Electromagnetic helmet orientation determining system.

摘要

An electromagnet system for determining the orientation including position of a helmet worn by a pilot is disclosed having a transmitting antenna (11) for transmitting electromagnetic field vectors, a receiving antenna (12) for sensing the electromagnetic field vectors generated by the transmitting antenna, and a control apparatus (22-62) responsive to the sensed electromagnetic field vectors and the transmitted electromagnetic field vectors for determining the compensated orientation of the helmet, the compensated orientation relying upon the rotation matrix determined by a previous solution for the orientation of the helmet.