Abstract:In order to improve the anti-disturbance ability of the unmanned aerial vehicle Line of sight stabilization platform, a method of visual axis stabilization for the quantitative feedback theory (QFT) and PID composite parallel control is proposed. First, the QFT stabilization controller is designed by loop shaping method, then the QFT is used as main controller and PID is applied to realize the dynamic compensation of QFT. Finally, the simulation experiment is carried out. The results show that the QFT and PID parallel control system reduces the step response stabilization time by 58% and the platform disturbance isolation by 75% compared with the independent QFT control system. The experimental results verify that the method can meet the requirements of the unmanned aerial vehicle for the stability of the visual axis and is superior to the QFT control method.