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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Flight System Testbed Verification of the Mars Pathfinder Attitude Control System
Pathfinder is the first in a series of Mars exploration projects that are fundamental elements of the Discovery Program missions funded by the (NASA).
Optical Pathlength Control Experiment on JPL Phase B Testbed
An experimental implementation of a nanometer level optical pathlength control for large baseline space interferometry is presented. The pathlength compensation system is installed on a large flexible experimental truss, thus structural motions play a dominant role in the control system design. The associated control structure interaction problem is addressed to maintain the optical pathlength within the prescribed variation of 10-15 nanometer rms. By a successful blend of a structural control for damping augmentation and a direct pathlength control for the pathlength compensation, the optical pathlength variation has been maintained within 6 nonometer rms under the laboratory ambient disturbance and within 9 nonmeter rms under a severe forced resonant disturbance.
Integrated Modeling Methodology Validation Using the Micro-Precision Interferometer Testbed
This paper validates the integrated modeling methodology used for design and performance evaluation of complex opto-mechanical systems, particularly spaceborne interferometers. The methodology integrates structural modeling, optical modeling, and control system design into a common environment, the Integrated Modeling of Optical Systems (IMOS) software package.
Integrated Modeling Methodology Validation Using the Micro-Precision Interferometer Testbed: Assessment of Closed Loop Performance Prediction Capability
This paper validates the integrated modeling methodology used for design and performance evaluation of complex opto-mechanical systems, particularly spaceborne interferometers.
Metrology system for Space Interferometry Mission system testbed 3
In a 3-baseline interferometer fourteen metrology gauges are used to monitor changes in the two baselines and calculate the length of the third. Simulation for estimating the third baseline indicates measurement capability of better than 1 nm error.
Metrology for the Micro-Arcsecond Metrology Testbed
The Space Interferometry Mission (SIM) relies on the combination of interferometry with a metrology system capable of measureing picometer relative length changes and micrometer absolute lengths.
An Integrated Model Validation Study of the Wave Front Tip/Tilt System Using the Micro-Precision Interferometer Testbed
This paper presents a validation study of a specific integrated modeling methodology which is a candidate tool for modeling complex opto-mechanical systems such as spaceborne interferometers.
The Earth system grid federation as a testbed for global distributed data analytics
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Testbeds and technologies for potential Mars orbital sample capture and manipulation
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