Predictive roll capture
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorsDavid Schorr, James H. Steenson, Jr.
Life of this patent
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Abstract
A method for controlling autopilot roll capture of a rocket comprising adapting the start time and the rate of roll capture such that regardless of the initial rocket spin rate, the roll capture process is completed at a predetermined time.
Claims17
A method for controlling autopilot roll capture of a rocket comprising:
- calculating a start time for de-spin of the rocket;
- and
- implementing a rate of de-spin of the rocket such that regardless of an initial rocket spin rate, the roll capture process completes at a predetermined time based on the calculated start time and the implemented rate of de-spin.
A method for controlling autopilot roll capture of a rocket comprising the steps, where T is current time, Wp is current spin rate, and Wpdot is spin rate deceleration:
- calculating a roll capture start time based on Wp, a selected Wpdot and a predetermined roll capture completion time;
- waiting for T to reach the calculated roll capture start time;
- implementing the selected Wpdot;
- and
- monitoring Wp.
An autopilot roll capture apparatus for a rocket comprising the steps, where T is current time, Wp is current spin rate, and Wpdot is spin rate deceleration:
- a processor to calculate a roll capture start time based on Wp, a selected Wpdot and a predetermined roll capture completion time;
- a timer to wait for T to reach the calculated roll capture start time;
- an implementation unit to achieve the selected Wpdot;
- and
- a sensor to monitor Wp.
Dependencies are inferred from the claim text.