Control allocation based reconfigurable flight control for aircraft with multiple control effectors

A control allocation based reconfigurable flight controller is presented for aircraft with multiple control effectors because of the redundancy effectors feature. The main idea is to use the remaining control effectors to cancel or compensate the effects of the failure effectors. The control law was designed by trajectory linearization control method, which can provides robust performance at all stages of flight. And the desired moments are the outputs of the trajectory linearization controller. A novel optimal control allocation method, named bases sequence optimal control allocation (BSOCA) method, is proposed to distribute the deflections of control effectors of the aircraft to generate desired moments. A control effectors management system based on BSOCA method is presented to achieve flight reconfiguration under effector failures. The simulation results show that the control allocation based reconfigurable flight controller can adapt the effector failures and maintain stability and acceptable handling qualities.