A Multi-Loop Control Strategy for Enhanced Nanopositioning

Mohammed Altaher, Sumeet S. Aphale, Douglas Russell

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

Abstract

Vibration problems are inherent in most precision positioning systems. These systems are lightly damped and highly susceptible to mechanical resonance and nonlinearity, such as hysteresis and creep. Traditional approaches use a combination of damping and tracking controllers to deal with nonlinearity and resonance respectively. The damping controller utilised in this work to damp the mechanical resonance of the nanopositioning platform is the Integral Resonant Controller (IRC). This common approach is based on sole use of the integral controller (I) or proportional integral (PI) as a tracking controller to treat nonlinearity. This paper employs a multi-loop feedback scheme as a second-order integral tracking controller in conjunction with the damping controller (IRC). The proposed multi-loop feedback scheme delivers enhanced tracking performance with better compensation for hysteresis in comparison with singleloop tracking.
Original languageEnglish
Title of host publicationThe 6th IASTED African Conference
Subtitle of host publicationModelling and Simulation
Place of PublicationGaborone Botswana
PublisherACTA Press
Pages208-214
Number of pages7
Volume838
DOIs
Publication statusPublished - 5 Sep 2016
EventAfricaEWRM 2016 - Gabarone, Botswana
Duration: 5 Sep 20167 Sep 2016

Conference

ConferenceAfricaEWRM 2016
CountryBotswana
CityGabarone
Period5/09/167/09/16

Keywords

  • nanopositioner stage
  • nonlinearity
  • resonance
  • feedback control

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  • Cite this

    Altaher, M., Aphale, S. S., & Russell, D. (2016). A Multi-Loop Control Strategy for Enhanced Nanopositioning. In The 6th IASTED African Conference : Modelling and Simulation (Vol. 838, pp. 208-214). [838-001] ACTA Press. https://doi.org/10.2316/P.2016.838-001