ABSTRACT
Nowadays, while automating technological processes, there is a tendency to use the general principles of control system design in difficult cases, in which the maximum order considered is outlined and the properties of the plants are used. In the frame of such approach, the specific properties of the plants, due to their physical nature, are simply not considered, but effectively used for goal achievement. This way, new principles and laws of control, along with maintenance, make a high quality of system control possible, and provide high technical and economic indicators. However, in the nonlinear world, there are no standard ways or universal methods, which are characteristic of the linear control theory. Each nonlinearity is different and has several design methods.
