Problems on imitation modelling of algorithms of identification of technical objects are discussed in this article. The authors offer effective method on how to use a priori information of the technical objects, which is collected during their project and exploitation stages. New methods are offered on how to formalize a priori information and how to use it in the computercontrolled algorithms. They are based on the mathematical models, which imitate typical operating conditions of technical objects. These mathematical models are built upon transformation functions of digital models, which are equivalent to transformation functions of the technical objects. There are difficulties on obtaining numerical values for parameters of technical objects. New methods must be used for developing effective software tools to solve problems of identification for technical objects.