초록 ▼

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.

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.

대표청구항 ▼

[ Having described the invention, what is claimed as new and secured by Letters Patent is:] [1.] Autonomous navigation apparatus for determining the local vertical direction of a ballistic body of the type having a body spin axis, comprising:(A) a roll gyro, a yaw gyro and a pitch gyro, each gyro be

[ Having described the invention, what is claimed as new and secured by Letters Patent is:] [1.] Autonomous navigation apparatus for determining the local vertical direction of a ballistic body of the type having a body spin axis, comprising:(A) a roll gyro, a yaw gyro and a pitch gyro, each gyro being rigidly fixed to the ballistic body and being responsive to a rate about an input axis that is substantially orthogonal to any other gyro, the roll-rate gyro having its input axis aligned parallel to the body spin axis; and(B) an on-board processor having means for determining the local vertical direction from the gyros.