| 摘要 |
<p>The system comprises three detection units (1, 2, 3) providing the gyrometric, accelerometric and magnetometric components with respect to an orthogonal 3D set of axes fixed in the aircraft (body axes). A computer (4) calculates, from the gyrometric data, a projection matrix of the said components with respect to the local geographical set of axes. Means are also provided for determining, from the data supplied by the gyrometric and accelerometric units, the horizontal components of the attitude error with respect to the longitudinal-transverse set of axes. There are also means for projecting the said magnetometric components with respect to the local geographical set of axes with the help of the said matrix and for determining the heading error with respect to the longitudinal-transverse set of axes. Means (16) are provided for calculating the corrections to be made to the gyrometric measurements with respect to the body axes, particularly from the said attitude and heading errors. This system does not require special sensors which are difficult to produce or which are difficult to adjust. <IMAGE></p> |
