Aerospace Instrument-Making Annotation << Back Simultaneous estimation of modal-physical coordinates and parameters at orientation control of large objects of space-system engineering with nonrigid construction T.V. Yermilov, V.M. Sukhanov, A.S. Yermilova The simultaneous coordinate estimation of angular motion, elastic vibrations and parameters of the modal-physical model of elastic space vehicles on the basis of filtration algorithms of the discrete expanded Kalman filter is considered. It is shown, that the synthesized algorithm provides in real time information on coordinates and parameters of the modal-physical model of the elastic space vehicles that is needed for stable and precision control. The method for determination of admissible domains of initial deviations of the model parameters that guarantee the convergence of the identification algorithm is offered. The results of digital simulation of the modal-physical model coordinates estimation with the help of the suggested algorithm are presented.