Intermittent Sampling in Repetitive Control
Exploiting Time-Varying Measurements
Johan Kon (Eindhoven University of Technology)
Nard Strijbosch (Eindhoven University of Technology)
Sjirk Koekebakker (Eindhoven University of Technology)
T.A.E. Oomen (TU Delft - Mechanical Engineering)
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Abstract
The performance increase up to the sensor resolution in repetitive control (RC) invalidates the standard assumption in RC that data is available at equidistant time instances, e.g., in systems with package loss or when exploiting timestamped data from optical encoders. The aim of this paper is to develop an intermittent sampling RC framework for non-equidistant measurements. Sufficient stability conditions are derived that can be verified using non-parametric frequency response function data. This results in a frequency domain design procedure to explicitly address uncertainty. The RC framework is validated on an industrial printbelt setup for which exact non-equidistant measurement data is available.