Popov-like frequency criterion for existence of forced periodic oscillations
1998
This paper deals with sufficient conditions for existence of forced periodic oscillations in control systems. These conditions use frequency properties of the linear plant and sector estimates of the nonlinearity, under a form closely related to Popov criterion. The results concern a general class of systems with time-dependent nonlinearities, as well as some nonlinearities with memory, especially hysteresis nonlinearities.
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