Invention Grant
- Patent Title: Energy-angular momentum closed-loop guidance for launch vehicles
- Patent Title (中): 运载火箭的能量角动量闭环指导
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Application No.: US13760189Application Date: 2013-02-06
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Publication No.: US08571727B1Publication Date: 2013-10-29
- Inventor: Russell Paul Patera
- Applicant: The Aerospace Corporation
- Applicant Address: US CA El Segundo
- Assignee: The Aerospace Corporation
- Current Assignee: The Aerospace Corporation
- Current Assignee Address: US CA El Segundo
- Agency: Leonardpatel PC
- Main IPC: B64G1/24
- IPC: B64G1/24

Abstract:
An improved method for launch vehicle guidance is disclosed. A pre-computed energy-angular momentum (E-J) curve to place a launch vehicle into a target orbit is received and stored. An energy, angular momentum, radial distance, velocity magnitude, and flight path angle of the launch vehicle are computed from state vector data while the launch vehicle is traveling to the target orbit. The pre-computed E-J curve and the computed energy, angular momentum, radial distance, velocity magnitude, and flight path angle of the launch vehicle are used to determine pitch and pitch rate of the launch vehicle.
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