Application of precision measuring equipment in inertial navigation system error testing

摘要

The errors of the two inertial units of gyroscope and accelerometer are the main error sources affecting performance of platform inertial navigation system. It is the important way to measure and compensate these errors in real-time accurately in inertial navigation system for initial alignment accuracy and navigation performance of inertial navigation system improvement. In this paper, high accuracy synchronizing electric bridge, digital phase meter, digital voltmeter and integrated collection computer make up a set of closed-loop testing system to real-time measure and accurately separate gyroscope drift and accelerometer error for the whole working process of inertial navigation system. Initial alignment accuracy and navigation performance of inertial navigation system can be improved remarkably through model and compensate for different error sources.