A method of strong tracking UKF based on adaptive constraints

As for the difficulty of detecting fault in the non-linear system, the theorem to achieve new UKF condition 2 is deducted. Based on adaptive strong tracking UKF, a fault detect method is proposed. Fast solution which has the limitation on adaptive time-varying is designed to improve the speed of solving the time-varying fading matrix. At last, the results of UKF, fading UKF and adaptive limitation strong tracking UKF are compared. The simulation results show that adaptive limitation strong tracking UKF can diagnose the sensor fault precisely in the flight control system and it also can detect the sudden change in state fast and smoothly.