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SLS Trade Study 0058: Day of Launch (DOL) Wind BiasingSLS heritage hardware and legacy designs have shown load exceedances at several locations during Design Analysis Cycles (DAC): MPCV Z bending moments; ICPS Electro-Mechanical Actuator (EMA) loads; Core Stage loads just downstream of Booster forward interface. SLS Buffet Loads Mitigation Task Team (BLMTT) tasked to study issue. Identified low frequency buffet load responses are a function of the vehicle's total angle of attack (AlphaTotal). SLS DOL Wind Biasing Trade team to analyze DOL wind biasing methods to limit maximum AlphaTotal in the M0.8 - 2.0 altitude region for EM-1 and EM-2 missions through investigating: Trajectory design process; Wind wavelength filtering options; Launch availability; DOL process to achieve shorter processing/uplink timeline. Trade Team consisted of personnel supporting SLS, MPCV, GSDO programs.
Document ID
20140008595
Acquisition Source
Marshall Space Flight Center
Document Type
Presentation
Authors
Decker, Ryan K. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Duffin, Paul (NASA Johnson Space Center Houston, TX, United States)
Hill, Ashley (NASA Marshall Space Flight Center Huntsville, AL, United States)
Beck, Roger (NASA Marshall Space Flight Center Huntsville, AL, United States)
Dukeman, Greg (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
June 30, 2014
Publication Date
March 19, 2014
Subject Category
Launch Vehicles And Launch Operations
Spacecraft Design, Testing And Performance
Report/Patent Number
M14-3408
Report Number: M14-3408
Funding Number(s)
WBS: WBS 585777.02.20.06.02.10
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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