Abstract:In the dilute-dense atmosphere transition stage of near space vehicles whose reaction control system (RCS) still has residual fuel, it is significant to utilize RCS for the fault compensation and online reconfiguration of non-redundant aerodynamic surfaces. To this end, this paper proposes a self-healing control under the non-redundant aerodynamic surface and thrust vector composite faults to achieve safe and reliable control of the vehicle. First, the attitude control model under actuator faults and uncertainties is established; Second, a residual observation-based fault detection and diagnosis method is presented for actuator faults, and a separation diagnosis strategy for composite faults of RCS and actuators is designed. Then, a self-healing controller for actuator faults compensation is designed based on the nonlinear proportional differential control and estimated fault information. Moreover, a self-healing controller for RCS on-line reconfiguration under compound fault is designed by determining the faulty RCS nozzle sequence. Finally, a typical full trajectory attitude tracking simulations are conducted, which verified effectiveness and reliability of the proposed method.