Spacecraft thruster torque feedforward calibration system
AssigneeLockheed Martin Corporation
InventorsHarald J. Weigl, Neil E. Goodzeit
Life of this patent
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Abstract
A spacecraft includes a plurality of thrusters, a thruster firing logic, an actuator assembly, an attitude control system, and a torque calibration system. The plurality of thrusters is configured to apply torque to the spacecraft. The thruster firing logic is configured to control firing of the plurality of thrusters. The actuator assembly is configured to apply torque to the spacecraft. The attitude control system is configured to sense an attitude of the spacecraft and to provide an attitude control torque. The torque calibration system is configured to provide a thruster feedforward torque. A machine-readable medium includes instructions for a method for providing torque calibration to a spacecraft.
Claims9
A torque calibration system for a spacecraft, the torque calibration system comprising:
- a thruster torque error estimator configured to receive thruster firing information and an attitude control torque and to provide thruster torque correction;
- and
- a thruster torque archive configured to receive thruster firing information and thruster torque correction, to store a thruster feedforward torque based on thruster torque correction, to select a thruster feedforward torque stored in the thruster torque archive based on thruster firing information, and to provide the selected thruster feedforward torque to apply torque to the spacecraft.
Dependencies are inferred from the claim text.