Control systems with structural diversity are reviewed, along with their prospects for further development. The construction of such systems is based on combined synthesis of the object of control and the control subsystem. The object of control is represented as an object with purposefully changing structure. The need for new control algorithms and approaches for objects with structural diversity is shown. A generalized control system with purposefully changing structure is presented; three approaches to the implementation of this system are discussed. Two problems arising in the creation of small analogs of the objects of control that may be used as physical models in control systems are formulated: (1) ensuring similarity of the control system for the physical model and the industrial control system; (2) developing a control structure with the physical model proposed by Krasovskii. Control of the similarity of the control systems is considered. A control system with a physical model is proposed. The general structure of an identifier in the form of a closed dynamic system is presented.