Attitude Control of Five Degrees of Freedom Air-Bearing Platform Based on Fractional Order Sliding Mode

Spacecraft attitude determination and control hard verification and software development can be simultaneously simulated with five degrees of freedom air-bearing spacecraft simulator. In this paper, a new robust fractional order sliding mode controller is proposed for simulator attitude control with control input limited amplitude under considering gravity unbalance torque disturbance and actuator assembling error. The attitude system can convergence to fractional order sliding mode surface within the finite time, which is proven by using fractional order Lyapunov stability theory. Furthermore, numerical simulations are also included to reinforce the analytic results and to validate the excellent effect of the new robust fractional sliding mode controller.