Subharmonic oscillations in on-off control systems

THE PHENOMENON of subharmonic oscillations in nonlinear systems has been studied for a long time in the technical field because of the undesirable influence it has on the operation of, e.g., magnetic devices. But works devoted to their occurrence in nonlinear servomechanisms, such as the work by J. West and J. Douce1 for the particular case of third-order nonlinearity, are not numerous. In this paper a contribution to the study of subharmonic oscillations in on-off control systems is presented.