Automation control systems with polynomial dynamics description are considered in the paper.Characteristic equation coefficients of these systems are changeable in infinite intervals of actual values.A root portrait concept of an helmets interval control system has been introduced.Root portraits have been used to investigate dynamics of interval automation control systems described by characteristic equations of the third power.Some regularities in change of system Kratom Liquids behavior and characteristics due to application of various parameters have been observed.
These regularities may be applied for development of synthesis and analysis methods on automation control systems by various technical objects.