送交者: Dominatus 于 2005-1-20, 04:56:17:
回答: GPS is likely used. 由 cornbug 于 2005-1-19, 23:21:10:
...go look up something called "Tetrahedral Inertial Platforms (TIP)", no gyro used. Two linear accelerometers side-by-side can can measure linear motion on one axis, plus rotation around a perpendicular axis. TIP uses four arranged on a tetrahedral and a good algorithm to get all the linear and rotational information.
GPS is vulnarable to jamming, disruption, and satellite visibility. That's why "inertial" systems are still a good option.