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

Lee F. Sword; Thomas G. Carne

doi:10.1117/12.155735

10 September 1993 Precision truss structures from concept to hardware reality: application to the Micro-Precision Interferometer Testbed

Lee F. Sword, Thomas G. Carne

Author Affiliations +

Proceedings Volume 1947, Spaceborne Interferometry; (1993) https://doi.org/10.1117/12.155735
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

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.

Citation Download Citation

Lee F. Sword and Thomas G. Carne "Precision truss structures from concept to hardware reality: application to the Micro-Precision Interferometer Testbed", Proc. SPIE 1947, Spaceborne Interferometry, (10 September 1993); https://doi.org/10.1117/12.155735

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