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Optimal strictly positive real controllers using direct optimization
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DOI：10.1016/j.jfranklin.2005.12.004.png)
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Abstract
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In this paper, we consider the H-2-optimal control problem subject to the constraint that the resulting controller be strictly positive real. A direct numerical optimization approach is adopted in conjunction with a controller parametrization that is linear in the unknown parameters. The SPR constraint is easily expressed at each frequency in the form of a linear inequality. The method is applied to a numerical example from the literature and good results are achieved. In particular, the proposed method is particularly adept at determining low order controllers. (c) 2006 The Franklin Institute. Published by Elsevier Ltd. All rights reserved.
Keywords:
FREQUENCY-DOMAIN CONDITIONS
SYSTEMS
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