Vehicle dynamics measuring apparatus and method using multiple GPS antennas
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United States of America Patent
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Dec 30, 2003
Grant Date -
Aug 7, 2003
app pub date -
Feb 5, 2002
filing date -
Feb 5, 2002
priority date (Note) -
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Abstract
An apparatus and method for measuring dynamic movement of a vehicle (10) by employing multiple GPS satellites and determining velocity based change in the carrier frequency of multiple satellite signals. The apparatus includes at least two GPS receiving antennas (12a and 12b) installed on a vehicle (10) at known locations and a controller (20) for processing received GPS signals (16a-16c) and monitoring a carrier frequency associated with the GPS signals. The controller (20) determines a change in the carrier frequency of the GPS signals due to Doppler effect. The controller (20) further determines a first inertial velocity vector of each of the receiving antennas (12a and 12b) based on the change in carrier frequency, and determines angular rate of the vehicle based on the inertial velocity vectors. The controller (20) further determines vehicle longitudinal and lateral velocity and acceleration as a function of the inertial velocity vectors.
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