2,250 research outputs found
Multiobjective Robust Control with HIFOO 2.0
Multiobjective control design is known to be a difficult problem both in
theory and practice. Our approach is to search for locally optimal solutions of
a nonsmooth optimization problem that is built to incorporate minimization
objectives and constraints for multiple plants. We report on the success of
this approach using our public-domain Matlab toolbox HIFOO 2.0, comparing our
results with benchmarks in the literature
Alternatives with stronger convergence than coordinate-descent iterative LMI algorithms
In this note we aim at putting more emphasis on the fact that trying to solve
non-convex optimization problems with coordinate-descent iterative linear
matrix inequality algorithms leads to suboptimal solutions, and put forward
other optimization methods better equipped to deal with such problems (having
theoretical convergence guarantees and/or being more efficient in practice).
This fact, already outlined at several places in the literature, still appears
to be disregarded by a sizable part of the systems and control community. Thus,
main elements on this issue and better optimization alternatives are presented
and illustrated by means of an example.Comment: 3 pages. Main experimental results reproducible from files available
on http://www.mathworks.com/matlabcentral/fileexchange/33219 This work has
been submitted to the IEEE for possible publication. Copyright may be
transferred without notice, after which this version may no longer be
accessibl
Lateral fligh control design for a highly flexible aircraft using a nonsmooth method
This paper describes a nonsmooth optimization technique for designing a lateral flight control law for a highly flexible aircraft. Flexible modes and high-dimensional models pose a major challenge to modern control design tools. We show that the nonsmooth approach offers potent and flexible alternatives in this difficult context. More specifically, the proposed technique is used to achieve a mix of frequency domain as well as time domain requirements for a set of different flight conditions
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