Description of processes of electromechanical systems by «state-space» approach. Developing of estimating algorithms for variables of a state and identification of unknown parameters of system. Developing of methods of synthesis for the regulators providing indemnification of influence of interconnected systems on each others parameters and operation of electromechanical systems in conditions of parametrical uncertainty. Designing of mathematical model by a principle of «state-space» and synthesis optimum robust control for the speed of turn of blades of the propeller for a water vessel. Modeling by Mathworks Matlab 7.0 Software, Simulink 6.0 and using S-functions interface which allows designing continuous object in discrete control system with the set period of quantization.