Generalized sample hold functions-frequency domain analysis of robustness, sensitivity, and intersample difficulties

Over the past 5 years, there has been substantial interest in the use of generalized sample hold functions for control. In this correspondence, the authors use a tool, which is novel in this context, namely, amplitude modulation theory. The authors employ this tool to analyze the quantitative and qualitative features of the intersample behavior in a frequency domain setting. This offers new theoretical and practical insights into the method. The authors' conclusion is that the perceived benefits come at substantial cost which makes its practical use questionable.<
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