A new experiment design procedure for identification of dynamic multiple-input multiple-output (MIMO) systems is presented. The implementation of the design is similar to previously proposed rotated input designs based on an estimate of the static gain matrix of the system. However, in the new design procedure, dynamics and input constraints can be explicitly taken into account if an approximate dynamic model is available.
The design problem is formulated as a convex optimization problem, where constraints are handled by linear matrix inequalities (LMIs). The objective is to produce uncorrelated outputs with maximum variance, subject to constraints, in order to maximize identifiability. Standard input designs, where the inputs are perturbed simultaneously in an uncorrelated way, or rotated input designs based on a static gain matrix, do not generally produce outputs with the desired distribution.
Other design procedures to include dynamics and constraints have been suggested, but the proposed procedure is significantly simpler than the previous ones. Because standard software can be used for the design, it is well suited for practical applications. The method is illustrated by application to a distillation column model.
|Title of host publication||27th European Symposium on Computer Aided Process Engineering|
|Editors||Antonio Espuña, Moisès Graells, Luis Puigjaner|
|Publication status||Published - 2017|
|MoE publication type||A4 Article in a conference publication|
|Event||European Symposium on Computer Aided Process Engineering (ESCAPE) - 27th European Society of Computer-Aided Process Engineering (ESCAPE)|
Duration: 1 Oct 2017 → 5 Oct 2017
|Conference||European Symposium on Computer Aided Process Engineering (ESCAPE)|
|Period||01/10/17 → 05/10/17|
- Convex optimization
- Experiment design
- Identification for control
- Multivariable systems
- System identification