Spacecraft yaw control using only wheel speed measurements proce

Details Spacecraft yaw control using only wheel speed measurements proce Spacecraft yaw control using only wheel speed measurements proce

1995-11-03

1998-07-28

Chin, Gary

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Aeronautical vehicle

701226, 244164, 244166, B64G 124

Patent

active

057873682

ABSTRACT:
An attitude or orientation control system for spacecraft that provides for yaw axis error reduction and momentum dumping using a simple calculation involving only the momentum wheel speeds as input and which outputs two axis (roll and yaw) torque commands. The system utilizes the spacecraft 1) momentum wheels that store spacecraft momentum, 2) processing means for the calculation of control torques, and 3) torque actuators, e.g., magnetic torquers, that can provide a torque axis anywhere in the spacecraft roll/yaw plane, and involves three fundamental steps, 1) the input of the momentum wheel speed mearsurements, and 2) the calculation of the required torques, using the wheel speed measurements, and and 3) the outputting of the required torques in a form appropriate for controlling the available actuators.

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Lebsock, K.L., "Magnetic Desaturation of a Momentum Bias System", vol. 6, No. 6, Nov.-Dec. 1983.

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