The velociprobe: Pushing the limits with fast and robust control

Sheikh T. Mashrafi, Curt Preissner, Srinivasa M. Salapaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This article shows the benefit of feedback control algorithm, specifically the H∞ control architecture that we are showcasing, through the improvement of X-ray imaging capabilities in terms of speed of X-ray imaging resulting from large scanning bandwidth, better resolution of the optics scanning stages, better resolution of the Xray diffraction images and reduced imaging artifacts. The open loop drift present in the zoneplate stages and the sample stages are being reduced by H∞ controller for both operation modes; the zone-plate only and the relative displacement case. Better positioning resolution was achieved for the step scanning in closed-loop for both operation modes. At present, the designed controllers are not being utilized to the full potential because of the step scanning technique. The fly-scan technique implemented with the H∞ controllers would reduce the time to scan a target region even more, giving the capability to scan large regions on a sample.

Original languageEnglish (US)
Title of host publicationProceedings - 32nd ASPE Annual Meeting
PublisherAmerican Society for Precision Engineering, ASPE
Pages468-473
Number of pages6
ISBN (Electronic)9781887706742
StatePublished - Jan 1 2016
Event32nd Annual Meeting of the American Society for Precision Engineering, ASPE 2017 - Chartlotte, United States
Duration: Oct 29 2017Nov 3 2017

Publication series

NameProceedings - 32nd ASPE Annual Meeting

Other

Other32nd Annual Meeting of the American Society for Precision Engineering, ASPE 2017
CountryUnited States
CityChartlotte
Period10/29/1711/3/17

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Mechanical Engineering

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