| 摘要 |
A system comprises at least one inertial sensor (102) operable to provide inertial sensor data during a trip; a processing unit (104) coupled to the at least one inertial sensor (102), the processing unit operable to calculate navigation data based on the inertial sensor data and to estimate error in the inertial sensor data, wherein the processing unit (104) is further operable to adjust subsequent inertial sensor data received during the trip from the at least one inertial sensor (102) in order to compensate for the estimated error; and a memory (110) coupled to the navigation unit and operable to store data between power cycles; wherein the processing unit (104) is further operable to calculate a current trip error estimate from a plurality of error estimates during the trip and to estimate a repeatability error component based on the current trip error estimate and previous trip error estimates stored in the memory (110); wherein the repeatability error component is stored in the memory, the processing unit (104) being further operable to update inertial sensor data during a subsequent trip based on the repeatability error component. |
