Automation systems engineering offers different control solutions for complex systems, composed of components from different fields such as: electrical, mechanical, electromechanical, thermal, and hydraulic. To obtain the desired performances the appropriate control structure should be designed. Among the different stages of study, design, and implementation of these structures, the modeling and simulation of the various components is carried out, an often necessary action. The paper presents some behavioral analogies of four types of systems, considering the resistor-inductor (RL) connection, but also the mathematical models and the simulation of the operation of two proportional-integrative control configurations for this kind of system. The facilities of the Matlab/Simulink/Simscape environment were used for calculations, design, and simulations presented in the paper.