Reduced Order Internal Models in the Frequency Domain
Research output: Contribution to journal › Article › Scientific › peer-review
|Journal||IEEE Transactions on Automatic Control|
|Publication status||Published - 2018|
|Publication type||A1 Journal article-refereed|
The internal model principle states that all robustly regulating controllers must contain a suitably reduplicated internal model of the signal to be regulated. Using frequency domain methods, we show that the number of the copies may be reduced if the class of perturbations in the problem is restricted. We present a two stage design procedure for a simple controller containing a reduced order internal model achieving robust regulation. The results are illustrated with an example of a five tank laboratory process where a restricted class of perturbations arises naturally.
ASJC Scopus subject areas
- Adaptive control, Aerospace electronics, Frequency control, Frequency-domain analysis, Linear systems, Mathematical model, model/controller reduction, output tracking, robust control, Robustness, Uncertainty