Trajectory environment characteristic identification method using multi-sensor information fusion

The invention provides a trajectory environment characteristic identification method using multi-sensor information fusion. The trajectory environment characteristic identification method comprises the following steps: performing frequency domain characteristic analysis on magnetic field information of a projectile by using a triaxial magnetic sensor to obtain a rotating speed and an angular speed of the projectile; obtaining the airspeed of the projectile through dynamic pressure and static pressure measurement information, and determining the speed scalar value of the projectile in the whole process according to pre-bound ground wind speed information; and carrying out extended Kalman filtering by taking the speed scalar, the projectile rotating speed and the angular velocity information as observed quantities, taking triaxial acceleration information obtained by a triaxial accelerometer as system input quantities, and taking projectile trajectory environment characteristic parameter information as system s