Aerospace Instrument-Making Annotation << Back Analysis of properties of semianalytic inertial navigational system and its strapdown analog Yu.V. Chebotarevsky, P.K. Plotnikov, V.Yu. Chebotarevsky The kinematic scheme of the platform semianalytic inertial navigational system and the principal equations for determination of its errors and navigational parameters are considered. The principal properties of semianalytic inertial navigational system are formulated on base of these equations. The functional scheme of strapdown inertial navigational system (SINS) is described; the functioning algorithms are made on its base. The equations of errors with use similar with semianalytic inertial navigational system bases and variables are deduced. It is shown that for the identical conditions of movement of mobile object (MO) the identical with semianalytic inertial navigational system the differential equations of SINS errors are received. This fact witnesses about the analogy of semianalytic inertial navigational system’s and SINS’s properties: also about asymptotic stability of equations solution of both systems under application of positional correction, of Schuler’s conditions applicability and so on. Therefore, it is expediently to apply the considered SINS on the same MO in the same operational conditions as semianalytic inertial navigational system.