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Proceedings Paper

Integrated modeling applied to the Terrestrial Planet Finder mission
Author(s): Andrew Kissil; Eug Kwack; Timothy Ho; Philip Dumont; Sandra Irish; Ichung Weng
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Paper Abstract

Integrated Modeling is currently being used to assess the feasibility of a baseline design concept (pre-phase A), developed for the Coronagraph version of the Terrestrial Planet Finder (TPF) mission. This design concept incorporates many challenging design elements for a space-born observatory: including a monolithic 8 by 3.5 meter elliptical primary mirror; a 12 meter long deployable secondary mirror support structure; as well as a 14 meter long deployable, tensioned-membrane, V-groove sunshield. Unprecedented thermal and dynamic stability is required by this flight system to allow observation of enough contrast between planets and their parent stars. This stringent performance requirement necessitates a balanced system, designed to optimize the various interacting disciplines: optical, thermal, structural & control. To support design feasibility studies, a MATLAB-environment-based integrated modeling tool (IMOS: Integrated Modeling of Optical Systems) was employed for analyzing the end-to-end system performance for typical in-orbit maneuvers. Our integrated modeling goal is to use a single model definition file to specify the thermal, structural, and optical modeling and analysis parameters, improving results accuracy, configuration control and data management. In working towards that goal, we have had parallel efforts in IMOS capability development, as well as design concept modeling and analysis. Typical system performance metrics studied include the relative motions of the optical elements, as well as the deformation of individual optics, decomposed into best-fitting Zernike polynomials.

Paper Details

Date Published: 24 August 2005
PDF: 12 pages
Proc. SPIE 5867, Optical Modeling and Performance Predictions II, 586710 (24 August 2005); doi: 10.1117/12.615546
Show Author Affiliations
Andrew Kissil, Jet Propulsion Lab. (United States)
Eug Kwack, Jet Propulsion Lab. (United States)
Timothy Ho, Jet Propulsion Lab. (United States)
Philip Dumont, Jet Propulsion Lab. (United States)
Sandra Irish, NASA Goddard Space Flight Ctr. (United States)
Ichung Weng, Swales Aerospace (United States)


Published in SPIE Proceedings Vol. 5867:
Optical Modeling and Performance Predictions II
Mark A. Kahan, Editor(s)

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