Abstract: A random vibrations testing device comprising a noise generator the output whereof is connected to an input of a wide-band filter. An output of the wide-band filter is connected directly and through paralleled narrow-band in-phase signal shaping channels to a means for shaping dips and spikes in the spectrum of a signal being shaped, which is electrically coupled with narrow-band opposite-phase signal shaping channels. The means for shaping the spikes and dips in the shaped signal spectrum is devised in the form of an adder series-connected to the wide-band filter, used commonly by all the narrow-band in-phase signal shaping channels and serving to form spikes in the shaped signal spectrum, and adders also series-connected to said wide-band filter, used individually by each opposite-phase narrow-band signal shaping channel and serving to form dips in the shaped signal spectrum.

Abstract: A series circuit including a transducer responding to the parameters of motion of an object during impact, a pulse shaper and a main switch. Connected to the output of the switch are a unit for measuring the area of the impact pulse, an integrator and two AND-NOT elements. The device also includes three additional switches. One input of one switch is connected to the output of the area measuring unit and the other input of this switch is connected to the output of one AND-NOT, while the output is connected to the input of a memory block. One input of the second switch is connected to the output of the area measuring unit, while the outer input of this switch is connected to the output of the AND-NOT through a NOT element. The output of the second switch is connected to the input of a second memory block.