Generalized sampled-data holds to reduce energy consumption in resonant systems

Abstract

This paper presents an exhaustive experimental study on the performance of a new design of generalized sampled-data hold function (GSHF) introduced in Ugalde, Bárcena, and Basterretxea (2012). First a simple tuning procedure is developed for the GSHF to improve the intersample response while not damaging the plant output response. Next the reconstruction algorithm is enhanced so that the GSHF can remove the steady-state errors that dry friction causes in positioning systems. The experiments conducted on a small-scale lightly damped resonant system show that significant energy savings can be achieved in regulation with no extra hardware, and that no additional computational load results, except having to call the D/A converter more than once per sampling period.