Aerospace Instrument-Making Annotation << Back J-ADAPTIVE FILTER WITH VARIOUS IDENTIFICATION PARAMETERS IN EQUITIONS OF DYNAMICS AND OBSERVATIONS FOR NONLINEAR DYNAMIC SYSTEMS. II V.M. Terentiev O.V. Mikhailova The paper illustrates proper operation of a new J-adaptive filter with various identifica-tion parameters, included in the equations of dynamics and observations, by way of ex-ample of the estimation of the relative-motion parameters of two unmanned aerial vehi-cles (UAVs). This problem has an independent and practical importance because it deals with data integration of an autonomous system of measurements (range, line-of-sight angles and their derivatives) and a relative-navigation system of associated UAVs with the use of a data exchange system as applied to the synthesis of interaircraft navigation systems. The data integration has been performed with the application of the invariant theory and the information distribution principle associating the relative-acceleration vector with the measurement control vector. The investigations have been conducted with a different set of measurements. The results show the possibility of excluding some relative-motion parameters from an excess set of measurements. The comparison of the accuracies of the J-adaptive filter and extended Kalman filter has been made resulting in the conclusion that it is practicable to apply the synthesized J-adaptive filter. The results of modeling of the J-adaptive filter considered are presented. Key words: J-adaptive-filter, estimation, relative motion, interaircraft navigation system, UAV (un-manned aerial vehicle), identification. Contacts: E-mail: pilot@kbpa.ru Pp. 19-32.