Abstract
The inertial instrument is the important part of spacecraft control system, its measurement precision is related to the control precision and service life of the spacecraft. During the testing process of spacecraft, the key point is to obtain accurate model of the actual system. In order to identify the actual inertial navigation system error model from test data, a new identification method is proposed. Through the reverse process of strapdown inertial navigation, the ideal inertial instrument output data can be solved from navigation result. The error compensation system can be established, with ideal data input and the actual data of the inertial instrument output. Finally, the error model and error coefficient of inertial instrument can be obtained with the system identification method. The test results show that the method is effective and has reference value and directing significance for engineering application.
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