Doppler lidar system design via interdisciplinary design concept at NASA Langley Research Center: Part II

Aaron I. Crasner; Salvatore Scola; Jeffrey Y. Beyon; Larry B. Petway

doi:10.1117/12.2050370

9 June 2014 Doppler lidar system design via interdisciplinary design concept at NASA Langley Research Center: Part II

Aaron I. Crasner, Salvatore Scola, Jeffrey Y. Beyon, Larry B. Petway

Proceedings Volume 9080, Laser Radar Technology and Applications XIX; and Atmospheric Propagation XI; 90800G (2014) https://doi.org/10.1117/12.2050370
Event: SPIE Defense + Security, 2014, Baltimore, MD, United States

Abstract

Optimized designs of the Navigation Doppler Lidar (NDL) instrument for Autonomous Landing Hazard Avoidance Technology (ALHAT) were accomplished via Interdisciplinary Design Concept (IDEC) at NASA Langley Research Center during the summer of 2013. Three branches in the Engineering Directorate and three students were involved in this joint task through the NASA Langley Aerospace Research Summer Scholars (LARSS) Program. The Laser Remote Sensing Branch (LRSB), Mechanical Systems Branch (MSB), and Structural and Thermal Systems Branch (STSB) were engaged to achieve optimal designs through iterative and interactive collaborative design processes. A preliminary design iteration was able to reduce the power consumption, mass, and footprint by removing redundant components and replacing inefficient components with more efficient ones. A second design iteration reduced volume and mass by replacing bulky components with excessive performance with smaller components custom-designed for the power system. Thermal modeling software was used to run steady state thermal analyses, which were used to both validate the designs and recommend further changes. Analyses were run on each redesign, as well as the original system. Thermal Desktop was used to run trade studies to account for uncertainty and assumptions about fan performance and boundary conditions. The studies suggested that, even if the assumptions were significantly wrong, the redesigned systems would remain within operating temperature limits.

Citation Download Citation

Aaron I. Crasner, Salvatore Scola, Jeffrey Y. Beyon, and Larry B. Petway "Doppler lidar system design via interdisciplinary design concept at NASA Langley Research Center: Part II", Proc. SPIE 9080, Laser Radar Technology and Applications XIX; and Atmospheric Propagation XI, 90800G (9 June 2014); https://doi.org/10.1117/12.2050370

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KEYWORDS

Fluctuations and noise

Thermal analysis

Thermal modeling

Doppler effect

LIDAR

Interfaces

Osmium

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