Jerk and current limited flatness-based open loop control of foveation scanning electrostatic micromirrors

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Contributors

Abstract

This paper describes open loop control measures for performance improvements of electrostatic micromirrors in context with foveation scanning for 3D time-of-flight cameras. The generation of high accuracy scanning trajectories with scene dependent variable slope is realized by a flatness-based open loop control scheme. Previous flatness-based control solutions have shown unfavorable residual oscillations excited at slope reverse points and high drive currents at zero-crossing comb deflection due to square-root voltage law for electrostatic mirror control. Jerk limited trajectories are introduced for reduction of residual oscillations and their impact on scanning trajectory properties is expressed by design formulas. A considerable reduction of zero-crossing drive currents can be achieved by using a dual-comb control law at small deflection angles reducing the effective drive voltage slope. The paper addresses the basic micromirror models and describes in detail the jerk and current limitation control measures in context with the flatness-based control concept. Experimental results prove the adequacy of the proposed solutions.

Details

Original languageEnglish
Title of host publication19th IFAC World Congress IFAC 2014, Proceedings
EditorsEdward Boje, Xiaohua Xia
PublisherIFAC Secretariat
Pages2685-2690
Number of pages6
ISBN (electronic)9783902823625
Publication statusPublished - 2014
Peer-reviewedYes

Publication series

SeriesIFAC Proceedings Volumes
Number3
Volume47
ISSN1474-6670

Conference

Title19th IFAC World Congress on International Federation of Automatic Control
Abbreviated titleIFAC 2014
Conference number19
Duration24 - 29 August 2014
Website
Degree of recognitionInternational event
CityCape Town
CountrySouth Africa

External IDs

Scopus 84929832769
ORCID /0000-0003-3259-4571/work/142249664

Keywords

ASJC Scopus subject areas

Keywords

  • Mikrospiegel Optoelektronik