Abstract:

In order to provide the accurate integrity service, a novel method of reducing the probability of false detection based on receiver autonomous integrity monitoring (RAIM) algorithm is proposed. A new explanation in relationship between the position bias and the residual is proposed. Then the method of expanding the normal detection zone based on the maximal positioning bias integrity risk algorithm is proposed for fault detection. In addition to meet the probabilities of missed detection for the corresponding flight phases, the maximal position error protection limit provides the integrity guarantee for fault detection. Moreover, without reducing the probability of missed detection, a new fault detection and fault identification criterion is designed to decrease the probability of false detection. Simulation results show that the proposed method is simple, feasible and effective.