US 12710552 B2 / Aug 18, 2026

Method and assembly for monitoring the integrity of free inertial position and velocity measurements of an aircraft

Disclosed is a method for monitoring the integrity of an inertial measurement assembly of an aircraft, the measurement assembly comprising at least one high-grade measurement unit; and at least two low-grade measurement units; each of the measurement units comprises a sensor unit and a processing unit coupled to the respective sensor unit, the respective sensor units measure accelerations and angular rates of the aircraft and provide raw data based on said measurements; the respective processing units provide processed data reflecting the velocity and/or attitude of the aircraft; the method comprising: receiving raw data output by the sensor units and evaluating according to at least one predetermined criterion whether the raw data of each sensor unit are consistent with one another; and receiving the processed data output by the processing units and evaluating whether the processed data of each processing unit are consistent with one another.