Steady-state nonlinearity of open-loop reset systems
X. Zhang (TU Delft - Mechatronic Systems Design)
M. B. Kaczmarek (TU Delft - Mechatronic Systems Design)
S. Hassan HosseinNia (TU Delft - Mechatronic Systems Design)
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Abstract
In this paper, we introduce a new representation for open-loop reset systems. We show that at steady-state a reset integrator can be modelled as a parallel interconnection of the base-linear system and piece-wise constant nonlinearity. For sinusoidal input signals, this nonlinearity takes a form of a square wave. Subsequently, we show how the behaviour of a general open-loop reset system is related to the nonlinearity of a reset integrator. The proposed approach simplifies the analysis of reset elements in the frequency domain and provides new insights into the behaviour of reset control systems.