A.-C. Witsel, V. Barbieux, C. Renotte, and M. Remy (Belgium)
Cement kiln, Dynamic model, Multi-loop PI control
The quality of clinker, and thus of cement, highly de
pends on the temperature profile in the kiln during the burn
ing process and the design of efficient control structures is
therefore fundamental. The objective of cement kiln con
trol is to reduce the disturbing effects in the kiln in order to
produce good and constant quality clinker.
In this contribution, a simulation study of a multi-loop
control scheme, designed using a frequency approach, is
proposed. It takes into account the interactions between the
different variables. Furthermore, this control structure only
uses two PI controllers and is so well suited for a possible
The simulation of the behaviour of the cement kiln is
performed using a dynamic model. The implementation of
this model gives us an interesting simulation tool for the
design of the control structure.
Different kinds of disturbances were considered to
test the control efficiency. In all these case studies, the
disturbance effects were correctly reduced and the MIMO
control scheme proposed leads thus to good performances.