unsteady oscillations

When testing the crane systems via the wobble frequency method they undergo the consequent influence of vibrations at all frequencies of the set range. The choice of modes of the crane systems’ accelerated tests with respect to sinusoidal vibration influence at the changing transmitter frequency requires the definition of the dynamic amplitude frequency characteristics (AFC) of items of the cranes’ mechatronic supervision systems (MSS).

Purpose. In order to adequately describe real processes that characterize the spread in the crust harmonic electromagnetic field (EMF) excited by artificial sources , unlike classical models (homogeneous and piecewise homogeneous half-space), a locally inhomogeneous half-space (its electrical characteristics depend on coordinate only within the local area) is considered.