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Adaptive control of propellant slosh for a launch vehicle with multiple tanksThis paper discusses the use of an adaptive system to stabilize a multi-tank launch vehicle with sloshable fuel. The adaptive system utilizes a sensor to measure the fluid slosh angle, a recursive-least-squares estimator to estimate the natural frequency of the sloshing fuel, and a linear filter which stabilizes the unstable fuel slosh using the frequency estimate. Single-input and multiinput estimators were investigated. The time-varying complexity of the slosh control loop keeps the system persistently excited through flight, even though the attitude is controlled by a conventional PID controller. For the first portion of flight, the adaptive system maintains stability. A modification is proposed for latter portions of flight. The approach requires no tank baffles or partitions.
Document ID
19910065138
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Saugen, John D.
(General Dynamics Corp. San Diego, CA, United States)
Adler, James M.
(General Dynamics Corp. Space Systems Div., San Diego, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1991
Subject Category
Launch Vehicles And Space Vehicles
Report/Patent Number
AIAA PAPER 91-2818
Meeting Information
Meeting: AIAA Guidance, Navigation and Control Conference
Location: New Orleans, LA
Country: United States
Start Date: August 12, 1991
End Date: August 14, 1991
Accession Number
91A49761
Funding Number(s)
CONTRACT_GRANT: F04701-88-C-0110
Distribution Limits
Public
Copyright
Other

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