Single-Axial Rotation Modulation SINS Indexing Scheme

Single-axis rotation strapdown inertial navigation system (SINS) is studied in this paper. A new rotation scheme is proposed to solve the problem that carrier motion has not been isolated which would cause incomplete error compensation leading to a considerable error. Based on the principle of rotation SINS, the traditional four-position rotation-stop method is revised to get the new rotation scheme. By using the proposed method, the errors caused by carrier motion are periodically compensated. In this way, the accuracy of the system can be greatly raised and the complexity of the system can also be reduced. Computer simulation has been taken for vehicles and vessels, and the result shows that the program can depress the constant drift errors caused by the carrier motion without isolating the carrier motion.