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Inverting and noninverting H∞ controllers

✍ Scribed by Urs Christen; Hans P. Geering

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
413 KB
Volume
30
Category
Article
ISSN
0167-6911

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✦ Synopsis

It is well known that two-block S/KS/T H~ problems in which the plant is weighted at the output tend to invert the plant in the controller. This paper shows that even four-block S/KS/T problems in which the plant is weighted at the input result in controllers which invert the plant. However, if a GS/T weighting scheme is used where the weight for the sensitivity includes the plant, the inversion is avoided. This GS/T scheme therefore is especially suited for ill-conditioned plants. An example confirms these results. (~) 1997 Elsevier Science B.V.

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