It is necessary to provide the separation of the inherent object modes from the sensor signals and to make possible independent affecting the modes with the use of actuators when realizing the modal system of controlling an elastic object with distributed parameters. The present paper puts forward an identification procedure which allows separating the vibration modes of the object in measured and control signals in the absence of the object model simulation. The control operability of this procedure was verified by experiment through making a system of the active suppression of forced bending vibrations of a metal beam. The experiment showed the high control efficiency of the realized modal system.