Inertial navigation positioning method based on CCD (Charge Coupled Device) star sensor and accelerometer

The invention provides an inertial navigation positioning method based on a CCD star sensor and an accelerometer, which comprises the following steps of: (1) after initial alignment is finished, acquiring the output data of the quartz flexible accelerometer; (2) acquiring the output of the CCD star sensor; (3) acquiring the output positioning information in an inertial navigation algorithm in an error-free state to obtain the transfer matrix of an earth based coordinate system, i.e. an e system relative to a navigation coordinate system, i.e. an n system; (4) solving the transfer matrix of the e system relative to an i system; (5) resolving to obtain an attitude matrix through the information given in the steps (1), (2), (3) and (4); and (6) converting the accelerometer onto the navigation coordinate system from a carrier coordinate system through the attitude information resolved in the step (5), and outputting the carrier speed and the navigation positioning information. The invention has position information feedback, thereby having the advantages of periodicity and high positioning precision.