Study on Shafting Calibration Technology of INS/CNS Integrated Navigation System

Abstract

As a high precision attitude measurement device, the INS/CNS integrated navigation system has error order of second and installation and calibration precision of minute. The calibration residue of installation error directly affects attitude determination and positioning precision. The paper discusses calibration method of sub-system installation error, and expounds calibration principles of INS/CNS integrated navigation system. According to overall technical solutions, this paper studies shafting calibration error transfer characteristics of INS/CNS integrated navigation system, and puts forward calibration solution for the system. It mainly analyzes impact of multiple error factors during system calibration such as installation error and measurement instrument error on the integrated system, models and analyzes countershaft inclination effect, coaxial error and zero position calibration, optimizes calibration method for the system and improves installation error calibration precision.