Pedestrian positioning navigation error correction method and system based on strapdown inertial navigation

The invention provides a pedestrian positioning navigation error correction method and system based on strapdown inertial navigation. The barometers arranged on the vamps and/or the soles are used for obtaining the altitude, and the inertial measurement units are used for obtaining the position postures of pedestrians. And the BP neural network performs training fusion on the altitude and the pedestrian positioning height obtained according to the inertial measurement unit. And judging the zero-speed interval of the pedestrian according to the measured value of the current sampling point, and if the pedestrian is in the zero-speed interval, performing zero-speed correction by combining the fusion height of the training fusion based on volume Kalman filtering so as to update the position and attitude of the pedestrian. The method has the advantages that the fusion height L obtained by fusing the height through the BP neural network is used for replacing Pz in three-axis displacement in a traditional method to