Volume 6, 2013Progress in Flight Dynamics, Guidance, Navigation, Control, Fault Detection, and Avionics
|Page(s)||671 - 684|
|Section||Flexible aircraft control|
|Published online||02 December 2013|
Low order H∞ optimal control for ACFA blended wing body aircraft
Czech Technical University in Prague Prague, Czech Republic
Advanced nonconvex nonsmooth optimization techniques for fixed-order H∞ robust control are proposed in this paper for design of flight control systems (FCS) with prescribed structure. Compared to classical techniques − tuning of and successive closures of particular single-input single-output (SISO) loops like dampers, attitude stabilizers, etc. − all loops are designed simultaneously by means of quite intuitive weighting filters selection. In contrast to standard optimization techniques, though (H2, H∞ optimization), the resulting controller respects the prescribed structure in terms of engaged channels and orders (e. g., proportional (P), proportional-integral (PI), and proportional-integralderivative (PID) controllers). In addition, robustness with regard to multimodel uncertainty is also addressed which is of most importance for aerospace applications as well. Such a way, robust controllers for various Mach numbers, altitudes, or mass cases can be obtained directly, based only on particular mathematical models for respective combinations of the §ight parameters.
© Owned by the authors, published by EDP Sciences, 2013
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