The purpose of this work is to observe the dependence of the response of a system previously calculated using a linear model to typical actions if they are applied not to a model linear system, but to a real object containing nonlinear elements. 
The object of research is a mobile radar antenna. The purpose of object control is to maintain a constant angular velocity of the antenna. Typical impacts on the system are selected based on the characteristics of the object and its scope. Among the operating modes of the object are long-term observation of the entire surrounding space (continuous rotation of the antenna) and observation of a certain sector (periodic rotational movements of an oscillatory nature). Short-term impacts of large amplitude and high-frequency impacts of small amplitude can be applied to the input of the object due to the features of the line that supplies the input signal to the system. Periodic oscillatory effects can be applied to the antenna from the outside, this is due to the specifics of the location of the control object on the ground.