Autonomous local vertical determination apparatus and methods for a ballistic body
July 3, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2967031 3596523 3699316 Attitude control system Simplified strapped down inertial navigation utilizing bang-bang gyro torquing Method and system for gravity compensation of guided missiles or projectiles Inertially decoupled strapdown system Device for tilting the body of a high-speed vehicle relative to an underframe thereof Heading reference system Polaris guidance system InventorsAssigneeApplicationNo. 675734 filed on 07/03/1996US Classes:73/178R, NAVIGATION244/3.15, Automatic guidance244/171, With attitude sensor means701/4, Altitude or attitude control or indication701/226Space orbits or pathsExaminersPrimary: Williams, HezronAssistant: Moller, Richard A. Attorney, Agent or FirmInternational ClassG01C 021/00AbstractThree 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.Other References
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