Abstract:

 With regard to the coordinated control commands allocation with over-actuated actuator failures,a reconfigurable control allocation scheme is proposed by adaptively modifying fault actuator control weights.A modular flight control system is constructed by introducing a virtual control command. Taking into account the mechanical constraints, the fault actuator model of a multi-effectors aircraft is established. Integrated with multi-objective optimal allocation, the command weight matrix of fault control surfaces is adjusted in the descending direction relative to control objective gradients to ensure adaptive modification of the fault actuators. Simulation results show that the proposed scheme can combine control efficiency of fault control
surfaces, coordinate the control commands effectively without chattering, and realize control reconfiguration.

Key words: flight control, over-actuated system, actuator failure, reconfigurable control allocation