On direct versus indirect methods for reduced-order controller design

Comparisons are obtained between direct (parameter optimization) and indirect (controller reduction) methods in reduced-order controller design. In particular, the authors compare the controller canonical correlation coefficients method of C. De Villemagne and R.E. Skelton (1988) to the optimal proj...

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Bibliographic Details
Published in:IEEE transactions on automatic control 1990-03, Vol.35 (3), p.377-379
Main Authors: Hyland, D.C., Richter, S.
Format: Article
Language:English
Subjects:
Algorithm design and analysis
Applied sciences
Bandwidth
Computer science
control theory
systems
Constraint optimization
Control system synthesis
Control systems
Control theory. Systems
Design optimization
Disk drives
Equations
Exact sciences and technology
Government
Optimal control
Optimization methods
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Summary:Comparisons are obtained between direct (parameter optimization) and indirect (controller reduction) methods in reduced-order controller design. In particular, the authors compare the controller canonical correlation coefficients method of C. De Villemagne and R.E. Skelton (1988) to the optimal projection theory of D.C. Hyland and D.S. Bernstein (1984). It is noted that suboptimal methods may, in certain cases, be simpler to implement than optimal methods. Thus, the choice of direct versus indirect methods can be viewed as a tradeoff between design simplicity and actual control-system performance.< >
ISSN:0018-9286
1558-2523
DOI:10.1109/9.50364