| 摘要 |
<p>Two GPS units (18, 20) are mounted at two separate points on the body (12) of a work machine (10) to periodically measure their three-dimensional coordinates with respect to a chosen reference system. A plane is fitted through four points so collected and it is used to determine the current orientation of the machine. As each additional set of position data is collected at predetermined intervals for the two points on the machine, a new plane equation is calculated to update the orientation of the machine based on a predetermined number of prior measurements. Standard-deviation analysis is used to check the validity of each plane calculation. Based on the current coordinates of the two GPS antennas, the current orientation plane so calculated, and the known geometry of the work machine, the current position of its critical components (14, 16) can be determined as well.</p> |
