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Coherent Lidar Turbulence Measurement for Gust Load AlleviationAtmospheric turbulence adversely affects operation of commercial and military aircraft and is a design constraint. The airplane structure must be designed to survive the loads imposed by turbulence. Reducing these loads allows the airplane structure to be lighter, a substantial advantage for a commercial airplane. Gust alleviation systems based on accelerometers mounted in the airplane can reduce the maximum gust loads by a small fraction. These systems still represent an economic advantage. The ability to reduce the gust load increases tremendously if the turbulent gust can be measured before the airplane encounters it. A lidar system can make measurements of turbulent gusts ahead of the airplane, and the NASA Airborne Coherent Lidar for Advanced In-Flight Measurements (ACLAIM) program is developing such a lidar. The ACLAIM program is intended to develop a prototype lidar system for use in feasibility testing of gust load alleviation systems and other airborne lidar applications, to define applications of lidar with the potential for improving airplane performance, and to determine the feasibility and benefits of these applications. This paper gives an overview of the ACLAIM program, describes the lidar architecture for a gust alleviation system, and describes the prototype ACLAIM lidar system.
Document ID
19960042886
Acquisition Source
Armstrong Flight Research Center
Document Type
Conference Paper
Authors
Bogue, Rodney K. (NASA Dryden Flight Research Center Edwards, CA United States)
Ehernberger, L. J. (NASA Dryden Flight Research Center Edwards, CA United States)
Soreide, David (Soreide (David) Seattle, WA United States)
Bagley, Hal (Coherent Technologies, Inc. Boulder, CO United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1996
Subject Category
Aircraft Instrumentation
Report/Patent Number
NAS 1.15:104318
H-2117
NASA-TM-104318
SPIE Paper 2832-05
Meeting Information
Meeting: SPIE 1996 International Symposium on Optical Science, Engineering, and Instrumentation
Location: Denver, CO
Country: United States
Start Date: August 4, 1996
End Date: August 9, 1996
Accession Number
96N31787
Funding Number(s)
PROJECT: RTOP 505-69-59
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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