  This contribution deals with identification of fractional-order dynamical
systems. We consider systems whose mathematical description is a three-member
differential equation in which the orders of derivatives can be real numbers.
We give a discretization method and a numerical solution of differential
equations of this type. An experimental method of identification is given which
is based on evaluation of transfer characteristics. This is a combination of
the method of derivatives of transfer characteristics and of the method of
passive search. The verification was performed on systems with known parameters
and also on a laboratory object.
