Autonomous local vertical determination apparatus and methods fo

Details Autonomous local vertical determination apparatus and methods fo Autonomous local vertical determination apparatus and methods fo

1996-07-03

1999-03-23

Williams, Hezron

Measuring and testing

Navigation

Take-off and landing monitors

244 315, 244171, 364459, 364424013, G01C 2100

Patent

active

058862579

ABSTRACT:
Three rate gyros are mounted to a ballistic body to provide an autonomous navigation system. A roll gyro, a yaw gyro and a pitch gyro are rigidly fixed to the ballistic body. Each gyro is arranged to be responsive to a roll rate about an input axis that is substantially orthogonal to any other gyro. The roll-rate gyro has its input axis aligned parallel to the body spin axis. An on-board processor utilizes recursive Kalman-filtering to determine the roll angle, i.e., the local vertical direction, from the gyro outputs.

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