claim text.