Specificity of the Analytical Method for Assessing the Stability of Self-oscillations in Relay Systems

Relay control has high interferent immunity, high speed of activity, is simple for maintenance. Relay systems belong to the class of non-linear systems and in most cases are calculated using aproximate methods but in some cases an analytical calculation is possible. In such cases system stability assessment is to be carried out analytically, and the discrete circuits apparatus is used. In case of symmetrical self-oscillations analytical stability, the assessment method is developed for different types of transfer functions. The analytical method stability assessment features are presented for systems with negative hysteresis in case of non-symmetrical self-oscillations.