Strap down roll reference
Patent 4676456 Issued on June 30, 1987. Estimated Expiration Date: 
November 27, 2005. 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.
November 27, 2005. 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 ReferencesActive nutation control system for space vehicle Control of nutation in a spacecraft SSICM guidance and control concept Patent #: 4542870 InventorsAssigneeApplicationNo. 06/802496 filed on 11/27/1985US Classes:244/3.21, Attitude control mechanisms244/3.23Stabilized by rotationExaminersPrimary: Bentley, Stephen C.Assistant: Johnson, Stephen M. Attorney, Agent or FirmInternational ClassesG05D 1/10 (20060101)F41G 7/20 (20060101) F41G 7/22 (20060101) AbstractApparatus and method of determining a roll reference for strap down seeker in a spinning projectile is shown to consist of the steps of: (a) determining the frequency spectrum of signals out of an accelerometer disposed in such missile to be sensitive to roll, precession and nutation forces; (b) separating the signals caused to the roll forces; and (c) processing the separated signals to determine the roll reference. | |
