Autopilot design for flexible aerospace vehicles with experimental results
by Amir Nassirharand, Mohammad Hosain Alizadeh
International Journal of Automation and Control (IJAAC), Vol. 3, No. 4, 2009

Abstract: This paper aims at providing a solution to the problem of an autopilot design for non-agile aerospace vehicles with large length to diameter ratios. It is shown that quantitative feedback theory (QFT) may effectively be used to design an autopilot accounting for structural bending vibrations; this result is experimentally verified. Furthermore, it is demonstrated that a previously proposed factorisation-based autopilot design procedure for use with rigid aerospace vehicles may easily be adopted to arrive at lucid autopilots for flexible launch vehicles; this result is verified by a previously verified six degree-of-freedom simulation code. Although, both factorisation and QFT design approaches result in satisfactory autopilot systems, the factorisation design is simpler than that of QFT. The factorisation-based design man hour is considerably less than that of the QFT approach.

Online publication date: Fri, 26-Jun-2009

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