Method and apparatus for correcting dynamically induced errors in static pressure, airspeed and airspeed rate
AssigneeAlliedSignal Inc.
InventorHans R. Muller
Life of this patent
Estimating the term…
Abstract
A system for correcting errors in static pressure, airspeed or airspeed rate caused by maneuvering that causes variations in static air pressure measurements compares a barometrically derived vertical velocity or altitude signal with an inertially-derived vertical velocity or altitude signal to provide a correction signal that is representative of changes in static air pressure and is used to correct the static pressure, airspeed or airspeed rate signal.
Claims20
A rate of change of airspeed correction system for aircraft, comprising:
- means for providing an airmass derived signal representative of the vertical velocity of the aircraft;
- means for providing an inertially-derived signal representative of the vertical velocity of the aircraft;
- means for comparing the airmass derived and inertially-derived vertical velocity signals and providing a vertical velocity difference signal in response to the difference between the airmass and inertially-derived vertical velocity signals;
- and
- means responsive to said difference signal for providing an airspeed rate correction signal in response to the magnitude of the difference signal.
A method for correcting an airspeed signal for errors introduced by static pressure errors, comprising:
- comparing pitot pressure and static pressure to provide an indication of airspeed;
- comparing an inertially-derived vertical velocity signal with an airmass derived vertical velocity signal to provide an error signal in response to the difference therebetween;
- and
- utilizing said error signal to correct said airspeed indication.
A method for correcting an uncorrected airspeed signal for errors introduced by static pressure errors, comprising:
- utilizing the uncorrected airspeed signal to determine the differential pressure between pitot pressure and static pressure;
- comparing an inertially-derived vertical velocity signal with an airmass derived vertical velocity signal to provide an error signal in response to the difference therebetween;
- correcting the differential pressure between pitot pressure and static pressure utilizing the error signal to provide a corrected difference signal;
- and
- utilizing the corrected difference signal to provide a corrected airspeed signal.
A method for correcting an airspeed rate signal for errors introduced by static pressure errors, comprising:
- comparing an inertially-derived vertical velocity signal with an airmass derived vertical velocity signal to provide an error signal in response to the difference therebetween;
- providing an airspeed signal based on the difference between pitot pressure and static pressure;
- and
- utilizing the error signal and the airspeed signal to generate an airspeed rate error signal.
A method for compensating for dynamically induced errors in static pressure readings, comprising:
- providing an airmass derived vertical velocity signal;
- providing an inertially-derived vertical velocity signal;
- determining the difference between said airmass derived and inertially-derived vertical velocity signals to provide an error signal;
- and
- utilizing said error signal to compensate the static pressure reading.
An airspeed correction system for aircraft, comprising:
- means for providing an airmass derived signal representative of the vertical velocity of the aircraft;
- means for providing an inertially-derived signal representative of the vertical velocity of the aircraft;
- means for comparing the airmass derived and inertially-derived vertical velocity signals and providing a vertical velocity difference signal in response to the difference between the airmass and inertially-derived vertical velocity signals;
- and
- means responsive to said difference signal for providing an airspeed correction signal in response to the magnitude of the difference signal.
A static pressure correction system for aircraft, comprising:
- means for providing an airmass derived signal representative of the vertical velocity of the aircraft;
- means for providing an inertially-derived signal representative of the vertical velocity of the aircraft;
- means for comparing the airmass derived and inertially-derived vertical velocity signals and providing a vertical velocity difference signal in response to the difference between the airmass and inertially-derived vertical velocity signals;
- and
- means responsive to said difference signal for providing a static pressure correction signal in response to the magnitude of the difference signal.
A rate of change of airspeed correction system for aircraft, comprising:
- means for providing an airmass derived signal representative of the altitude of the aircraft;
- means for providing an inertially-derived signal representative of the altitude of the aircraft;
- means for comparing the airmass derived and inertially-derived altitude signals and providing a difference signal in response to the difference between the airmass and inertially-derived altitude signals;
- and
- means responsive to said difference signal for providing an airspeed rate correction signal in response to the magnitude of the difference signal.
A method for correcting an airspeed signal for errors introduced by static pressure errors, comprising:
- comparing pitot pressure and static pressure to provide an indication of airspeed;
- comparing an inertially-derived altitude signal with an airmass derived altitude signal to provide an error signal in response to the difference therebetween;
- and
- utilizing said error signal to correct said airspeed indication.
A method for correcting an uncorrected airspeed signal for errors introduced by static pressure errors, comprising:
- utilizing the uncorrected airspeed signal to determine the differential pressure between the pitot pressure and the static pressure;
- comparing an inertially-derived altitude signal with an airmass derived altitude signal to provide an error signal in response to the difference therebetween;
- correcting the differential pressure between pitot pressure and the static pressure and utilizing the error signal to provide a corrected difference signal;
- and
- utilizing the corrected difference signal to provide a corrected airspeed signal.
A method for correcting an airspeed rate signal for errors introduced by static pressure errors, comprising:
- comparing an inertially-derived altitude signal with an airmass derived altitude signal to provide an error signal in response to the difference therebetween;
- providing an airspeed signal based on the difference between pitot pressure and static pressure;
- and
- utilizing the error signal and the airspeed signal to generate an airspeed rate error signal.
A method for compensating for dynamically induced errors in static pressure readings, comprising:
- providing an airmass derived altitude signal;
- providing an inertially-derived altitude signal;
- determining the difference between said airmass derived and inertially-derived altitude signals to provide an error signal;
- and
- utilizing said error signal to compensate the static pressure reading.
An airspeed correction system for aircraft, comprising:
- means for providing an airmass derived signal representative of the altitude of the aircraft;
- means for providing an inertially-derived signal representative of the altitude of the aircraft;
- means for comparing the airmass derived and inertially-derived altitude signals and providing a difference signal in response to the difference between the airmass and inertially-derived altitude signals;
- and
- means responsive to said difference signal for providing an airspeed correction signal in response to the magnitude of the difference signal.
A static pressure correction system for aircraft, comprising:
- means for providing an airmass derived signal representative of the altitude of the aircraft;
- means for providing an inertially-derived signal representative of the altitude of the aircraft;
- means for comparing the airmass derived and inertially-derived altitude signals and providing a difference signal in response to the difference between the airmass and inertially-derived altitude signals;
- and
- means responsive to said difference signal for providing a static pressure correction signal in response to the magnitude of the difference signal.
Dependencies are inferred from the claim text.