Strapdown system error inhibition method based on uniaxial four-position rotation and stop scheme

The invention provides a strapdown system error inhibition method based on a uniaxial four-position rotation and stop scheme, which comprises the steps of: (1) determining an initial position parameter of a carrier through a GPS; (2) acquiring data output by an optical fiber gyroscope and output by an acceleration meter and processing the data; (3) positively and negatively rotating and stopping an inertia measuring unit (IMU) around four positions fixed by an azimuth axis of the carrier; (4) converting the data generated by the optical fiber gyroscope and the acceleration meter after rotating the IMU into a navigation coordinate system to obtain a demodulation mode of a constant offset of an inertia device; (5) updating a strapdown matrix Tsn by using an output value Omega iss of the optical fiber gyroscope; and (6) computing the speed and the position of the carrier after rotating and demodulating the IMU.