Methods to improve the efficiency of estimating characteristics of strapdown inertial navigation systems at flight tests

The report deals with the results of a research aimed at creating an advanced technology for integrated assessment of strapdown inertial navigation systems (SINS) on the basis of the digital and full-scale method. Only the autonomous channel of SINS integrated with a navigation satellite system is considered. New and existing methods and means for assessing characteristics of advanced SINS have been developed and enhanced in order to issue recommendations concerning the increase of their precision characteristics. On the basis of the existing “Etalon” software system (SS) software systems “Etalon-XXI” and “Etalon-MK” have been developed. The advanced technology of testing at all test stages including SINS certification flight tests has been created. The developed technology will allow to increase informational content of the characteristics analysis, to reduce terms and cost of flight tests and certification of SINS. Application of the developed methods and means is shown on the examples of the assessment of the BIMS-T inertial and satellite systems installed onboard the Il-76MD flying laboratory (FL) and the Il-96-300 aircraft, LINS-100RS installed onboard the maneuverable MiG-29UB flying laboratory.