Stationkeeping for an occulter-based exoplanetary imaging mission

Dan Sirbu, Ephraim J. Chen, Matthew S. Isakowitz, Rachel L. Johnson, Daniel W. Maas, N. Jeremy Kasdin

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

5 Scopus citations

Abstract

Space-based direct exoplanetary imaging using an external occulter requires formation flight of a spacecraft constellation. Here we are interested in the position control of a single occulter aligned with the telescope and target star. We consider the nonlinear relative motion spacecraft dynamics in the circularly restricted three-body model in the rotating Sun-Earth frame and generation of the unstable reference trajectory of the occulter in this corotating frame. We implement a linear quadratic regulator for position control of the occulter around a nominal trajectory, and implement an extended Kalman filter for state reconstruction of the occulter relative to the telescope using a least squares fit against the expected out-of-band leakage from the star based on the occulter shape. We provide simulation results of the integrated control and estimation scheme in the presence of solar radiation pressure.

Original languageEnglish (US)
Title of host publicationGuidance and Control 2010 - Advances in the Astronautical Sciences
Subtitle of host publicationProceedings of the 33rd Annual AAS Rocky Mountain Guidance and Control Conference
Pages129-148
Number of pages20
StatePublished - Dec 1 2010
Event33rd Annual AAS Rocky Mountain Guidance and Control Conference - Breckenridge, CO, United States
Duration: Feb 5 2010Feb 10 2010

Publication series

NameAdvances in the Astronautical Sciences
Volume137
ISSN (Print)0065-3438

Other

Other33rd Annual AAS Rocky Mountain Guidance and Control Conference
CountryUnited States
CityBreckenridge, CO
Period2/5/102/10/10

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science

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  • Cite this

    Sirbu, D., Chen, E. J., Isakowitz, M. S., Johnson, R. L., Maas, D. W., & Kasdin, N. J. (2010). Stationkeeping for an occulter-based exoplanetary imaging mission. In Guidance and Control 2010 - Advances in the Astronautical Sciences: Proceedings of the 33rd Annual AAS Rocky Mountain Guidance and Control Conference (pp. 129-148). (Advances in the Astronautical Sciences; Vol. 137).