Method of preventing potentially hazardously misleading attitude data

摘要

The invention discloses a method of preventing potentially hazardously misleading attitude data. The method includes deriving a value for a leveling parameter from inertial and velocity data, monitoring the leveling parameter for a characteristic indicative of producing potentially hazardously misleading attitude data, and disregarding at least some air data if the characteristic is detected. The computer readable medium contains instructions to cause an attitude heading computer to perform the steps of (1) deriving a leveling parameter from velocity data and inertial data; (2) monitoring the leveling parameter for a characteristic indicative of producing hazardously misleading attitude data; and (3) not accounting for at least some velocity data in leveling algorithms if the characteristic is detected. The invention also includes a second embodiment of a method of preventing potentially hazardously misleading attitude data. The second embodiment includes deriving both pitch and roll leveling rates from velocity data and inertial data. These leveling rates are monitored for a characteristic indicative of producing hazardously misleading attitude data. At least some velocity data is disregarded if the characteristic is detected. The flight control system includes a plurality of attitude/heading computers. A plurality of inertial data sensors are input into the attitude heading computers. A leveling aiding source outputs velocity data as an input into each of the attitude/heading computers.