Method for fast and accurately compensating component periodic error in strap-down inertial guidance

In one kind of strapdown inertial navigation device cycle error compensation method of quickly and accurately, according to the device-level data analysis, using the error conversion formula, converted into a real-time navigation solution included in the system level error count data and the amount of compensation. Wherein the error conversion formula determined as follows: oversampled raw data for analysis within the device level taken some time, determine significant periodic error term comprising a device-level raw data and the number of the measured characteristic parameter, calculated according to the formula derived the error of each conversion coefficient formula, the conversion formula is substituted into the error. The present invention takes full advantage of the periodic error item information contained in the device-level raw data, but also have the advantage of system-level data on the amount of calculation processing, high compensation accuracy, a small amount of calculation. The present invention is applicable to various oversampled data periodic error term compensation process, in particular cyclic error term compensation process applied to an inertial navigation system gyroscope and accelerometer output data.