This 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.


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    Titel :

    Adaptive control of propellant slosh for a launch vehicle with multiple tanks


    Beteiligte:
    Saugen, John D. (Autor:in) / Adler, James M. (Autor:in)

    Kongress:

    AIAA Guidance, Navigation and Control Conference ; 1991 ; New Orleans, LA, United States


    Erscheinungsdatum :

    1991-01-01


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch





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