MEMS accelerometers in accurate mount positioning systems

László Mészáros, András Pál, Attila Jaskó

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

Abstract

In order to attain precise, accurate and stateless positioning of telescope mounts we apply microelectromechanical accelerometer systems (also known as MEMS accelerometers). In common practice, feedback from the mount position is provided by electronic, optical or magneto-mechanical systems or via real-time astrometric solution based on the acquired images. Hence, MEMS-based systems are completely independent from these mechanisms. Our goal is to investigate the advantages and challenges of applying such devices and to reach the sub-arcminute range { that is well smaller than the field-of-view of conventional imaging telescope systems. We present how this sub-arcminute accuracy can be achieved with very cheap MEMS sensors. Basically, these sensors yield raw output within an accuracy of a few degrees. We show what kind of calibration procedures could exploit spherical and cylindrical constraints between accelerometer output channels in order to achieve the previously mentioned accuracy level. We also demonstrate how can our implementation be inserted in a telescope control system. Although this attainable precision is less than both the resolution of telescope mount drive mechanics and the accuracy of astrometric solutions, the independent nature of attitude determination could significantly increase the reliability of autonomous or remotely operated astronomical observations.

Original languageEnglish
Title of host publicationAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation
EditorsColin R. Cunningham, Ramon Navarro, Allison A. Barto
PublisherSPIE
ISBN (Electronic)9780819496195
DOIs
Publication statusPublished - 2014
EventAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation - Montreal, Canada
Duration: Jun 23 2014Jun 27 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9151
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation
CountryCanada
CityMontreal
Period6/23/146/27/14

Keywords

  • Accelerometer
  • Instrumentation: miscellaneous
  • MEMS
  • Pointing model

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Mészáros, L., Pál, A., & Jaskó, A. (2014). MEMS accelerometers in accurate mount positioning systems. In C. R. Cunningham, R. Navarro, & A. A. Barto (Eds.), Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation [915162] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9151). SPIE. https://doi.org/10.1117/12.2064617