Fast and precise initial alignment of strapdown inertial navigation system on rolling base

The rolling base and the lever arm error are major factors affecting the performance of carrier weapons. Based on the initial alignment characteristic of strapdown inertial navigation system (SINS) on carrier weapons, the mechanism and compensatory method of the lever arm were analyzed. The feasibility of replacing the Kalman filtering by parameter identification to align a strapdown inertial naviagtion system SINS on a rolling base was thoroughly investigated. Taking into account instances of the real engineering applications, an improved parameter identification method to align a SINS was proposed. Furthermore, the improved parameter identification method to align strapdown inertial navigation system on a rolling base was studied via simulations. The precision of initial alignment can be improved, as well as speediness. The investigative results would offer the principle foundation for design and choice of the alignment schemes of SINS for carrier weapons.