A fast responsive and compounded control method for initial phase of small satellite attitude tracking

This paper studies a fast responsive control method to deal with the initial phase control problem of spacecraft-attitude tracking. A “Feedforward Compensation & Error PD & Modified Sliding Mode” compounded control law combining PWPF modulator is proposed to enhance the robustness and the responsive velocity of the MIMO attitude tracking system. The stability of the control law is demonstrated by using a Lyapunov's function. Numerical simulation is presented to illustrate the effectiveness of the control strategy with the present of external disturbance and uncertain inertial parameters.