Aerospace Instrument-Making Annotation << Back Federal State Unitary Enterprise “Siberian research institute of aviation named after S.A. Chaplygin” V.A. Berns The nonlinear equations of the forced vibrations of the control element and the stock of hydraulic damper taking into account of rigidity and damping of the control run and damper, dry friction in the damper sealing and gap in the units of its fastening have been made. The equations parameters are determined by the methods of identification according to the results of the control element resonant tests. The solution of the vibration equations is carried out by the method of harmonic linearization. The dependence of rigidity and damping of the control element from the parameters of damper are investigated. Key words: control element, hydraulic damper, resonant tests, identification. E-mail: v.berns@yandex.ru