Precision truss structures from concept to hardware reality: application to the Micro-Precision Interferometer Testbed

Details Precision truss structures from concept to hardware reality: application to the Micro-Precision Interferometer Testbed Precision truss structures from concept to hardware reality: application to the Micro-Precision Interferometer Testbed

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.1947..104s&link_type=abstract

Proc. SPIE Vol. 1947, p. 104-113, Spaceborne Interferometry, Robert D. Reasenberg; Ed.

Physics

Scientific paper

This paper describes the development of the truss structure at the Jet Propulsion Laboratory that forms the backbone of JPL's Micro-Precision Interferometer (MPI) Testbed. The Micro- Precision Interferometer (MPI) Testbed is the third generation of Control Structure Interaction (CSI) Testbeds constructed by JPL aimed at developing and validating control concepts. The MPI testbed is essentially a space-based Michelson interferometer suspended in a ground- based laboratory. This instrument, mounted to the flexible truss, requires nanometer level precision alignment and positioning of its optical elements to achieve science objectives. A layered control architecture, utilizing isolation, structural control, and active optical control technologies, allow the system to meet its vibration attenuation goals. Success of the structural control design, which involves replacement of truss struts with active and/or passive elements, depends heavily on high fidelity models of the structure to evaluate strut placement locations. The first step in obtaining an accurate structure model is to build a structure which is linear.

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