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US 6,205,401 B1Granted
Navigation system for a vehicle, especially a land craft
AssigneeLITEF GmbH
InventorsFriedhelm Pickhard, Detlev Wick
Life of this patent
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AssigneeLITEF GmbH
InventorsFriedhelm Pickhard, Detlev Wick
Estimating the term…
The invention relates to a navigation system for a vehicle, in particular for a land vehicle, having at least one single-axis gyro for the vehicle vertical axis (z axis), having two accelerometers in the horizontal vehicle plane (x axis, y axis), and having a vehicle-axis velocity measurement device, for example, a distance-travelled sensor. In addition, supporting signal devices, in particular a satellite receiver and/or a map, are available as well as a controller, which uses a suitable Kalman filter to determine the vehicle position and/or the direction of travel from the measured and stored signals. The Kalman filter is assigned at least one partial filter, of which a first partial filter is used for dynamic levelling and/or a second partial filter is designed as a position filter which provides track calibration, position calibration and sensor calibration.
In a navigation system for a vehicle of the type having at least one single-axis gyro for the vehicle vertical axis z, and x and y axis accelerometers in the horizontal vehicle plane, a vehicle-fixed velocity measurement device and an augmentation device, especially at least one of satellite navigation receiver or a map device, for augmenting position or velocity of the vehicle or both and a controller for correcting at least one of the calculated vehicle position and direction of travel via a suitable Kalman filter using measured signals supplied from said augmentation device comprising, in combination:
Dependencies are inferred from the claim text.