SYSTEM AND METHOD FOR MEASUREMENT OF ANGULAR ORIENTATION OF AEROSPACE PLATFORMS

摘要

A method and system are presented for use in determination of the orientation of an aerospace platform with respect to a first rotation axis. A direction of a rotation rate vector of said aerospace platform within a lateral plane intersecting with said first rotation axis is measured and the measured data is analyzed to determine an orientation angle of said aerospace platform about said first rotation axis. The measurement of the direction of the rotation rate vector comprises the following: A predetermined-dynamic state movement of said aerospace platform with respect to an external reference frame is provided, said predetermined-dynamic state movement being characterized by a certain direction of the rotation rate of the platform in said lateral plane, and/or of any time derivative thereof associated with a certain known direction within said external reference frame. While the aerospace platform is in said predetermined-dynamic state movement, said certain direction is determined by measuring a direction of the rotation rate of the aerospace platform within said lateral plane by a sensor assembly mounted on said platform and comprising at least one rotation rate sensor. An orientation of the platform with respect to said first axis is determined by determining a relation between said certain direction and said known direction within said external reference frame.