THREE-AXIS STABILIZATION OF A DUMBBELL SATELLITE BY A SMALL CONSTANT-SPEED ROTOR.
JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB
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The paper constitutes a preliminary investigation of the feasibility of achieving three-axis stabilization of a dumbbell spacecraft by the use of a small constant-speed rotor. Linearized equations of motion of the system, which provide a design formula for the rotor characteristics, are given. The results of a digital simulation of the nonlinear differential equations of motion of a spacecraft in a sun-synchronous orbit with passive damping and appropriate disturbing torques are also presented. The results indicate that the use of a small constant-speed rotor to achieve yaw stability is a very effective technique. This semi-passive stabilization system should weigh less and provide more accurate stabilization than a configuration with an unsymmetrical inertia ellipsoid. In addition, important roll and yaw damping should be obtained by supporting the rotor housing with an energy dissipator. Author
- Unmanned Spacecraft