Data processing: vehicles – navigation – and relative location – Navigation – Employing position determining equipment
Patent
1996-05-22
1999-09-07
Nguyen, Tan Q.
Data processing: vehicles, navigation, and relative location
Navigation
Employing position determining equipment
701 4, 701 14, 244 32, 244177, G06F16500, F41G 736
Patent
active
059480459
ABSTRACT:
A method for determining the initial conditions for an inertial measurement nit (IMU) of a second vehicle launched from a wing of a first vehicle is provided. The method includes the steps of defining a state vector x as including (a) the rotation .zeta. of the computed coordinate axes with respect to the real coordinate axes of the second vehicle and (b) the projection .delta..alpha. along the Z axis of the first vehicle of the rotation of the second vehicle from its nominal coordinate axes to its real coordinate axes. A measurement z is defined as the projection .delta..beta. of a rotation angle .beta., along the Z axis of the first vehicle, between the nominal coordinate axes and a current computed coordinate axes. The method also includes the steps of estimating x over time with a Kalman filter, wherein the projection .delta..beta. is the measurement vector and the state vector x changes only due to random noise and processing x to produce the attitude about the Z axis of the first vehicle.
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Nguyen Tan Q.
State of Israel-Ministry of Defense Armament Development Authori
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