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Proceedings Paper

Doppler lidar system design via interdisciplinary design concept at NASA Langley Research Center: Part I
Author(s): Charles M. Boyer; Trevor P. Jackson; Jeffrey Y. Beyon; Larry B. Petway
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Paper 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. Mechanical placement collaboration reduced potential electromagnetic interference (EMI). Through application of newly selected electrical components and thermal analysis data, a total electronic chassis redesign was accomplished. Use of an innovative forced convection tunnel heat sink was employed to meet and exceed project requirements for cooling, mass reduction, and volume reduction. Functionality was a key concern to make efficient use of airflow, and accessibility was also imperative to allow for servicing of chassis internals. The collaborative process provided for accelerated design maturation with substantiated function.

Paper Details

Date Published: 9 June 2014
PDF: 7 pages
Proc. SPIE 9080, Laser Radar Technology and Applications XIX; and Atmospheric Propagation XI, 90800E (9 June 2014); doi: 10.1117/12.2050365
Show Author Affiliations
Charles M. Boyer, NASA Langley Research Ctr. (United States)
Trevor P. Jackson, Old Dominion Univ. (United States)
Jeffrey Y. Beyon, NASA Langley Research Ctr. (United States)
Larry B. Petway, NASA Langley Research Ctr. (United States)

Published in SPIE Proceedings Vol. 9080:
Laser Radar Technology and Applications XIX; and Atmospheric Propagation XI
Monte D. Turner; Linda M. Wasiczko Thomas; Gary W. Kamerman; Earl J. Spillar, Editor(s)

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