Research Of SINS Monitor Technique

Strapdown INS is a type of Inertial Navigation Systems.Compared with Platform INS, Strapdown INS has the advantages of low volume, low weight, low cost and high reliability. Strapdown INS leads the trend of INS.In order to improve the system accuracy of Strapdown INS, in addition to improving the accuracy of inertial components, it can be used SINS itself self-correction technique to eliminate error affected the accuracy of the system automatically. It does specific analysis and research for the monitoring system on the strapdown inertial system.It adopt different rules rotation. After comparation and analysis of the simulation, it can be found a better way of monitoring, so as to chieve the purpose of improving system accuracy.In the paper, the following works have been done:It is introduced that the basic operation principle of SINS, including several kinds of coordinates and the relations between them, classical attitude algorithms of Euler horn and quaternion,and the accounting cycle etc.At last, the simulaiton experiments of the system are carried out.It is introduced that the basic principles and composition of SINS monitoring methods.It is analysised that the basic principles of Gyro monitoring technology,including several programmes of Gyro Monitor. It is discussed the feasibility of SINS monitoring methods and the resulting benefits.It is derived the dynamic error model of SINS. It is introduced that the rotation axis which is led to by the monitoring method, as well as the direction cosine coordinates trasform between rotation coordinate and vector coordinates. Finally, for several different ratations, the simulation experiments of SINS Monitoring System are respectively are carried out. After analysis and comparition, it is elected a ratation manner of the best monitoring results.