Nonlinear Robust Control for Spacecraft Attitude
نویسندگان
چکیده
This paper proposed a nonlinear robust control for spacecraft attitude based on passivity and disturbance suppression vector. The spacecraft model was described using quaternion. The control law introduced the suppression vector of external disturbances and had no information related to the system parameters. The desired performance of spacecraft attitude control could be achieved using the designed control law. And stability conditions of the nonlinear robust control for spacecraft attitude were given. The stability could be proved by applying Lyapunov approach. The verification of the proposed attitude control method was performed through a series of simulations. The numerical results showed the effectiveness of the proposed control method in controlling the spacecraft attitude in the presence of external disturbances. The main benefit of the proposed attitude control method does not need angular velocity measurement and has its robustness against model uncertainties and external disturbances.
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