Patent ID: 7711483
Filing Date: 2010-05-04
Classification: G01C

Abstract:
1. A method of dead reckoning navigation for a vehicle using a plurality of accelerometers, comprising: determining an orientation between the sensor frame of reference and a body frame of reference for the vehicle using sensed accelerations from the accelerometers; and determining a dead-reckoning longitudinal acceleration for the vehicle by converting sensed accelerations from the accelerometers according to the determined orientation between the sensor frame of reference and the body frame of reference, wherein determining the orientation of the vehicle comprises: with the vehicle in a state selected from the set consisting of a stationary state and an un-accelerated state, calculating a pitch angle and a roll angle between the sensor frame of reference and a body frame of reference for the vehicle using sensed accelerations from the accelerometers; and with the vehicle accelerated without turning, calculating a yaw angle between the sensor frame and the body frame using sensed accelerations from the accelerometers.