ADRC-based Longitudinal Control for Novel Flight Vehicle with Moving Mass

An adaptive longitudinal control law for moving mass control of a novel flight vehicle configuration is proposed. The coupling dynamic model between angle of attack and deflection of moving mass is generated. The dynamic analysis indicates that the proposed moving mass configuration with larger mass ratio gives rise to more dynamic coupling and maneuverability. Moreover, the control authority is determined by the mass ratio of the moving mass and the difference between the mass center of the moving mass and the mass center of the vehicle body. To deal with the coupling caused by the additional inertia moment of moving mass, the coupling dynamics system is transformed into a cascade system for controller design. Active disturbance rejection control framework is employed to design the adaptive longitudinal controller. Its extended state observer estimates the total disturbance to overcome the uncertainties in the flight vehicle model. The simulation results show that the proposed configuration is feasible and validate the quality of the adaptive controller which ensures good performance.